Drag-reducing enclosure for a goods vehicle

Abstract

A drag-reducing enclosure (14) for a goods vehicle (10) is described. The enclosure (14) is reconfigurable between a first configuration and a second, drag- reducing, configuration. In the second configuration, the side walls (16) of the enclosure (14) are tapered inwards so as to reduce aerodynamic drag during transport.

Description

[0001] DRAG-REDUCING ENCLOSURE FOR A GOODS VEHICLE

[0002] FIELD

[0003] This relates to a drag-reducing enclosure, e.g. trailer, for a goods vehicle and to a goods vehicle comprising said drag-reducing enclosure.

[0004] BACKGROUND

[0005] National, international and global supply chains often require the transportation of goods over substantial distances, with a significant proportion of goods being transported over road (commonly known as road haulage) using goods vehicles.

[0006] Despite their widespread use, goods vehicles by their nature have a number of drawbacks.

[0007] For example, in order to transport as many goods as possible per journey it is desirable to have a large cargo-carrying enclosure, e.g. trailer. However, large cargocarrying enclosures cause a significant amount of aerodynamic drag during transport, this in turn causing a significant reduction in fuel economy of the vehicle. In addition to increasing the cost of road transportation as a means of transporting goods, poor fuel economy is detrimental to the environment.

[0008] A number of means to improve drag performance have been proposed.

[0009] GB 2481434 A describes a cargo carrying vehicle having a load carrying enclosure located rearwardly of a driver's cab of the vehicle. The enclosure has at least a front wall, a roof, a base and sides. Going in a direction rearwardly of the vehicle, the exterior surfaces of the sides have a leading portion extending outwardly over part of the length of the enclosure and a trailing portion extending inwardly towards the rear end of the enclosure. At the junctions of the leading and trailing portions, the enclosure may be 3 to 12% wider than at the front end of the enclosure with the front and rear ends of the enclosure being of the same width. The leading and trailing portions may be smoothly curved as seen in plan view and may be of aerofoil section.

[0010] GB 2474379 A describes a trailer having a roof including a front or leading portion which is inclined upwardly in a rearward direction from a leading front edge of the roof and having a rear portion which is inclined downwardly in a rearward direction from said front or leading portion to a rear edge of the roof. The front or leading portion is smoothly curved upwardly from front edge to the highest location of the roof and the rear portion curves smoothly downwardly from the leading / front portion to rear edge. The radius of curvature of the front / leading portion is somewhat greater than the radius of curvature of

[0011] 55739168-1 the rear portion and thus the roof is generally, of partial teardrop cross section. The leading face of the trailer may curve forwardly and upwardly in a curved, concave manner to parallel the profile of the rear face of the driver's cab.

[0012] US 2011037291 A1 describes a device for reducing drag caused by a rear wake of a trailer. The device includes an enclosure supported by support assemblies. The support assemblies include a first corner support extending along a first junction between top and first side portions of the enclosure, a second corner support extending along a second junction between the top portion and a second side portion of the enclosure, a third corner support extending along a third junction between a bottom portion and the second side portion of the enclosure, a fourth corner support extending along a fourth junction between the bottom and first side portions of the enclosure, a first diagonal support extending from the first junction to the third junction, and a second diagonal support extending from the second junction to the fourth junction. The enclosure and support assemblies are coupled to the trailer by a coupling assembly.

[0013] US 2011068603 A1 describes a drag reducing apparatus for a vehicle. This is accomplished by attaching an inflatable boat tail (i.e. drag reducer) to the aft face or rear end of a vehicle or trailer, thus delaying the flow separation to a point further downstream and mitigating the intensity of the negative pressure on the aft face.

[0014] US 2019100254 A1 describes a tapered van trailer that is wider in front and smaller in rear is disclosed.

[0015] 55739168-1 SUMMARY

[0016] Aspects of the present disclosure relate to a drag-reducing enclosure, e.g. a trailer, for a goods vehicle and to a goods vehicle comprising said enclosure.

[0017] According to a first aspect, there is provided an enclosure for a goods vehicle, wherein the enclosure is reconfigurable between a first configuration and a second, reduced drag, configuration, wherein in the second configuration the side walls of the enclosure are tapered inwards so as to reduce aerodynamic drag during transport.

[0018] In use, the enclosure may be configured in the first configuration - in which the side walls of the enclosure may be parallel or substantially parallel to each other - when the enclosure is full. The enclosure may then be reconfigured to the second configuration in-journey, e.g. after a given delivery or after the entire contents of the enclosure have been delivered.

[0019] An enclosure according to the present disclosure provides a number of significant benefits over conventional systems.

[0020] For example, when in the first configuration the enclosure permits the amount of goods and / or cargo to be maximised, thereby maximising the amount of goods and / or cargo that can be can transported per journey. The enclosure can be reconfigured when the enclosure is not full and thus would otherwise contain “dead” space to the dragreducing second configuration, thereby improving fuel economy, and in turn efficacy of road transport and environmental benefit.

[0021] Beneficially, an enclosure according to the present disclosure can produce a decrease of up to 20% in aerodynamic drag, with the potential to reduce fuel consumption by 10 to 14%.

[0022] The enclosure may be reconfigurable between the first configuration and the second, reduced drag, configuration during a reverse manoeuvre of the good vehicle.

[0023] In use, the reconfiguration of the enclosure from the first configuration to the second, reduced drag, configuration may be activated during a reverse manoeuvre of the goods vehicle.

[0024] Beneficially, by way of tapering the side walls of the enclosure inwards, the level of jack-knifing required to be reached during the completion of a reverse manoeuvre in order to permit the driver of a goods vehicle to view the rear of the enclosure is reduced. In other words, the further along the longitudinal axis relative to the rear of the enclosure that the tapering begins, the less the enclosure jack-knifes relative to the goods vehicle itself before the driver gains a clear view of the typical rear blind spot. As such, the

[0025] 55739168-1 enclosure improves the safety and manoeuvrability with which a goods vehicle can be operated.

[0026] The enclosure may be reconfigurable between the first configuration and the second, reduced drag, configuration during high crosswinds.

[0027] In use, the reconfiguration of the enclosure from the first configuration to the second, reduced drag, configuration may be activated during high crosswinds.

[0028] Beneficially, the tapering of the side walls as described improves the ability of the enclosure to deflect airflow during strong crosswinds, thus reducing and / or mitigating any associated risk of the enclosure / the goods vehicle overturning. In instances where the enclosure has become lighter or only partially loaded, the reduction and / or mitigation of the risk of overturning is particularly beneficial.

[0029] In particular embodiments, the enclosure comprises or takes the form of a trailer.

[0030] The enclosure, e.g. trailer, may be configured for coupling to the goods vehicle.

[0031] Alternatively, the enclosure, e.g. trailer, may be integrally formed with the goods vehicle.

[0032] The reconfiguration of the enclosure from the first configuration to the second, reduced drag, configuration may be achieved by a number of means.

[0033] The enclosure may comprise an adjustment arrangement.

[0034] The adjustment arrangement may comprise an actuation arrangement.

[0035] The actuation arrangement may be configured and / or operable to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration. The actuation arrangement may be configured and / or operable to pull the side walls inwards and reconfigure the enclosure to the second, reduced drag, configuration.

[0036] The actuation arrangement may be configured and / or operable to reconfigure the enclosure from the second, reduced drag, configuration to the first configuration. The actuation arrangement may be configured and / or operable to push the side walls outwards and reconfigure the enclosure to the first configuration.

[0037] The actuation arrangement may comprise one or more of: a fluid-powered actuation arrangement, e.g. a hydraulic actuation arrangement or a pneumatic actuation arrangement; an electric actuation arrangement; and a mechanical actuation arrangement.

[0038] The actuation arrangement may comprise one or more actuators, e.g. linear actuators. The or each actuator may comprise or take the form of: a fluid-powered

[0039] 55739168-1 actuator, e.g. a hydraulic actuator or pneumatic actuator; an electric actuator; or a mechanical actuation arrangement.

[0040] Alternatively, or additionally, the actuation arrangement may comprise or take the form a belt drive.

[0041] Alternatively, or additionally, the actuation arrangement may comprise or take the form of a screw drive actuation arrangement. The actuation arrangement may comprise at least one carriage. The actuation arrangement may comprise a plurality of carriages. The actuation arrangement may comprise at least one lead screw. The actuation arrangement may comprise a plurality of lead screws. At least one of the carriages may be coupled to and / or operatively associated with a corresponding one of the lead screws. At least one of the carriages may be coupled to and / or operatively associated with a corresponding one of the side walls. At least one of the carriages may be coupled to and / or operatively associated with a top portion of a corresponding one of the side walls.

[0042] Each of the carriages of the actuation arrangement may be configured as described herein.

[0043] In use, upon rotation of the lead screws by means of an electric motor, the corresponding carriages are translated laterally such that the corresponding side walls are either pulled inwards or pushed outwards for the purposes of reconfiguration of the enclosure between the first configuration and the second, reduced drag, configuration.

[0044] Alternatively, or additionally, the reconfiguration of the enclosure from the first configuration to the second, reduced drag, configuration may be achieved manually.

[0045] The enclosure may comprise a rear door arrangement.

[0046] The rear door arrangement may be configured and / or operable to facilitate reconfiguration of the enclosure between the first configuration and the second configuration.

[0047] The rear door arrangement may be reconfigurable from a first configuration in which the rear door arrangement has a first width and a second configuration in which the rear door arrangement has a second, smaller, width.

[0048] The enclosure may be reconfigurable from its first configuration to its second, drag-reducing, configuration by reconfiguring the rear door arrangement from its first configuration to its second, reduced width, configuration.

[0049] The rear door arrangement may comprise a plurality of doors. The rear door arrangement may be reconfigurable between a first, closed, configuration and a second, open, configuration. The rear door arrangement may be configured in the first, closed,

[0050] 55739168-1 configuration in the first configuration. The rear door arrangement may be configured in the second, open, configuration in the second, reduced drag, configuration.

[0051] In particular embodiments, the plurality of doors may be pivotably coupled together, e.g. via one or more hinges.

[0052] In such embodiments, the doors may be configured and / or operable to fold in on themselves relative to a centreline of the enclosure, thereby pulling the side walls inwards and reconfiguring the enclosure to the second, drag-reducing, configuration.

[0053] Alternatively, the plurality of doors may be slidable relative to each other, e.g. via one or more slider, track or the like.

[0054] In such embodiments, the doors may be configured and / or operable to slide relative to each other so as to define the second, reduced width, configuration, thereby pulling the side walls inwards and reconfiguring the enclosure to the second, dragreducing, configuration.

[0055] Alternatively, or additionally, the rear door arrangement may comprise or take the form of a barn door arrangement. The enclosure may comprise at least one rear door lock arrangement. The enclosure may comprise a plurality of rear door lock arrangements. At least one of the rear door lock arrangements may be coupled to and / or operatively associated with a corresponding one of the doors of the rear door arrangement.

[0056] Alternatively, or additionally, at least one of the rear door lock arrangements may be integrally formed with a corresponding one of the doors of the rear door arrangement.

[0057] At least one of the rear door lock arrangements may comprise a lever. At least one of the rear door lock arrangements may comprise a rod. The lever may be coupled to and / or operatively associated with the rod. The lever may be rigidly coupled to the rod. The lever may be bonded to the rod. The rod may be received within a corresponding one of the doors of the rear door arrangement. The rod may run through a corresponding one of the doors of the rear door arrangement in the longitudinal direction.

[0058] The lever may be actuated so as to lock a corresponding one of the doors of the rear door arrangement in position. The lever may be actuated so as to lock a corresponding one of the doors of the rear door arrangement in position in the first, closed configuration.

[0059] The lever may be actuated so as to unlock a corresponding one of the doors of the rear door arrangement. The lever may be actuated so as to unlock a corresponding one of the doors of the rear door arrangement in the first, closed, configuration.

[0060] 55739168-1 In use, the lever may be actuated so as to unlock a corresponding one of the doors so as to permit said door to be moved out of position.

[0061] The lever may be actuated so as to facilitate reconfiguration of the rear door arrangement between the first, closed, configuration and the second, open, configuration.

[0062] The corresponding one of the doors may be permitted to rotate outwards through 270 degrees or substantially 270 degrees. The corresponding one of the doors may be permitted to rotate outwards through 270 degrees or substantially 270 degrees so as to facilitate reconfiguration of the rear door arrangement from the first, closed, configuration to the second, open, configuration.

[0063] The lever may be actuated so as to lock a corresponding one of the doors of the rear door arrangement in position in the second, open, configuration.

[0064] Each of the rear door lock arrangements of the enclosure may be configured as described herein.

[0065] Each of the doors of the plurality of doors may be coupled to and / or operatively associated with a corresponding rear door lock arrangement as described herein.

[0066] Alternatively, or additionally, the rear door arrangement may comprise a single door. The rear door arrangement may be reconfigurable between a first, closed, configuration and a second, open, configuration. The rear door arrangement may be configured in the first, closed, configuration in the first configuration. The rear door arrangement may be configured in the second, open, configuration in the second, reduced drag, configuration.

[0067] The rear door arrangement may be configured and / or operable to move, e.g. slide, axially, i.e. along the longitudinal axis of the enclosure.

[0068] Beneficially, this facilitates the overall length of the enclosure to be reduced injourney, e.g. after a given delivery or after the entire contents of the enclosure have been delivered. This in turn may further improve aerodynamic performance.

[0069] The enclosure may comprise a rear door adjustment arrangement for moving, e.g. sliding, the rear door. The rear door adjustment arrangement may comprise or take the form a belt drive, rail and / or gearing mechanism.

[0070] As described above, the enclosure is reconfigurable between a first configuration and a second, drag-reducing, configuration.

[0071] The enclosure may comprise a base or floor.

[0072] The enclosure may comprise a roof.

[0073] The roof of the enclosure may comprise a receiving portion.

[0074] 55739168-1 As described above, the rear door arrangement may comprise a single door.

[0075] The receiving portion of the roof may be configured and / or operable to receive the door therein. The door may be configured and / or operable to slide upwards relative to the floor of the enclosure.

[0076] In use, the door may be configured and / or operable to slide upwards relative to the floor of the enclosure so as to be received within the receiving portion. The door may be positioned parallel relative to the roof of the enclosure having been received within the receiving portion.

[0077] As described above, the rear door arrangement may be reconfigurable between a first, closed, configuration and a second, open, configuration.

[0078] The receiving portion of the roof may be configured and / or operable to receive the door therein in the second, open, configuration.

[0079] The door may comprise or take the form of a shutter door.

[0080] As described above, the enclosure may comprise an adjustment arrangement. The adjustment arrangement may comprise an actuation arrangement.

[0081] The adjustment arrangement may be coupled to and / or operatively associated with the roof of the enclosure. The actuation arrangement may be coupled to and / or operatively associated with the roof of the enclosure.

[0082] Alternatively, or additionally, the adjustment arrangement may be coupled to and / or operatively associated with the base or floor of the enclosure. The actuation arrangement may be coupled to and / or operatively associated with the base or floor of the enclosure.

[0083] The roof of the enclosure may be reconfigurable.

[0084] In some embodiments, the roof of the enclosure may comprise or take the form of a corrugated structure. In such embodiments, the roof made be constructed from a flexible material, e.g. a re-enforced fibre composite, a rubber or a flexible plastic material, that can fold when the shape of the enclosure is transformed.

[0085] In other embodiments, the roof of the enclosure may comprise a fabric layer. In such embodiments, the fabric layer may be configured and / or operable to cover the top of the enclosure.

[0086] The fabric layer may also extend down the side walls of the enclosure. The fabric layer may be secured to the base or floor of the enclosure. The fabric layer may directly engage the base or floor of the enclosure or may be secured via a lashing arrangement and / or ratchet strap arrangement or the like.

[0087] 55739168-1 In some embodiments, the fabric layer may be maintained in tension in use.

[0088] Beneficially, maintaining the fabric layer in tension facilitates the formation of a sealed enclosure, which is beneficial both in terms of maintaining the condition of the goods being transported but also in terms of the aerodynamic performance of the structure.

[0089] Alternatively, or additionally, the roof of the enclosure may comprise or take the form of a rigid structure.

[0090] The enclosure may comprise a support structure. The roof of the enclosure may comprise or take the form of a support structure. The support structure may be configured and / or operable to provide lateral stiffness to the enclosure. The support structure may be configured and / or operable to provide lateral stiffness to the rear of the enclosure. The support structure may comprise or take the form of a cross-braced roof structure.

[0091] In some embodiments, the enclosure may be configured and / or operable so that the side walls can be tapered inwards from discrete points along the length of the enclosure.

[0092] The enclosure may comprise or take the form of a rigid body enclosure. With the rigid body enclosure, the point at which the side wall tapers inwards will be via discrete positions.

[0093] At least one of the side walls of the enclosure may be rotatably coupled to the floor and / or the roof thereof. At least one of the side walls may be rotatably coupled to the floor and / or the roof by means of a hinged pivot.

[0094] Alternatively, or additionally, at least one of the side walls of the enclosure may comprise one or more side wall sections. At least one of the side walls of the enclosure may comprise a plurality of side wall sections.

[0095] Each of the side walls of the enclosure may comprise one or more side wall sections. Each of the side walls of the enclosure may comprise a plurality of side wall sections.

[0096] At least one of the side wall sections may comprise or take the form of a rigid section. Each of the side wall sections may comprise or take the form of a rigid section.

[0097] At least one of the side wall sections may be rotatably coupled to the floor and / or the roof of the enclosure. At least one of the side wall sections may be rotatably coupled to the floor and / or the roof by means of a hinged pivot.

[0098] 55739168-1 Each of the side wall sections may be rotatably coupled to the floor and / or the roof of the enclosure. Each of the side wall sections may be rotatably coupled to the floor and / or the roof by means of a hinged pivot.

[0099] At least two of the side wall sections may be rotatably coupled to each other. At least two of the side wall sections may be rotatably coupled to each other by means of a hinged pivot.

[0100] Each of the side wall sections may be rotatably coupled to the other. Each of the side wall sections may be rotatably coupled to the other by means of a hinged pivot.

[0101] At least one of the side wall sections may be rotatably coupled to the floor and / or the roof and rotatably coupled to another of the side wall sections by means of the same hinged pivot.

[0102] The enclosure may comprise one or more hinged pivot lock arrangements. The at least one hinged pivot lock arrangement may be coupled to and / or operatively associated with a hinged pivot of a respective one of the side wall sections.

[0103] The enclosure may comprise a plurality of hinged pivot lock arrangements. Each of the hinged pivot lock arrangements may be coupled to and / or operatively associated with a hinged pivot of a respective one of the side wall sections.

[0104] At least one of the hinged pivot lock arrangements may be reconfigurable from a first, locked, configuration to a second, unlocked, configuration. Each of the hinged pivot lock arrangements may be reconfigurable from a first, locked, configuration to a second, unlocked, configuration.

[0105] In use, having reconfigured the rear door arrangement from the first, closed, configuration to the second, open, configuration, the hinged pivot lock arrangement coupled to and / or operatively associated with the hinged pivot of a selected one of the side wall sections is reconfigured from the first, locked, configuration to the second, unlocked, configuration. The side wall of the enclosure comprising said side wall section is thus rotatable about said hinged pivot in the second, unlocked, configuration for the purposes of tapering said side wall inwards at a discrete point along the associated enclosure in the longitudinal direction corresponding to the position of said hinged pivot. Having sufficiently tapered said side wall inwards as described, said hinged pivot is then reconfigured from the second, unlocked, configuration to the first, locked, configuration. In this manner, the overall enclosure is reconfigurable from the first configuration to the second, reduced drag, configuration. Prior to the tapering of the associated side wall inwards as described, each of the side wall sections is aligned colinearly with the others in the first configuration of the enclosure, each of the hinged pivot lock arrangements

[0106] 55739168-1 coupled to and / or operatively associated with the hinged pivots of each of the side wall sections, respectively, being configured in the first, locked, configuration whilst the enclosure is configured in the first configuration.

[0107] Beneficially, in order to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration, the ability to pivot a particular side wall section about an associated hinged pivot at a discrete point along the length of the enclosure enables the enclosure to be so reconfigured relative to the amount of cargo load which remains to be delivered. As the cargo load is progressively lessened, a hinged pivot of a side wall section located further along the length of the enclosure can be selected for unlocking, thus facilitating the tapering of the associated side wall at a point further along the length of the enclosure relative to the amount of cargo load remaining, thus minimising the volume of “dead space” contained within the enclosure as the cargo load is lessened, improving fuel economy, and in turn efficacy of road transport and environmental benefit. In order words, the plurality of side wall sections as described permits the tapering geometry to be adjusted relative to the cargo load distribution, permitting optimisation of the configuration of the enclosure for differing loading conditions.

[0108] Moreover, by way of tapering the side wall of the enclosure inwards, the plurality of side wall sections beneficially reduces the level of jack-knifing required to be reached during the completion of a reverse manoeuvre in order to permit the driver of a goods vehicle to view the rear of the enclosure. In other words, the further along the longitudinal axis relative to the rear of the enclosure that the tapering begins, the less the enclosure jack-knifes relative to the goods vehicle itself before the driver gains a clear view of the typical rear blind spot. As such, the plurality of side wall sections as described improves the safety and manoeuvrability with which a goods vehicle can be operated.

[0109] The roof of the enclosure may comprise one or more seat portions. At least one of the seat portions and the roof may be integrally formed. Each of the seat portions and the roof may be integrally formed. The roof of the enclosure may comprise a first seat portion. The roof of the enclosure may comprise a second seat portion. The first seat portion may be configured to receive a rigid member therein. The second seat portion may be configured to receive a rigid member therein. The rigid member may extend perpendicularly from the first seat portion having been received therein. The rigid member may extend perpendicularly from the second seat portion having been received therein. Alternatively, or additionally, the rigid member may comprise or take the form of an arcuate member. The first seat portion may be configured to receive a first end of the

[0110] 55739168-1 rigid member therein. The second seat portion may be configured to receive a second, opposite, end of the rigid member therein. A length of the first seat portion may be the same as the length of the enclosure. A length of the second seat portion may be the same as the length of the enclosure. A length of the rigid member may be the same as the width of the enclosure. The first seat portion may comprise or take the form of an I- beam. The second seat portion may comprise or take the form of an I-beam.

[0111] Alternatively, or additionally, the first seat portion and the rigid member may be integrally formed. The second seat portion and the rigid member may be integrally formed.

[0112] As described above, at least one of the side walls of the enclosure may be rotatably coupled to the floor and / or the roof thereof. At least one of the side walls may be rotatably coupled to the floor and / or the roof by means of a hinged pivot.

[0113] A first side wall may be rotatably coupled to the first seat portion. A second side wall may be rotatably coupled to the second seat portion.

[0114] At least one of the side walls may be movably coupled to the rigid member. At least one of the side walls may be movably coupled to the rigid member by means of a roller arrangement. The roller arrangement may be coupled to and / or operatively associated with the top portion of the at least one side wall. The roller arrangement may be coupled to and / or operatively associate with a top portion of the rigid member. The roller arrangement may comprise or take the form of one or more rollers. The roller arrangement may comprise or take the form of a double roller carriage.

[0115] Alternatively, or additionally, the enclosure may comprise a hangar rail.

[0116] The hangar rail may be positioned between at least one of the side walls and the roof. The hangar rail may be positioned between each of the side walls and the roof.

[0117] As described above, the roof of the enclosure may comprise a receiving portion.

[0118] The hangar rail may be positioned between at least one of the side walls and the receiving portion. The hangar rail may be positioned between each of the side walls and the receiving portion.

[0119] As is also described above, the receiving portion of the roof may be configured and / or operable to receive the door therein in the second, open, configuration.

[0120] The hangar rail may be positioned between at least one of the side walls and the door in the second, open, configuration. The hangar rail may be positioned between each of the side walls and the door in the second, open, configuration.

[0121] Alternatively, or additionally, the hangar rail and the roof of the enclosure may be integrally formed.

[0122] 55739168-1 The hangar rail may be configured and / or operable to support at least one of the side walls. The hangar rail may be configured and / or operable to support at least one of the side walls as said side wall is pulled inwards. The hangar rail may be configured and / or operable to support at least one of the side walls as said side wall is pushed outwards. The hangar rail may be configured and / or operable to support each of the side walls as described herein.

[0123] The hangar rail may comprise at least one roller wheel. The hangar rail may comprise a plurality of roller wheels. At least one of the roller wheels may be coupled to and / or operatively associated with a corresponding one of the side walls. At least one of the roller wheels may be coupled to and / or operatively associated with the top portion of a corresponding one of the side walls. At least one of the roller wheels may be received through the hangar rail. At least one of the roller wheels may contact a top surface of the hangar rail. The hangar rail may comprise a track. The track may be curved or substantially curved. At least one of the roller wheels may be configured and / or operable to roll along the track. The hangar rail may be configured and / or operable to facilitate suspension of one or more of the side walls above the floor of the enclosure.

[0124] In use, each of the roller wheels of the hangar rail coupled to and / or operatively associated with a corresponding one of the side walls may roll along the track so as to guide the direction in which said side walls are either pulled inwards or pushed outwards for the purposes of reconfiguration of the enclosure from the first configuration to the second, reduced drag, configuration.

[0125] Beneficially, the hangar rail provides a low friction means by which the side walls may be pulled inwards as well as pushed outwards by way of facilitating the suspension of the side walls above the floor of the enclosure.

[0126] The enclosure may comprise at least one side wall lock arrangement. The enclosure may comprise a plurality of side wall lock arrangements

[0127] At least one of the side wall lock arrangements may comprise one or more mechanical linkages. At least one of the side wall lock arrangements may comprise one or more pins. The one or more mechanical linkages of the at least one side wall lock arrangement may be coupled to and / or operatively associated with the one or more pins. At least one of the pins of the at least one side wall lock arrangement may be coupled to and / or operatively associated with a corresponding one of the side walls. At least one of the pins may be coupled to and / or operatively associated with said corresponding side wall towards the top portion of said side wall. At least one of the pins may be coupled to

[0128] 55739168-1 and / or operatively associated with said corresponding side wall towards a bottom portion of said side wall.

[0129] At least one of the side wall lock arrangements may be actuated by means of a handle. The handle may be located towards the rear of the corresponding side wall.

[0130] In use, the handle may be accessible to an operator by way of the rear door arrangement. By way of actuation of the handle, the pins may be extended or retracted in order to either lock the side wall in position or to unlock the side wall so as to move the side wall out of position.

[0131] Each of the side wall lock arrangements of the enclosure may be configured as described herein.

[0132] Each of the side walls of the enclosure may be coupled to and / or operatively associated with a respective side wall lock arrangement.

[0133] As described above, the enclosure may comprise a base or floor.

[0134] The enclosure may comprise one or more cover arrangements.

[0135] At least one of the cover arrangements may be positioned between the base or floor and the roof of the enclosure.

[0136] The at least one cover arrangement may comprise one or more panels. The at least one cover arrangement may comprise a plurality of panels. The at least one cover arrangement may comprise two panels.

[0137] The at least one cover arrangement may comprise a first panel. The first panel may comprise a first side. The first panel may comprise a second side.

[0138] The at least one cover arrangement may comprise a second panel, The second panel may comprise a first side. The second panel may comprise a second side.

[0139] At least one of the panels may be coupled to and / or operatively associated with the base or floor.

[0140] The first side of the first panel may be coupled to and / or operatively associated with the base or floor. The first side of the first panel may be hingedly coupled to the base or floor.

[0141] At least one of the panels may be coupled to and / or operatively associated with another of the panels.

[0142] The second side of the first panel may be coupled to and / or operatively associated with the first side of the second panel. The second side of the first panel may be hingedly coupled to the first side of the second panel,

[0143] At least one of the panels may be coupled to and / or operatively associated with a corresponding one of the side walls of the enclosure.

[0144] 55739168-1 The second side of the second panel may be coupled to and / or operatively associated with a corresponding one of the side walls of the enclosure. The second side of the second panel may be hingedly coupled to a corresponding one of the side walls.

[0145] At least one of the panels may be coupled to and / or operatively associated with the bottom portion of a corresponding one of the side walls of the enclosure.

[0146] The second side of the second panel may be coupled to and / or operatively associated with the bottom portion of a corresponding one of the side walls. The second side of the second panel may be hingedly coupled to the bottom portion of a corresponding one of the side walls.

[0147] The at least one cover arrangement may be reconfigurable between a first, folded, configuration and a second, unfolded, configuration.

[0148] The at least one cover arrangement may be configured and / or operable to cover at least a portion of the base or floor of the enclosure. The at least one cover arrangement may be configured and / or operable to cover at least a portion of the base or floor in the second, unfolded, configuration.

[0149] The at least one cover arrangement may be reconfigured from the first, folded, configuration to the second, unfolded, configuration by way of pulling the corresponding side wall inwards.

[0150] The at least one cover arrangement may be reconfigured from the second, unfolded, configuration to the first, folded, configuration by way of pushing the corresponding side wall outwards.

[0151] Each of the cover arrangements of the enclosure may be configured as described herein.

[0152] Each of the cover arrangements of the enclosure may be coupled to and / or operatively associated with a corresponding one of the side walls as described herein.

[0153] In use, as the enclosure is reconfigured from the first configuration to the second, reduced drag, configuration (by way of pulling the side walls inwards), the corresponding cover arrangements are reconfigured from the first, folded, configuration to the second, unfolded, configuration in which the cover arrangements cover those portions of the base or floor which would otherwise have been exposed to the surrounding environment following said reconfiguration of the enclosure. Subsequently, as the enclosure is reconfigured from the second, reduced drag, configuration to the first configuration (by way of pushing the side walls outwards), the corresponding cover arrangements are reconfigured from the second, unfolded, configuration to the first, folded, configuration.

[0154] 55739168-1 Beneficially, reconfiguration of the cover arrangements from the first, folded, configuration to the second, unfolded, configuration so as to cover respective portions of the base or floor of the enclosure in the second, reduced drag, configuration protects said portions of the base or floor from harmful (e.g. wet) weather conditions to which said portions would otherwise be exposed. In doing so, the base or floor remains unaffected by said weather conditions (e.g. remains dry), ensuring that the base or floor is in a condition to receive cargo thereon following reconfiguration of the enclosure from the second, reduced drag, configuration to the first configuration.

[0155] Alternatively, the enclosure may be configured and / or operable so that the side walls can be tapered inwards at any point along the length of the enclosure.

[0156] The enclosure may comprise or take the form of a curtain-sider or other non-rigid enclosure.

[0157] Due to the nature of a curtain-sider, the fabric like structure of the curtain-sider allows the tapering to begin at any chosen point along the length of the enclosure.

[0158] The curtain-sider or non-rigid enclosure may comprise at least one back post. The curtain-sider or non-rigid enclosure may comprise a plurality of back posts. For example, the curtain-sider or non-rigid enclosure may comprise two back posts.

[0159] A first of the back posts may be coupled to and / or operatively associated with a first side of the curtain-sider or a first non-rigid side wall. A second of the back posts may be coupled to and / or operatively associated with a second side of the curtain-sider or a second non-rigid side wall.

[0160] In the first configuration of the enclosure, at least one of the back posts may be coplanar with the rear door arrangement. In the first configuration of the enclosure, each of the back posts may be coplanar with the rear door arrangement.

[0161] At least one of the back posts may be translatable in a width direction of the enclosure. Each of the back posts may be translatable in a width direction of the enclosure.

[0162] At least one of the back posts may be translatable so as to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration. At least one of the back posts may be translatable in the width direction so as to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration.

[0163] Each of the back posts may be translatable so as to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration. Each of the back posts may be translatable in the width direction so as to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration.

[0164] 55739168-1 As described above, the rear door arrangement may be configured and / or operable to move, e.g. slide, axially, i.e. along the longitudinal axis of the enclosure.

[0165] As is also described above, the enclosure may comprise a rear door adjustment arrangement for moving, e.g. sliding, the rear door. The rear door adjustment arrangement may comprise or take the form a belt drive, rail and / or gearing mechanism.

[0166] In use, where the enclosure is a curtain-sider or non-rigid enclosure, sliding of the rear door arrangement axially along the longitudinal axis of the enclosure permits each side of the curtain-sider or each non-rigid side wall to be tapered by way of translation of the associated back posts in the width direction of the enclosure. As the back post of an associated side of the curtain-sider or an associated non-rigid side wall is translated along the width direction following sliding of the rear door arrangement as described, said side of the curtain-sider or said non-rigid side wall bends around the rear door arrangement at whichever point along the length of the enclosure the rear door arrangement has come to rest, said side thus tapering towards the translated back post. In having slid the rear door arrangement and translated the back posts as described, the enclosure has been reconfigured from the first configuration to the second, reduced drag, configuration.

[0167] Beneficially, this ability to control the taper of the sides of the curtain-sider or the non-rigid side walls by way of translation of the associated back posts facilitates control of the angle at which the sides of the curtain-sider or the non-rigid side walls is tapered. By way of translating the back posts only partially along the width direction, the angle of the taper of the side walls can be maintained as shallow, thus reducing and / or mitigating the risk of any airflow stall.

[0168] Moreover, the ability to taper the sides of the curtain-sider or the non-rigid side walls as described permits the tapering of said sides at any point, i.e. continuously, along the longitudinal direction of the enclosure, rather than it being required that such tapering be performed at discrete points only. As such, the taper points need not be positioned along the longitudinal direction relative to standard pallet sizes and / or distributions, thus maximising the reduction of “dead space” possible by way of reconfiguration of the enclosure regardless of the size of cargo load / distribution thereof which remains onboard. In order words, the curtain-sider or non-rigid enclosure as described permits the tapering geometry to be adjusted relative to the cargo load distribution, permitting optimisation of the configuration of the enclosure for differing loading conditions.

[0169] In addition, by way of tapering one or each of the sides of the curtain-sider or the non-rigid side walls inwards as described, the curtain-sider or non-rigid enclosure as

[0170] 55739168-1 described beneficially reduces the level of jack-knifing required to be reached during the completion of a reverse manoeuvre in order to permit the driver of a goods vehicle to view the rear of the enclosure. In other words, the further along the longitudinal axis relative to the rear of the enclosure that the tapering begins, the less the enclosure jackknifes relative to the goods vehicle itself before the driver gains a clear view of the typical rear blind spot. As such, the curtain-sider or the non-rigid enclosure as described improves the safety and manoeuvrability with which a goods vehicle can be operated.

[0171] The tapering of the side walls of the curtain-sider or the non-rigid enclosure as described improves the ability of the enclosure to deflect airflow during strong crosswinds, thus reducing and / or mitigating any associated risk of the enclosure / the goods vehicle overturning. In instances where the enclosure has become lighter or only partially loaded, the reduction and / or mitigation of the risk of overturning is particularly beneficial.

[0172] The height of at least part of the enclosure may be reconfigurable.

[0173] For example, the height of all or substantially all of the enclosure may be reconfigurable.

[0174] Alternatively, the height of part of the enclosure may be reconfigurable.

[0175] For example, the height of one or more of a rear portion, front portion and / or middle portion of the enclosure may be reconfigurable.

[0176] The height of the rear portion, front portion and / or middle portion may be reconfigurable independently. Alternatively, the height of two or more of the rear portion, front portion and / or middle portion may be reconfigurable together.

[0177] The height of the enclosure, or one or more of the rear portion, front portion and / or middle portion of the enclosure, may be configurable from a nominal height to an increased height, so as to define an increased e.g. maximum, capacity configuration.

[0178] The height of the enclosure may be reconfigurable between the nominal height and the increased height, i.e. from the nominal height to the increased height, and vice- versa.

[0179] Beneficially, the ability to adapt the height of the enclosure may facilitate more efficient use of the space and / or volume within the enclosure, with increased cargocarrying capacity when required. The height of the enclosure may be reconfigured - in this case increased - in-journey, e.g. permitting the vehicle to be reconfigured to take on cargo mid-journey.

[0180] Alternatively or additionally, the ability to adapt the height of the enclosure may allow the vehicle to take more a direct, e.g. optimised, route due to being able to pass

[0181] 55739168-1 underneath bridges; in turn leading to reduce time to destination and / or reduced fuel costs.

[0182] Moreover, the ability to adapt the height of the rear portion, front portion and / or middle portion may permit the shape of the upper surface of the enclosure to be adapted so as to define a curved, e.g. aerofoil, shape, thereby facilitating reduced drag and in turn greater fuel economy.

[0183] As described above, the load-carrying enclosure is reconfigurable between a first configuration and a second, reduced drag, configuration.

[0184] A height of at least part of the enclosure may also be reconfigurable so as to reduce drag. More particularly, the height of at least part of the enclosure, e.g. one or more of a rear portion, front portion and / or middle portion, of the enclosure, may be reduced.

[0185] The height of the enclosure, or one or more of the rear portion, front portion and / or middle portion of the enclosure, may be configurable between the nominal height and a reduced height, so as to define a reduced, e.g. minimum, capacity configuration.

[0186] The height of the enclosure, or one or more of the rear portion, front portion and / or middle portion of the enclosure, may be reconfigurable between the nominal height and a reduced height, i.e. from the nominal height to the reduced height, and vice-versa.

[0187] Beneficially, the ability to reconfigure the height of at least part of the enclosure may facilitate a further reduction in drag and / or improvement in aerodynamic performance and fuel economy, e.g. by reducing the frontal area of the enclosure and thereby reducing aerodynamic drag.

[0188] Moreover, the ability to adapt the height of the rear portion, front portion and / or middle portion may permit the shape of the upper surface of the enclosure to be adapted so as to define a curved, e.g. aerofoil, shape, thereby facilitating reduced drag and in turn greater fuel economy.

[0189] The reconfiguration in height may be achieved by a number of means.

[0190] The reconfiguration in height may be achieved via the moving and / or changing of the geometry of the rear door.

[0191] The enclosure may comprise a height adjustment arrangement.

[0192] The height adjustment arrangement may comprise a height actuation arrangement.

[0193] The height actuation arrangement may be configured and / or operable to move, the roof of the enclosure.

[0194] 55739168-1 The height actuation arrangement may comprise one or more of: a fluid-powered actuation arrangement, e.g. a hydraulic actuation arrangement or a pneumatic actuation arrangement; an electric actuation arrangement; and a mechanical actuation arrangement.

[0195] The height actuation arrangement may comprise one or more actuators, e.g. linear actuators. The or each actuator may comprise or take the form of: a fluid-powered actuator, e.g. a hydraulic actuator or pneumatic actuator; an electric actuator; or a mechanical actuation arrangement.

[0196] Alternatively, or additionally, the height actuation arrangement may comprise or take the form a belt drive.

[0197] Alternatively, or additionally, the height actuation arrangement may comprise or take the form of a screw drive actuation arrangement.

[0198] The enclosure may be configured to receive one or more platforms, in particular embodiments a plurality of platforms.

[0199] The platforms may be configured and / or operable to receive cargo.

[0200] The height of one or more of the platforms may be adjustable. For example, the platforms may comprise telescopic legs or may be mounted on rails which permit the platforms to be moved up and / or down.

[0201] At least one of the side walls of the enclosure may comprise one or more ribs.

[0202] At least one of the side walls of the enclosure may comprise a plurality of ribs.

[0203] The one or more ribs may extend from the at least one side wall. The one or more ribs may extend from an exterior surface of the at least one side wall.

[0204] Each of the plurality of ribs may be separated by a gap positioned therebetween. Each of the plurality of ribs may be separated by a gap positioned therebetween along the longitudinal axis of the enclosure.

[0205] The plurality of ribs may comprise or take the form of a stepped configuration.

[0206] At least one of the one or more ribs may extend perpendicular or substantially perpendicular to the at least one side wall. At least one of the one or more ribs may extend perpendicular or substantially perpendicular to the exterior surface of the at least one side wall.

[0207] Alternatively, or additionally, at least one of the one or more ribs may extend parallel or substantially parallel to the at least one side wall. At least one of the one or more ribs may extend parallel or substantially parallel to the exterior surface of the at least one side wall.

[0208] 55739168-1 Alternatively, or additionally, at least one of the one or more ribs may extend diagonally, e.g. at an acute angle, with respect to the at least one side wall. At least one of the one or more ribs may extend diagonally, e.g. at an acute angle, with respect to the exterior surface of the at least one side wall. For example, the plurality of ribs may extend from the at least one side wall in an arrow or chevron configuration. The plurality of ribs may extend from the exterior surface of the at least one side wall in an arrow or chevron configuration.

[0209] Beneficially, having the one or more ribs extending perpendicularly or substantially perpendicular, parallel or substantially parallel, or diagonally (e.g. at an acute angle) to the at least one side wall may further enhance flow mixing.

[0210] In use, as air flows along the exterior surface of the side wall of the enclosure, vortices form in the gaps provided between each of the ribs extending from said exterior surface. By way of the formation of said vortices, a low-pressure zone is formed within each of said gaps, with said vortices mixing with and reenergising said flow of air all along the length of the enclosure.

[0211] Beneficially, by way of re-energising the flow of air as described, the plurality of ribs reduces and / or mitigates the effects of any drag-inducing boundary layer which might otherwise form along the exterior surface of the side wall of the enclosure. For example, as the vortices mix air whilst it flows along the exterior surface of the enclosure, the drag-inducing boundary layer is prevented from forming consistently. Having reduced and / or mitigated the effects of said drag-inducing boundary layer, any angle at which the at least one side wall is tapered can be increased, leading to a reduction of the drag to which the enclosure is subjected.

[0212] Moreover, the plurality of ribs reduces and / or mitigates the surface-to-air contact time associated with airflow along the exterior surface of the side wall, thus reducing and / or mitigating the effects of any associated skin friction.

[0213] At least one of the one or more ribs may be coupled to and / or operatively associated with a blowing arrangement.

[0214] At least one of the one or more ribs may comprise a distal end. The distal end may be coupled to and / or operatively associated with the blowing arrangement.

[0215] The blowing arrangement may be coupled to and / or operatively associated with an air compressor system. The blowing arrangement may be coupled to and / or operatively associated with an air compressor system of the goods vehicle.

[0216] 55739168-1 The blowing arrangement may comprise one or more channels. At least one of the channels may be formed within a respective rib. At least one of the channels may be in fluid communication with the air compressor system.

[0217] In use, the air compressor system of the goods vehicle, which is driven directly by the engine thereof and sends air typically to the braking system of the enclosure, is utilised by the blowing arrangement in order to blow air out of a single channel formed in each of the respective ribs.

[0218] Beneficially, the blowing arrangement facilitates the reattachment of the airflow at any point along the exterior surface of the respective sidewalls, improving the aerodynamic efficiency of the overall enclosure.

[0219] The blowing arrangement may comprise, may be coupled to or operatively associated with a control system. The blowing arrangement may comprise one or more sensors. At least one of the sensors of the blowing arrangement may comprise or take the form of an air-pressure sensor. At least one of the sensors may be disposed on a side wall of the enclosure. At least one of the sensors may be disposed on the exterior surface of the side wall.

[0220] At least one of the sensors may be operatively associated with the control system.

[0221] In use, the control system of the blowing arrangement may be linked to the air- pressure sensors thereof, a plurality of which are disposed on an exterior surface of each of the respective side walls of the enclosure. As these air-pressure sensors indicate the detachment of airflow from the exterior surface, the control system operates to active the blowing arrangement, causing air to be blown from the channels formed in each of the respective ribs.

[0222] At least one of the one or more ribs may be coupled to and / or operatively associated with a suction arrangement.

[0223] At least one of the one or more ribs may comprise a proximal end. The proximal end may be coupled to and / or operatively associated with the suction arrangement.

[0224] In use, the operation of blowing and suction arrangements coupled to and / or operatively associated with the distal and proximal ends, respectively, of each of the ribs enhances the power of the vortices produced in the gaps separating each of said ribs.

[0225] Beneficially, the blowing and suction arrangements as described further reduce and / or mitigate the effects of any drag-inducing boundary layer which might otherwise form along the exterior surface of the side wall of the enclosure. For example, as the mixing of the air by the vortices whilst it flows along the exterior surface of the enclosure

[0226] 55739168-1 is enhanced, the drag-inducing boundary layer is further prevented from forming consistently. Having further reduced and / or mitigated the effects of said drag-inducing boundary layer, any angle at which the associated side wall is tapered can be further increased, leading to a further reduction of the drag to which the enclosure is subjected.

[0227] The suction arrangement may be coupled to and / or operatively associated with an air compressor system. The suction arrangement may be coupled to and / or operatively associated with an air compressor system of the goods vehicle.

[0228] The suction arrangement and the blowing arrangement may be coupled to and / or operatively associated with the same air compressor system.

[0229] The suction arrangement may comprise one or more channels. At least one of the channels may be formed within a respective rib. At least one of the channels may be in fluid communication with the air compressor system.

[0230] In use, the air compressor system of the goods vehicle, which is driven directly by the engine thereof and sends air typically to the braking system of the enclosure, is utilised by the suction arrangement in order to draw air into a single channel formed in each of the respective ribs.

[0231] The suction arrangement may comprise, may be coupled to or operatively associated with a control system. The suction arrangement may comprise one or more sensors. At least one of the sensors of the suction arrangement may comprise or take the form of an air-pressure sensor. At least one of the sensors may be disposed on a side wall of the enclosure. At least one of the sensors may be disposed on the exterior surface of the side wall.

[0232] The suction arrangement and the blowing arrangement may comprise, may be coupled to or operatively associated with the same control system. The suction arrangement and the blowing arrangement may comprise the same one or more sensors.

[0233] At least one of the sensors of the suction arrangement may be operatively associated with the control system of the suction arrangement.

[0234] In use, the control system of the suction arrangement is linked to the air-pressure sensors thereof, a plurality of which are disposed on an exterior surface of each of the respective side walls of the enclosure. As these air-pressure sensors indicate the detachment of airflow from the exterior surface, the control system operates to active the suction arrangement, causing air to be drawn into the channels formed in each of the respective ribs.

[0235] 55739168-1 Beneficially, the suction arrangement facilitates the reattachment of the airflow at any point along the exterior surface of the respective sidewalls, improving the aerodynamic efficiency of the overall enclosure.

[0236] Each of the side walls of the enclosure may comprise one or more ribs as described.

[0237] Each of the plurality of ribs may extend from the at least one side wall as described.

[0238] At least one of the side walls of the enclosure may comprise or take the form of a composite arrangement. At least part of at least one of the side walls may comprise or take the form of a composite arrangement. For example, a strip of at least one of the side walls may comprise or take the form of a composite arrangement.

[0239] As described above, at least one of the side walls of the enclosure may comprise one or more side wall sections.

[0240] At least one of the side wall sections may comprise or take the form of a composite arrangement. At least part of at least one of the side wall sections may comprise or take the form of a composite arrangement. For example, a strip of at least one of the side wall sections may comprise or take the form of a composite arrangement.

[0241] The composite arrangement may comprise one or more composite structures. The composite arrangement may comprise a plurality of composite structures. For example, the composite arrangement may comprise two composite structures.

[0242] At least one of the composite structures may comprise or take the form of a multiply composite structure. For example, at least one of the composite structures may comprise or take the form of a two-ply composite structure.

[0243] At least one of the composite structures may comprise at least one reinforced portion. At least one of the composite structures may comprise a plurality of reinforced portions.

[0244] At least one of the reinforced portions may comprise or take the form of a multiply structure. For example, at least one of the reinforced portions may comprise or take the form of a three-ply structure.

[0245] At least one of the reinforced portions may extend from the composite structure. At least one of the reinforced portions may extend from an exterior surface of the composite structure.

[0246] Each of the composite structures may be configured as described.

[0247] Each of the reinforced portions may be configured as described.

[0248] 55739168-1 The composite arrangement may comprise a core.

[0249] The core may be disposed between a first composite structure and a second composite structure.

[0250] The core may comprise at least one reinforced portion. The core may comprise a plurality of reinforced portions.

[0251] The core may comprise or take the form of a foam structure.

[0252] At least one of the reinforced portions of the core may comprise or take the form of a high-density foam structure.

[0253] Each of the reinforced portions of the core may be configured as described.

[0254] At least one of the reinforced portions of at least one of the composite structures may be aligned or substantially aligned with a corresponding one of the reinforced portions of the core.

[0255] At least one of the reinforced portions of a first of the composite structures may be aligned or substantially aligned with a corresponding one of the reinforced portions of a second of the composite structures.

[0256] The composite arrangement may comprise or take the form of a high-load bearing area of the side wall.

[0257] At least one of the reinforced portions of the first composite structure, the second composite structure and / or the core may be aligned or substantially aligned with a high- load bearing area of the side wall.

[0258] Each of the reinforced portions of the first composite structure, the second composite structure and the core may be aligned or substantially aligned with a high- load bearing area of the side wall.

[0259] In use, a strip of the side wall comprises or takes the form of the composite arrangement, the foam core is disposed between a first, two-ply composite structure and a second, two-ply composite structure so as to form the stripped composite arrangement of the side wall. Each of the foam core, the first composite structure and the second composite structure has two reinforced portions. The first reinforced portion of the core is aligned with the first reinforced portion of the first and second composite structures, and the second reinforced portion of the core is aligned with the second reinforced portion of the first and second composite structures. This stripped composite arrangement is positioned, and thus alignment of the reinforced portions occurs, at those positions throughout the side wall which bear the highest load, e.g. those positions at which cargo rails are coupled to and / or operatively associated with said side wall.

[0260] 55739168-1 Beneficially, the inclusion of targeted reinforcement zones at key structural areas throughout the side walls as described permits the overall composite ply thickness (outwith said reinforcement zones) of these side walls to be reduced, thus reducing the overall weight of said side walls and any costs associated with the construction thereof. As such, any structural arrangements which are required to support these side walls and any actuation arrangements which are required to move these side walls may be reduced in complexity, increasing the overall efficiency with which the enclosure is operated and reducing any associated inertia. Moreover, reducing the weight of the side walls as described improves the overall fuel efficiency of any associated goods vehicle and / or enables an increased payload capacity. In addition, the overall strength-to-weight ratio of the side walls is increased.

[0261] It is also noted that, where these composite arrangements comprise or take the form of stripped portions of the respective side walls, any loads exerted on the key structural areas in which said stripped composite arrangements are positioned may be directed longitudinally along the enclosure.

[0262] As described above, at least part of at least one of the side walls may comprise or take the form of a composite arrangement. For example, a strip of at least one of the side walls may comprise or take the form of a composite arrangement.

[0263] The composite arrangement may be disposed diagonally throughout the at least one side wall. For example, the composite arrangement may comprise or take the form of a diagonal strip disposed throughout the at least one side wall.

[0264] The composite arrangement may be disposed diagonally throughout at least one side wall section of the at least one side wall. For example, the composite arrangement may comprise or take the form of a diagonal strip disposed throughout the at least one side wall section.

[0265] Beneficially, the disposal of a stripped composite arrangement diagonally throughout the side walls reduces and / or mitigates the torsion to which the enclosure is subjected.

[0266] According to a second aspect, there is provided a vehicle comprising the trailer of the first aspect.

[0267] The goods vehicle may comprise or take the form of a heavy-goods vehicle, such as a truck, lorry or the like. Alternatively, the goods vehicle may comprise or take the form of a light-goods vehicle such as a van, cargo truck, or the like.

[0268] However, it will be understood that the enclosure may be utilised with any suitable vehicle having a load-carrying enclosure positioned behind the driver’s cab.

[0269] 55739168-1 As described above, the enclosure may comprise an adjustment arrangement. The adjustment arrangement may comprise an actuation arrangement.

[0270] The adjustment arrangement may be coupled to and / or operatively associated with a chassis of the vehicle. The actuation arrangement may be coupled to and / or operatively associated with the chassis of the vehicle.

[0271] As described above, the actuation arrangement may comprise one or more of: a fluid-powered actuation arrangement, e.g. a hydraulic actuation arrangement or a pneumatic actuation arrangement.

[0272] The actuation arrangement may be coupled to and / or operatively associated with a pressurised fluid supply of the vehicle.

[0273] Beneficially, the ability to connect the actuation arrangement to a pressurised fluid supply already comprised as part of the vehicle itself results in a reduction in the complexity of the structure of the vehicle with trailer attached, as well as any costs associated with the assembly thereof.

[0274] According to a third aspect, there is provided a method of transporting goods and / or cargo using the drag-reducing enclosure of the first aspect and / or the vehicle of the second aspect.

[0275] The invention is defined by the appended claims. However, for the purposes of the present disclosure it will be understood that any of the features defined above or described below may be utilised in isolation or in combination. For example, features described above in relation to one of the above aspects or below in relation to the detailed description below may be utilised in any other aspect, or together form a new aspect.

[0276] 55739168-1 BRIEF DESCRIPTION OF THE DRAWINGS

[0277] These and other aspects will now be described with reference to the accompanying drawings, in which:

[0278] Figure 1 shows a vehicle comprising a cargo-carrying enclosure according to the present disclosure, with the enclosure in its first configuration;

[0279] Figure 2 shows the vehicle shown in Figure 1 , with the enclosure in its second configuration;

[0280] Figure 3 shows air velocity over the enclosure in its first configuration;

[0281] Figure 4 shows air velocity over the enclosure in its second configuration;

[0282] Figures 5a to 5e show air velocity over the enclosure in its different configurations;

[0283] Figures 6 to 9 show a rear door arrangement of the enclosure;

[0284] Figure 10 shows a side wall of the enclosure movably coupled to a rigid member by means of a roller arrangement;

[0285] Figure 11 shows an alternative rear door arrangement;

[0286] Figure 12 shows an alternative enclosure having a rear portion with reduced height;

[0287] Figure 13 shows an example of a height adjustment arrangement of the enclosure shown in Figure 12, in a first configuration;

[0288] Figure 14 shows the height adjustment arrangement of the enclosure shown in Figure 12, in a second, reduced height, configuration;

[0289] Figure 15 shows a vehicle comprising a cargo-carrying enclosure according to the present disclosure, with the enclosure in its nominal height configuration;

[0290] Figure 16 shows the vehicle shown in Figure 15, with the enclosure in its increased height configuration;

[0291] Figure 17 shows the vehicle shown in Figure 15 & 16, with the enclosure in its reduced height configuration;

[0292] Figure 18 shows air velocity over the enclosure in the increased height configuration shown in Figure 16;

[0293] Figure 19 shows air velocity over the enclosure in the reduced height configuration shown in Figure 17;

[0294] Figure 20 shows a height adjustment arrangement of the enclosure shown in Figure 17, in a nominal height configuration;

[0295] Figure 21 shows the height adjustment arrangement shown in Figure 20, in a reduced height configuration;

[0296] 55739168-1 Figure 22 shows the height adjustment arrangement shown in Figure 20, in a increased height configuration;

[0297] Figure 23 shows a vehicle comprising an alternative cargo-carrying enclosure according to the present disclosure;

[0298] Figure 24 shows a height adjustment arrangement of the enclosure shown in Figure 23;

[0299] Figure 25 shows an alternative cargo-carrying enclosure in a first configuration;

[0300] Figure 26 shows the cargo-carrying enclosure of Figure 25 in a second, reduced drag, configuration;

[0301] Figure 27 shows the cargo-carrying enclosure of Figure 26 with the roof thereof removed;

[0302] Figure 28 shows the cargo-carrying enclosure of Figure 27 with the door thereof removed also;

[0303] Figure 29 shows a top view of the hangar rail of the cargo-carrying enclosure of Figure 25;

[0304] Figure 30 shows a bottom view of the cargo-carrying enclosure of Figure 27;

[0305] Figure 31 shows a top view of the cargo-carrying enclosure of Figure 28;

[0306] Figure 32 shows a top view of the adjustment arrangement of the cargo-carrying enclosure of Figure 25;

[0307] Figure 33 shows a side view of a side wall lock arrangement of the cargo-carrying enclosure of Figure 25;

[0308] Figure 34 shows a diagrammatic side view of the side wall lock arrangement of Figure 33;

[0309] Figure 35 shows a perspective view of the cargo-carrying enclosure of Figure 28;

[0310] Figure 36 shows a diagrammatic rear view of the cargo-carrying enclosure of Figure 35 during reconfiguration thereof from the second, reduced drag, configuration to the first configuration;

[0311] Figure 37 shows an alternative cargo-carrying enclosure in a first configuration;

[0312] Figure 38 shows the cargo-carrying enclosure of Figure 37 in a second, reduced drag, configuration;

[0313] Figure 39 shows a perspective view of a rear door lock arrangement of the cargocarrying enclosure of Figure 37 wherein the rear door arrangement is in a first, closed, configuration;

[0314] Figure 40 shows a perspective view of the rear door lock arrangement of Figure 39 wherein the rear door arrangement is in a second, open, configuration;

[0315] 55739168-1 Figure 41 shows an alternative cargo-carrying enclosure in a first configuration;

[0316] Figure 42 shows the cargo-carrying enclosure of Figure 41 in a second, reduced drag, configuration;

[0317] Figure 43 shows the cargo-carrying enclosure of Fig. 41 in a further second, reduced drag, configuration;

[0318] Figure 44 shows an alternative cargo-carrying enclosure in a first configuration;

[0319] Figure 45 shows the cargo-carrying enclosure of Figure 44 in a second, reduced drag, configuration;

[0320] Figure 46 shows the cargo-carrying enclosure of Fig. 44 in a further second, reduced drag, configuration;

[0321] Figure 47 shows the cargo-carrying enclosure of Fig. 44 in a further second, reduced drag, configuration;

[0322] Figure 48 shows the cargo-carrying enclosure of Fig. 47 in attachment to a goods vehicle in the process of reversing;

[0323] Figure 49 shows the side wall of an alternative cargo-carrying enclosure;

[0324] Figure 50 shows the side wall of an alternative cargo-carrying enclosure;

[0325] Figure 51 shows air velocity over the side wall of an alternative cargo-carrying enclosure;

[0326] Figure 52 shows air velocity over the side wall of an alternative cargo-carrying enclosure;

[0327] Figure 53 shows the interior of an alternative cargo-carrying enclosure;

[0328] Figure 54 shows a cross-sectional view of a portion of a side wall of the cargocarrying enclosure of Fig. 53;

[0329] Figure 55 shows a diagrammatic view of the blowing and suction arrangements of an alternative cargo-carrying enclosure; and

[0330] Figure 56 shows a diagrammatic view of one of the ribs of the cargo-carrying enclosure of Figure 55.

[0331] DETAILED DESCRIPTION OF THE DRAWINGS

[0332] Referring first to Figures 1 and 2 of the accompanying drawings, there is shown a goods vehicle, generally denoted 10, having a cab 12 and a drag-reducing enclosure, generally denoted 14, for carrying goods and / or cargo.

[0333] As shown in Figures 1 and 2, the vehicle 10 takes the form of a heavy-goods vehicle and the enclosure 14 comprises or takes the form of a trailer.

[0334] 55739168-1 However, it will be understood that the vehicle 10 and enclosure 14 may take a number of different suitable forms.

[0335] Figure 1 shows the enclosure 14 in a first configuration in which side walls 16 of the enclosure 14 are parallel or substantially parallel. Figure 2 shows the enclosure 14 in a second configuration in which the side walls 16 of the enclosure 14 are tapered inwards so as to reduce aerodynamic drag during transport.

[0336] In use, the enclosure 14 is configured in the first configuration when the enclosure 14 is full. The enclosure 14 may then be reconfigured to the second configuration injourney, e.g. after a given delivery or after the entire contents of the enclosure 14 have been delivered.

[0337] The enclosure 14 according to the present disclosure provides a number of significant benefits over conventional systems.

[0338] For example, when in the first configuration the enclosure 14 permits the amount of goods and / or cargo to be maximised, thereby maximising the amount of goods and / or cargo that can be can transported per journey. The enclosure 14 can be reconfigured when the enclosure 14 is not full and thus would otherwise contain “dead” space to the drag-reducing second configuration, thereby improving fuel economy, and in turn efficacy of road transport and environmental benefit.

[0339] Figures 3 and 4 and Figures 5a to 5e respectively show air velocity over the enclosure 14 in its first and second configurations.

[0340] Beneficially, the enclosure 14 according to the present disclosure can produce a decrease of up to 20% in aerodynamic drag, with the potential to reduce fuel consumption by 10 to 14%.

[0341] Referring now also to Figures 6 and 7 of the accompanying drawings, the enclosure 14 comprises a rear door arrangement, generally denoted 18.

[0342] The rear door arrangement 18 is configured and / or operable to facilitate reconfiguration of the enclosure 14 between its first configuration and its second configuration.

[0343] The rear door arrangement 18 is itself reconfigurable from a first configuration in which the rear door arrangement 18 has a first width and a second configuration in which the rear door arrangement 18 has a second, smaller, width.

[0344] The enclosure 14 may be reconfigurable from its first configuration to its second, drag-reducing, configuration by reconfiguring the rear door arrangement 18 from its first configuration to its second, reduced width, configuration.

[0345] As shown, the rear door arrangement 18 comprises a plurality of doors 20.

[0346] 55739168-1 In the illustrated rear door arrangement 18, the doors 20 are pivotably coupled together via hinges 22.

[0347] The doors 20 are configured and / or operable to fold in on themselves relative to a longitudinal axis X of the enclosure 14, thereby pulling the side walls 16 inwards and reconfiguring the enclosure 14 to the second, drag-reducing, configuration.

[0348] Referring now also to Figures 8 and 9 of the accompanying drawings, in the illustrated enclosure 14, the rear door arrangement 18 is also configured and / or operable to move, e.g. slide, axially, i.e. along the longitudinal axis X of the enclosure 14.

[0349] Beneficially, this facilitates the overall length of the enclosure 14 to be reduced in-journey, e.g. after a given delivery or after the entire contents of the enclosure 14 have been delivered. This in turn may further improve aerodynamic performance.

[0350] The enclosure 14 comprises a rear door adjustment arrangement, generally denoted 24, for moving, e.g. sliding, the rear door arrangement 18. The rear door adjustment arrangement 24 comprises or take the form a belt drive, rail and / or gearing mechanism.

[0351] Referring again to Figures 1 and 2, the enclosure 14 comprises a roof, generally denoted 26, which is reconfigurable in response to reconfiguration of the side walls 16 of the enclosure 14.

[0352] In the illustrated enclosure 14, the roof 26 comprises a fabric layer 28 configured and / or operable to cover the top of the enclosure 14.

[0353] The fabric layer 28 also extends down the side walls of the enclosure 14. The fabric layer 28 is secured to a base or floor 30 of the enclosure 14. The fabric layer 28 may directly engage the base or floor 30 of the enclosure 14 or may be secured via a lashing arrangement and / or ratchet strap arrangement or the like.

[0354] The fabric layer 28 is maintained in tension in use.

[0355] Beneficially, maintaining the fabric layer 28 in tension facilitates the formation of a sealed enclosure 14, which is beneficial both in terms of maintaining the condition of the goods and / or cargo being transported but also in terms of the aerodynamic performance of the structure.

[0356] Referring now to Figure 10 of the accompanying drawings, the illustrated roof 26 comprises a seat portion 56 in the form of an I-beam, from which a rigid member 58 extends perpendicularly, having been received therein. The side wall 16 of the enclosure 14 is rotatably coupled to the floor 30 thereof and to the seat portion 56 by means of a hinged pivot. A length of the illustrated seat portion 56 is the same as the length of the

[0357] 55739168-1 enclosure 14, and a length of the rigid member 58 is the same as the width of the enclosure 14. The side wall 16 is movably coupled to the rigid member 58 by means of a roller arrangement, generally denoted 60. The roller arrangement 60 is coupled to and / or operatively associated with a top portion 62 of the side wall 16 and a top portion 64 of the rigid member 58, wherein the roller arrangement 60 comprises or takes the form of a double roller carriage.

[0358] Various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0359] For example, Figure 11 of the accompanying drawings shows an alternative rear door arrangement, generally denoted 118. In the door arrangement 118, the plurality of doors 120 are slidable relative to each other, e.g. via one or more slider, track or the like 122.

[0360] In such embodiments, the doors 120 are configured and / or operable to slide relative to each other so as to define the second, reduced width, configuration, thereby pulling the side walls 16 inwards and reconfiguring the enclosure to the second, dragreducing, configuration.

[0361] In some embodiments, the roof of the enclosure may comprise or take the form of a corrugated structure. In such embodiments, the roof made be constructed from a flexible material, e.g. a re-enforced fibre composite, a rubber or a flexible plastic material, that can fold when the shape of the enclosure is transformed.

[0362] In some embodiments, the enclosure may be configured and / or operable so that the side walls can be tapered inwards from discrete points along the length of the enclosure.

[0363] The enclosure may comprise or take the form of a rigid body enclosure. With the rigid body enclosure, the point at which the side wall taper inwards will be via discrete positions.

[0364] Alternatively, the enclosure may be configured and / or operable so that the side walls can be tapered inwards at any point along the length of the enclosure.

[0365] The enclosure may comprise or take the form of a curtain-sider.

[0366] Due to the nature of a curtain-sider, the fabric like structure of the curtain-sider allows the tapering to begin at any chosen point along the length of the enclosure.

[0367] Figures 12, 13 & 14 of the accompanying drawings shows an alternative enclosure, generally denoted 214.

[0368] As shown in Figure 12, a height of at least part of the enclosure 214 is reconfigurable so as to reduce drag. More particularly, the height of a rear portion 232

[0369] 55739168-1 of the enclosure 214 is reconfigurable to a reduced height Hmin compared to a nominal height H nom of the enclosure 214.

[0370] Beneficially, the ability to reconfigure the height of at least part of the enclosure 214 may facilitate a further reduction in drag and / or improvement in aerodynamic performance and fuel economy.

[0371] The reconfiguration in height may be achieved via the moving and / or changing of the geometry of the rear door.

[0372] For example, as shown in Figures 13 & 14 of the accompanying drawings, the enclosure 214 has a door arrangement, generally denoted 218, having a plurality of doors 220. The plurality of doors 220 are slidable relative to each other, e.g. via one or more slider, track or the like 222, in a similar manner to the enclosure 114.

[0373] However, it will be understood that other arrangements for laterally reconfiguring the doors 220 may be provided, such as shown and described in relation to the enclosure 14.

[0374] In the illustrated enclosure 214, the enclosure 214 further comprises a height adjustment arrangement, generally denoted 234. Each door 220 has a first portion 236, which in the illustrated enclosure 214 forms an upper portion of each door 220, and a second portion 238, which in the illustrated enclosure 214 form a lower portion of each door 220.

[0375] In the illustrated enclosure 214, the first, upper, portion 236 is slidable relative to the second, lower, portion 238, e.g. via one or more slider, track or the like 240.

[0376] However, it will be understood that other arrangements may be provided. For example, the first, upper, portion 236 may be pivotable relative to the second, lower, portion 238, e.g. via a hinge or the like.

[0377] Figure 13 shows the height adjustment arrangement 234 of the enclosure 214, in a first configuration in which the enclosure 214 has the nominal height HnOm. Figure 14 shows the height adjustment arrangement 234 of the enclosure 214 in a second, reduced height, configuration having the reduced height Hmin.

[0378] Figures 15 to 21 of the accompanying drawings show a vehicle, generally denoted 310, comprising an alternative enclosure, generally denoted 314, in which the height of all or substantially all of the enclosure 314 is reconfigurable.

[0379] Figure 15 of the accompanying drawings shows the vehicle 310 with the enclosure 314 in a nominal height configuration in which the enclosure 310 has a nominal height HnOm.

[0380] 55739168-1 Figure 16 of the accompanying drawings shows the vehicle 310 with the enclosure in an increased height configuration in which the enclosure 310 has an increased height Hmax greater than the nominal height HnOm, with Figure 18 showing air velocity over the enclosure 314 in the increased height configuration shown in Figure 16.

[0381] Beneficially, the ability to adapt - in this configuration, increase - the height of the enclosure 314 facilitates more efficient use of the space and / or volume within the enclosure 314, with increased cargo-carrying capacity when required. The height of the enclosure 314 is reconfigurable - in this case increased - in-journey, e.g. permitting the vehicle 310 to be reconfigured to take on cargo mid-journey.

[0382] Alternatively or additionally, the ability to adapt the height of the enclosure 314 allows the vehicle 310 to take more a direct, e.g. optimised, route due to being able to pass underneath bridges; in turn leading to reduce time to destination and / or reduced fuel costs.

[0383] Figure 17 of the accompanying drawings shows the vehicle 310 with the enclosure 314 in its reduced height configuration in which the enclosure 310 has reduced height Hmin less than the nominal height HnOm, with Figure 19 showing air velocity over the enclosure 314 in the reduced height configuration shown in Figure 17.

[0384] Beneficially, the ability to reconfigure - in this configuration, reduce - the height of the enclosure 314 may facilitate a further reduction in drag and / or improvement in aerodynamic performance and fuel economy, e.g. by reducing the frontal area of the enclosure 314 (and / or the vehicle overall) and thereby reducing aerodynamic drag.

[0385] Figures 20, 21 & 22 of the accompanying drawings show an example height adjustment arrangement, generally denoted 342, of the enclosure 314.

[0386] As shown, the roof 326 of the enclosure 314 is coupled to a height actuation arrangement, generally denoted 344.

[0387] The height actuation arrangement 344 is configured and / or operable to move the roof 326 so as to reconfigure the height of the enclosure 314.

[0388] The height actuation arrangement 344 comprises a plurality of actuators 346. In the illustrated enclosure 314, the height actuation arrangement 344 comprises or takes the form of a hydraulic actuation arrangement and the actuators 346 are hydraulic actuators.

[0389] However, it will be understood that the height actuation arrangement 344 may take any suitable form.

[0390] Figure 20 shows the enclosure 314 when configured to have the nominal height Hnom. Figure 21 shows the enclosure 314 when configured to have the reduced height

[0391] 55739168-1 Hmin. Figure 22 shows the enclosure 314 when configured to have the increased height Hmax-

[0392] As shown, the enclosure 314 is configured to receive one or more platforms, generally denoted 348, configured and / or operable to receive cargo.

[0393] The height of the platforms 348 is adjustable. For example, in the illustrated enclosure 314 the platforms 348 comprise telescopic legs 350.

[0394] However, it will be understood that other means for adjusting the height of the platforms 348 may be provided, e.g. the platforms 348 may be mounted on rails which permit the platforms to be moved up and / or down.

[0395] It will be recognised that the height adjustment arrangements 342 may be used in combination.

[0396] As described above, various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0397] For example, Figure 23 & 24 of the accompanying drawings shows a diagrammatic view of a vehicle, generally denoted 410, comprising an alternative enclosure, generally denoted 414, In which one or more of a rear portion 432, front portion 452 and / or middle portion 454 of the enclosure 414 may be reconfigurable.

[0398] In the illustrated enclosure 414, the height of the rear portion 432, front portion 452 and / or middle portion 454 may be reconfigurable independently. Alternatively, the height of two or more of the rear portion 432, front portion 452 and / or middle portion 454 may be reconfigurable together.

[0399] As shown, the roof 426 of the enclosure 414 is coupled to a height actuation arrangement, generally denoted 444.

[0400] The height actuation arrangement 444 is configured and / or operable to move the roof 426 so as to reconfigure the height of the enclosure 314.

[0401] The height actuation arrangement 444 comprises a plurality of actuators 446. In the illustrated enclosure 414, the height actuation arrangement 444 comprises or takes the form of a hydraulic actuation arrangement and the actuators 446 are hydraulic actuators.

[0402] However, it will be understood that the height actuation arrangement 444 may take any suitable form.

[0403] As described above, various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0404] For example, Figures 25 and 26 of the accompanying drawings show an alternative drag-reducing enclosure, generally denoted 514. It shall be understood that

[0405] 55739168-1 the drag-reducing enclosure 514 is similar to the drag-reducing enclosure 14, and that like components are referenced using like reference numerals, incremented by 500.

[0406] As shown, the rear door arrangement 518 comprises a single door 520, wherein the door 520 comprises or takes the form of a shutter door. The rear door arrangement 518 is reconfigurable between a first, closed, configuration and a second, open, configuration,

[0407] Whereas Figure 25 shows the enclosure 514 configured in the first configuration and the rear door arrangement 518 configured in the first, closed, configuration, Figure 26 shows the enclosure 514 in the second, reduced drag, configuration and the rear door arrangement (not shown) in the second, open, configuration.

[0408] Referring now to Figure 27 of the accompanying drawings, the roof 526 of the enclosure 514 has been removed from view so as to show the door 520 positioned parallel relative to the roof 526 of the enclosure 514 having been received within a receiving portion (not shown for clarity purposes) in the second, open, configuration.

[0409] Referring now to Figures 28 and 29 of the accompanying drawings, there is shown a hangar rail, generally denoted 566.

[0410] Referring now in particular to Figure 28 of the accompanying drawings, the door 520 of the enclosure 514 has also been removed from view so as to show a hangar rail 566. The hangar rail 566 is positioned between the side walls 516 and the door 520 - having been receiving within the receiving portion (not shown) in the second, open, configuration. The hangar rail 566 is configured and / or operable to support the side walls 516 as the side walls 516 are pulled inwards during reconfiguration of the enclosure 514 from the first configuration to the second, reduced drag, configuration. The hangar rail

[0411] 566 is also configured and / or operable to support the side walls 516 as the side walls 516 are pushed outwards during reconfiguration of the enclosure 514 from the second, reduced drag, configuration to the first configuration (see also Figure 31 of the accompanying drawings).

[0412] Referring now in particular to Figure 29 of the accompanying drawings, the hangar rail 566 is shown to comprise a plurality of roller wheels 567, wherein each of the plurality of roller wheels 567 is coupled to and / or operatively associated with the top portion 562 of a corresponding one of the side walls 516. The plurality of roller wheels

[0413] 567 are received through the hangar rail 566 so as to enter into contact with a top surface 569 thereof. Each of the plurality of roller wheels 567 is configured and / or operable to roll along a curved track 571 of the hangar rail 566 so as to guide the direction in which the side walls 516 are either pulled inwards or pushed outwards for the purposes of

[0414] 55739168-1 reconfiguration of the enclosure 514 from the first configuration to the second, reduced drag, configuration.

[0415] Beneficially, the hangar rail 566 provides a low friction means by which the side walls 516 may be pulled inwards as well as pushed outwards by way of facilitating the suspension of the side walls 516 above the floor 530 of the enclosure 514.

[0416] Referring once again to Figure 28 of the accompanying drawings, there is also shown a support structure 568 configured and / or operable to provide lateral stiffness to the rear of the enclosure 514. As shown, the support structure 568 comprises or takes the form of a cross-braced roof structure.

[0417] Referring now to Figures 30 to 32 of the accompanying drawings, there is shown an adjustment arrangement, generally denoted 570. The adjustment arrangement comprises an actuation arrangement 572. The actuation arrangement 572 comprises or takes the form of a screw drive actuation arrangement. The actuation arrangement 572 is configured and / or operable to reconfigure the enclosure 514 from the first configuration to the second, reduced drag, configuration by way of pulling the side walls 516 inwards. The actuation arrangement 572 is also configured and / or operable to reconfigure the enclosure 514 from the second, reduced drag, configuration to the first configuration by way of pushing the side walls 516 outwards.

[0418] Referring now in particular to Figure 32 of the accompanying drawings, the actuation arrangement 572 is shown to comprise a plurality of carriages 574. The actuation arrangement also comprises a plurality of lead screws 576. Each of the plurality of carriages 574 is coupled to and / or operatively associated with a corresponding one of the plurality of lead screws 576. Each of the plurality of carriages 574 is also coupled to and / or operatively associated with the top portion 562 of a corresponding one of the side walls 516. Upon rotation of the lead screws 576 by means of an electric motor, the corresponding carriages 574 are translated laterally such that the corresponding side walls 516 are either pulled inwards or pushed outwards for the purposes of reconfiguration of the enclosure 514 from the first configuration to the second, reduced drag, configuration.

[0419] Referring now to Figures 33 and 34 of the accompanying drawings, there is shown a side wall lock arrangement, generally denoted 578. The side wall lock arrangement 578 comprises a plurality of mechanical linkages, generally denoted 580, coupled to and / or operatively associated with a plurality of pins, generally denoted 582. As shown, a number of the plurality of pins 582 are coupled to and / or operatively associated with the side wall 516 towards the top portion 562 of the side wall 516 and a

[0420] 55739168-1 number of the plurality of pins 582 are coupled to and / or operatively associated with the side wall 516 towards a bottom portion 584 of the side wall 516. The side wall lock arrangement 578 is actuated by means of a handle 586 located towards the rear of the side wall 516 and accessible to an operator by way of the rear door arrangement 518. By way of actuation of the handle 586, the pins 582 are extendable or retractable in order to either lock the side wall 516 in position or to unlock the side wall 516 so as to move the side wall 516 out of position. Each of the side walls 516 is coupled to and / or operatively associated with a respective side wall lock arrangement 578.

[0421] Referring now to Figures 35 and 36 of the accompanying drawings, there is shown a cover arrangement, generally denoted 593. The cover arrangement 593 is positioned between the base or floor 530 and the roof 526 of the enclosure 514.

[0422] Whereas Figure 35 shows a single cover arrangement 593 only, Figure 36 shows two cover arrangements 593.

[0423] The cover arrangement 593 comprises two panels 594, 595. As shown, a first side 596 of the first panel 594 is hingedly coupled to the base or floor 530, and a second side 597 of the first panel 594 is hingedly coupled to a first side 598 of the second panel 595. As is also shown, a second side 599 of the second panel 595 is hingedly coupled to the bottom portion 584 of the corresponding side wall 516.

[0424] The cover arrangement 593 is reconfigurable between a first, folded, configuration and a second, unfolded, configuration.

[0425] As best shown in Figure 35, the cover arrangement 593 is configured and / or operable to cover a portion of the base or floor 530 in the second, unfolded, configuration.

[0426] The cover arrangement 593 is reconfigured from the first, folded, configuration to the second, unfolded, configuration by way of pulling the corresponding side wall 516 inwards.

[0427] As best shown in Figure 36, the cover arrangement 593 is reconfigured from the second, unfolded, configuration to the first, folded, configuration by way of pushing the corresponding side wall 516 outwards.

[0428] In use, as the enclosure 514 is reconfigured from the first configuration to the second, reduced drag, configuration (by way of pulling the side walls 516 inwards), the corresponding cover arrangements 593 are reconfigured from the first, folded, configuration to the second, unfolded, configuration in which the cover arrangements 593 cover those portions of the base or floor 530 which would otherwise have been exposed to the surrounding environment following said reconfiguration of the enclosure 514. Subsequently, as the enclosure 514 is reconfigured from the second, reduced drag,

[0429] 55739168-1 configuration to the first configuration (by way of pushing the side walls 516 outwards), the corresponding cover arrangements 593 are reconfigured from the second, unfolded, configuration to the first, folded, configuration.

[0430] Beneficially, reconfiguration of the cover arrangements 593 from the first, folded, configuration to the second, unfolded, configuration so as to cover respective portions of the base or floor 530 of the enclosure 514 in the second, reduced drag, configuration protects said portions of the base or floor 530 from harmful (e.g. wet) weather conditions to which said portions would otherwise be exposed. In doing so, the base or floor 530 remains unaffected by said weather conditions (e.g. remains dry), ensuring that the base or floor 530 is in a condition to receive cargo thereon following reconfiguration of the enclosure 514 from the second, reduced drag, configuration to the first configuration.

[0431] As described above, various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0432] For example, Figures 37 and 38 of the accompanying drawings show an alternative drag-reducing enclosure, generally denoted 614. It shall be understood that the drag-reducing enclosure 614 is similar to the drag-reducing enclosure 514, and that like components are referenced using like reference numerals, incremented by 100.

[0433] As shown, the rear door arrangement 618 comprises a plurality of doors 620, wherein the rear door arrangement 618 comprises or takes the form of a barn door arrangement. The rear door arrangement 618 is reconfigurable between a first, closed, configuration and a second, open, configuration,

[0434] Whereas Figure 37 shows the enclosure 614 configured in the first configuration and the rear door arrangement 618 configured in the first, closed, configuration, Figure 38 shows the enclosure 614 in the second, reduced drag, configuration and the rear door arrangement 618 in the second, open, configuration.

[0435] Referring now to Figures 39 and 40 of the accompanying drawings, there is shown a rear door lock arrangement, generally denoted 688. The rear door lock arrangement 688 comprises a lever 690 and a rod 692, wherein the lever 690 is coupled to and / or operatively associated with the rod 692. The illustrated lever 690 is rigidly coupled, e.g. bonded, to the rod 692. The rod 692 is received within the door 620 of the rear door arrangement 618 and runs therethrough in the longitudinal direction.

[0436] Referring now in particular to Figure 39 of the accompanying drawings, the rear door arrangement 618 is shown in the first, closed, configuration, in which the lever 690 has been actuated so as to lock the door 620 in position.

[0437] 55739168-1 Referring now in particular to Figure 40 of the accompanying drawings, by way of actuation of the lever 690, the door 620 has been unlocked so as to be moved out of position, thus facilitating reconfiguration of the rear door arrangement 618 from the first, closed, configuration to the second, open, configuration. So as to facilitate said reconfiguration, the door 620 is permitted to rotate outwards through 270 degrees or substantially 270 degrees, at which point the door 620 may once again be locked in position by way of actuation of the lever 690.

[0438] As described above, various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0439] Referring now in particular to Figures 41 to 43, there is shown an alternative cargo-carrying enclosure, generally denoted 714.

[0440] Each of the rigid side walls 716 of the enclosure 714 comprises a plurality of rigid side wall sections 781 .

[0441] Each of the side wall sections 781 are rotatably coupled to the other by means of a hinged pivot 783.

[0442] The enclosure 714 comprises a plurality of hinged pivot lock arrangements, generally denoted 785, each of the hinged pivot lock arrangements 785 being coupled to and / or operatively associated with a hinged pivot 783 of a respective one of the side wall sections 781.

[0443] Each of the hinged pivot lock arrangements 785 is reconfigurable from a first, locked, configuration to a second, unlocked, configuration.

[0444] In use, having reconfigured the rear door arrangement 718 from the first, closed, configuration to the second, open, configuration, the hinged pivot lock arrangement 785 coupled to and / or operatively associated with the hinged pivot 783 of a selected one of the side wall sections 781 is reconfigured from the first, locked, configuration to the second, unlocked, configuration. The side wall 716 of the enclosure 714 comprising said side wall section 781 is thus rotatable about said hinged pivot 783 in the second, unlocked, configuration for the purposes of tapering said side wall 716 inwards at a discrete point along the associated enclosure 714 in the longitudinal direction corresponding to the position of said hinged pivot 783. Having sufficiently tapered said side wall 716 inwards as described, said hinged pivot 783 is then reconfigured from the second, unlocked, configuration to the first, locked, configuration. In this manner, the overall enclosure 714 is reconfigurable from the first configuration to the second, reduced drag, configuration. Prior to the tapering of the associated side wall 716 inwards as described, each of the side wall sections 781 is aligned colinearly with the others in the

[0445] 55739168-1 first configuration of the enclosure 714, each of the hinged pivot lock arrangements 785 coupled to and / or operatively associated with the hinged pivots 783 of each of the side wall sections 781 , respectively, being configured in the first, locked, configuration whilst the enclosure 714 is configured in the first configuration.

[0446] Beneficially, in order to reconfigure the enclosure 714 from the first configuration to the second, reduced drag, configuration, the ability to pivot a particular side wall section 781 about an associated hinged pivot 783 at a discrete point along the length of the enclosure 714 enables the enclosure 714 to be so reconfigured relative to the amount of cargo load which remains to be delivered. As the cargo load is progressively lessened, a hinged pivot 783 of a side wall section 781 located further along the length of the enclosure 714 can be selected for unlocking, thus facilitating the tapering of the associated side wall 716 at a point further along the length of the enclosure 714 relative to the amount of cargo load remaining, thus minimising the volume of “dead space” contained within the enclosure 714 as the cargo load is lessened, improving fuel economy, and in turn efficacy of road transport and environmental benefit. In order words, the plurality of side wall sections 781 as described permits the tapering geometry to be adjusted relative to the cargo load distribution, permitting optimisation of the configuration of the enclosure 714 for differing loading conditions.

[0447] Moreover, by way of tapering the side wall 716 of the enclosure 714 inwards, the plurality of side wall sections 781 beneficially reduces the level of jack-knifing required to be reached during the completion of a reverse manoeuvre in order to permit the driver of a goods vehicle to view the rear of the enclosure 714. In other words, the further along the longitudinal axis relative to the rear of the enclosure 714 that the tapering begins, the less the enclosure 714 jack-knifes relative to the goods vehicle itself before the driver gains a clear view of the typical rear blind spot. As such, the plurality of side wall sections 781 as described improve the safety and manoeuvrability with which a goods vehicle can be operated.

[0448] Figure 42 shows the cargo-carrying enclosure 714 of Figure 41 in a second, reduced drag, configuration.

[0449] Figure 43 shows the cargo-carrying enclosure 714 of Fig. 41 in a further second, reduced drag, configuration.

[0450] Referring now in particular to Figure 44, there is shown an alternative cargocarrying enclosure, generally denoted 814, in a first configuration.

[0451] The curtain-sider or non-rigid enclosure 814 comprises two back posts 887.

[0452] 55739168-1 A first of the back posts 887 is coupled to and / or operatively associated with a first side of the curtain-sider or a first non-rigid side wall 816, and a second of the back posts 887 is coupled to and / or operatively associated with a second side of the curtain- sider or a second non-rigid side wall 816.

[0453] In the first configuration of the enclosure 814, each of the back posts 887 is coplanar with the rear door arrangement 818.

[0454] Each of the back posts 887 is translatable in the width direction so as to reconfigure the enclosure 814 from the first configuration to the second, reduced drag, configuration.

[0455] The rear door arrangement 818 is configured and / or operable to move, e.g. slide, axially, i.e. along the longitudinal axis of the enclosure 814.

[0456] In use, where the enclosure 814 is a curtain-sider or non-rigid enclosure, sliding of the rear door arrangement 818 axially along the longitudinal axis of the enclosure 814 permits each side of the curtain-sider or each non-rigid side wall 816 to be tapered by way of translation of the associated back posts 887 in the width direction of the enclosure 814. As the back post 887 of an associated side of the curtain-sider or an associated non-rigid side wall 816 is translated along the width direction following sliding of the rear door arrangement 818 as described, said side of the curtain-sider or said non-rigid side wall 816 bends around the rear door arrangement 818 at whichever point along the length of the enclosure 814 the rear door arrangement 818 has come to rest, said side 816 thus tapering towards the translated back post 887. In having slid the rear door arrangement 818 and translated the back posts 887 as described, the enclosure 814 has been reconfigured from the first configuration to the second, reduced drag, configuration.

[0457] Beneficially, this ability to control the taper of the sides of the curtain-sider or the non-rigid side walls 816 by way of translation of the associated back posts 887 facilitates control of the angle at which the sides of the curtain-sider or the non-rigid side walls 816 is tapered. By way of translating the back posts 887 only partially along the width direction, the angle of the taper of the side walls 816 can be maintained as shallow, thus reducing and / or mitigating the risk of any airflow stall.

[0458] Moreover, the ability to taper the sides of the curtain-sider or the non-rigid side walls 816 as described permits the tapering of said sides 816 at any point, i.e. continuously, along the longitudinal direction of the enclosure 814, rather than it being required that such tapering be performed at discrete points only. As such, the taper points need not be positioned along the longitudinal direction relative to standard pallet sizes and / or distributions, thus maximising the reduction of “dead space” possible byway

[0459] 55739168-1 of reconfiguration of the enclosure 814 regardless of the size of cargo load / distribution thereof which remains onboard. In order words, the curtain-sider or non-rigid enclosure 814 as described permits the tapering geometry to be adjusted relative to the cargo load distribution, permitting optimisation of the configuration of the enclosure 814 for differing loading conditions.

[0460] In addition, by way of tapering one or each of the sides of the curtain-sider or the non-rigid side walls 816 inwards as described, the curtain-sider or non-rigid enclosure 814 as described beneficially reduces the level of jack-knifing required to be reached during the completion of a reverse manoeuvre in order to permit the driver of a goods vehicle to view the rear of the enclosure 814. In other words, the further along the longitudinal axis relative to the rear of the enclosure 814 that the tapering begins, the less the enclosure 814 jack-knifes relative to the goods vehicle itself before the driver gains a clear view of the typical rear blind spot. As such, the curtain-sider or the non- rigid enclosure 814 as described improves the safety and manoeuvrability with which a goods vehicle can be operated.

[0461] The tapering of the side walls 816 of the curtain-sider or the non-rigid enclosure 814 as described improves the ability of the enclosure 814 to deflect airflow during strong crosswinds, thus reducing and / or mitigating any associated risk of the enclosure 814 / the goods vehicle overturning. In instances where the enclosure 814 has become lighter or only partially loaded, the reduction and / or mitigation of the risk of overturning is particularly beneficial.

[0462] Figure 45 shows the cargo-carrying enclosure 814 of Figure 44 in a second, reduced drag, configuration. Figure 46 shows the cargo-carrying enclosure 814 of Fig. 44 in a further second, reduced drag, configuration. Figure 47 shows the cargo-carrying enclosure 814 of Fig. 44 in a further second, reduced drag, configuration. Figure 48 shows the cargo-carrying enclosure 814 of Fig. 47 in attachment to a goods vehicle, generally denoted 810, in the process of reversing. Figure 49 shows the side wall 916 of an alternative cargo-carrying enclosure, generally denoted 914.

[0463] Each of the side walls 916 of the enclosure 914 comprises a plurality of ribs 989.

[0464] Each of the ribs 989 extend from an exterior surface of the associated side wall 916.

[0465] Each of the plurality of ribs 989 are separated by a gap 991 positioned therebetween along the longitudinal axis of the enclosure 914.

[0466] Each of the ribs 989 extend perpendicular to the exterior surface of the associated side wall 916.

[0467] 55739168-1 In use, as air flows along the exterior surface of the side wall 916 of the enclosure 914, vortices form in the gaps 991 provided between each of the ribs 989 extending from said exterior surface. By way of the formation of said vortices, a low-pressure zone is formed within each of said gaps 991 , with said vortices mixing with and reenergising said flow of air all along the length of the enclosure 914.

[0468] Beneficially, by way of reenergising the flow of air as described, the plurality of ribs 989 reduce and / or mitigate the effects of any drag-inducing boundary layer which might otherwise form along the exterior surface of the side wall 916 of the enclosure 914. For example, as the vortices mix air whilst it flows along the exterior surface of the enclosure 914, the drag-inducing boundary layer is prevented from forming consistently. Having reduced and / or mitigated the effects of said drag-inducing boundary layer, any angle at which the associated side wall 916 is tapered can be increased, leading to a reduction of the drag to which the enclosure 914 is subjected.

[0469] Moreover, the plurality of ribs 989 reduce and / or mitigate the surface-to-air contact time associated with airflow along the exterior surface of the side wall 916, thus reducing and / or mitigating the effects of any associated skin friction.

[0470] Referring now in particular to Figure 50, there is shown the side wall 1016 of an alternative cargo-carrying enclosure, generally denoted 1014.

[0471] Each of the ribs 1089 comprises a distal end. The distal end is coupled to and / or operatively associated with a blowing arrangement, generally denoted 1002.

[0472] Each of the ribs 1089 comprises a proximal end. The proximal end is coupled to and / or operatively associated with a suction arrangement, generally denoted 1004.

[0473] In use, the operation of blowing and suction arrangements 1002. 1004 coupled to and / or operatively associated with the distal and proximal ends, respectively, of each of the ribs 1089 enhances the power of the vortices produced in the gaps 1091 separating each of said ribs 1089.

[0474] Beneficially, the blowing and suction arrangements 1002, 1004 as described further reduce and / or mitigate the effects of any drag-inducing boundary layer which might otherwise form along the exterior surface of the side wall 1016 of the enclosure 1014. For example, as the mixing of the air by the vortices whilst it flows along the exterior surface of the enclosure 1014 is enhanced, the drag-inducing boundary layer is further prevented from forming consistently. Having further reduced and / or mitigated the effects of said drag-inducing boundary layer, any angle at which the associated side wall 1016 is tapered can be further increased, leading to a further reduction of the drag to which the enclosure 1014 is subjected.

[0475] 55739168-1 Figure 51 shows air velocity over the side wall 2016 of an alternative cargocarrying enclosure, generally denoted 2014, each of the plurality of ribs 2089 of which form a stepped configuration. Figure 52 shows air velocity over the side wall 3016 of an alternative cargo-carrying enclosure, generally denoted 3014, each of the plurality of ribs 3089 of which form a stepped configuration.

[0476] Each of the ribs 3089 comprises a distal end. The distal end is coupled to and / or operatively associated with a blowing arrangement, generally denoted 3002.

[0477] Each of the ribs 3089 comprises a proximal end. The proximal end is coupled to and / or operatively associated with a suction arrangement, generally denoted 3004.

[0478] Referring now in particular to Figure 53, there is shown the interior of an alternative cargo-carrying enclosure, generally denoted 4014. Figure 54 shows a cross- sectional view of a portion of a side wall 4016 of the cargo-carrying enclosure 4014 of Fig. 53.

[0479] A strip of each of the side walls 4016 comprise or take the form of a composite arrangement, generally denoted 4002.

[0480] The composite arrangement 4002 comprises two composite structures 4004.

[0481] Each of the composite structures 4004 comprises or takes the form of a two-ply composite structure.

[0482] Each of the composite structures 4004 comprises a plurality of reinforced portions 4006, each of which comprises or takes the form of a three-ply structure.

[0483] Each of the reinforced portions 4006 extends from an exterior surface of the composite structure 4004.

[0484] The composite arrangement 4002 also comprises a core 4008 disposed between the first and second composite structures 4004.

[0485] The core 4008 comprises or takes the form of a foam structure and comprises a plurality of reinforced portions 4010, each of which comprises or takes the form of a high- density foam structure.

[0486] Each of the reinforced portions 4006 of the first composite structure 4004 is aligned or substantially aligned with a corresponding one of the reinforced portions of the second composite structure 4004 and a corresponding one of the reinforced portions of the core 4008.

[0487] The composite arrangement 4002 comprises or takes the form of a high-load bearing area of the side wall 4016, and each of the reinforced portions 4006, 4010 of the first composite structure 4004, the second composite structure 4004 and the core 4008 is aligned or substantially aligned with a high-load bearing area of the side wall 4016.

[0488] 55739168-1 In use, a strip of the side wall 4016 comprises or takes the form of the composite arrangement 4002, the foam core 4008 is disposed between a first, two-ply composite structure 4004 and a second, two-ply composite structure 4004 so as to form the stripped composite arrangement 4002 of the side wall 4016. Each of the foam core 4008, the first composite structure 4004 and the second composite structure 4004 has two reinforced portions 4006, 4010. The first reinforced portion 4010 of the core 4008 is aligned with the first reinforced portion 4006 of the first and second composite structures 4004, and the second reinforced portion 4010 of the core 4008 is aligned with the second reinforced portion 4006 of the first and second composite structures 4004. This stripped composite arrangement 4002 is positioned, and thus alignment of the reinforced portions 4006, 4010 occurs, at those positions throughout the side wall 4016 which bear the highest load, e.g. those positions at which cargo rails 4012 (as best shown in Fig. 53) are coupled to and / or operatively associated with said side wall 4016.

[0489] Beneficially, the inclusion of targeted reinforcement zones at key structural areas throughout the side walls 4016 as described permits the overall composite ply thickness (out with said reinforcement zones) of these side walls 4016 to be reduced, thus reducing the overall weight of said side walls 4016 and any costs associated with the construction thereof. As such, any structural arrangements which are required to support these side walls 4016 and any actuation arrangements which are required to move these side walls 4016 may be reduced in complexity, increasing the overall efficiency with which the enclosure 4014 is operated and reducing any associated inertia. Moreover, reducing the weight of the side walls 4016 as described improves the overall fuel efficiency of any associated goods vehicle and / or enables an increased payload capacity. In addition, the overall strength-to-weight ratio of the side walls 4016 is increased.

[0490] It is also noted that, where these composite arrangements 4002 comprise or take the form of stripped portions of the respective side walls 4016, any loads exerted on the key structural areas in which said stripped composite arrangements 4002 are positioned may be directed longitudinally along the enclosure 4014.

[0491] As described above, various modifications may be made without departing from the scope of the invention as defined by the appended claims.

[0492] Referring now to Figures 55 and 56 of the accompanying drawings, there is shown a diagrammatic view of the blowing and suction arrangements 5002, 5004 of an alternative cargo-carrying enclosure, generally denoted 5014, and a diagrammatic view of one of the ribs 5089 of the cargo-carrying enclosure 5014.

[0493] 55739168-1 As shown in Figure 55, the air compressor system 5006 of the goods vehicle 5010 to which the enclosure 5014 is attached, which is driven directly by the engine 5008 of said goods vehicle 5010 and sends air typically to the braking system 5012 of the enclosure 5014, is utilised by the blowing arrangement 5002 and the suction arrangement 5004 in order to blow air out of a first channel and draw air into a second channel, respectively, formed in each of the respective ribs 5089.

[0494] Beneficially, the blowing arrangement 5002 and the suction arrangement 5004 facilitate the reattachment of the airflow at any point along the exterior surface of the respective sidewalls 5016, improving the aerodynamic efficiency of the overall enclosure 5014.

[0495] Referring now in particular to Figure 56 of the accompanying drawings, there is shown a diagrammatic view of one of the ribs 5089 of the cargo-carrying enclosure 5014 of Figure 55.

[0496] The air compressor system 5006 of the goods vehicle 5010 to which the enclosure 5014 is attached, which is driven directly by the engine 5008 of said goods vehicle 5010 and sends air typically to the braking system 5012 of the enclosure 5014, is utilised by the blowing arrangement 5002 and the suction arrangement 5004 in order to blow air out of a first channel 5018 and draw air into a second channel 5020, respectively, each formed in the rib 5089. The first channel 5018 is formed in the rib 5089 at a distal end thereof, and the second channel 5020 is formed in the rib 5089 at a proximal end thereof.

[0497] 55739168-1

Claims

CLAIMS1. A drag-reducing enclosure for a goods vehicle, wherein the enclosure is reconfigurable between a first configuration and a second, reduced drag, configuration, wherein in the second configuration the side walls of the enclosure are tapered inwards so as to reduce aerodynamic drag during transport.

2. The enclosure of claim 1 , wherein the enclosure comprises or takes the form of a trailer.

3. The enclosure of claim 1 or 2, wherein the enclosure comprises a rear door arrangement, wherein the rear door arrangement is configured and / or operable to facilitate reconfiguration of the enclosure between the first configuration and the second configuration.

4. The enclosure of claim 3, wherein the rear door arrangement is reconfigurable from a first configuration in which the rear door arrangement has a first width and a second configuration in which the rear door arrangement has a second, smaller, width.

5. The enclosure of claim 4, wherein the enclosure is reconfigurable from its first configuration to its second, drag-reducing, configuration by reconfiguring the rear door arrangement from its first configuration to its second, reduced width, configuration.

6. The enclosure of claim 3, 4 or 5, wherein the rear door arrangement comprises a plurality of doors.

7. The enclosure of claim 6, wherein the plurality of doors are pivotably coupled together, e.g. via one or more hinges.

8. The enclosure of claim 7, wherein the doors are configured and / or operable to fold in on themselves relative to a centreline of the enclosure, thereby pulling the side walls inwards and reconfiguring the enclosure to the second, drag-reducing, configuration.55739168-19. The enclosure of claim 6, wherein the plurality of doors are slidable relative to each other, e.g. via one or more slider, track or the like.

10. The enclosure of claim 9, wherein the doors are configured and / or operable to slide relative to each other so as to define the second, reduced width, configuration, thereby pulling the side walls inwards and reconfiguring the enclosure to the second, drag-reducing, configuration.

11. The enclosure of any preceding claim, wherein the rear door arrangement is configured and / or operable to move, e.g. slide, axially, along the longitudinal axis of the enclosure.

12. The enclosure of claim 11, comprising a rear door adjustment arrangement for moving, e.g. sliding, the rear door arrangement.

13. The enclosure of claim 12, wherein the rear door adjustment arrangement comprises or takes the form a belt drive, rail and / or a gearing mechanism.

14. The enclosure of any preceding claim, wherein the enclosure is configured and / or operable so that the side walls can be tapered inwards from discrete points along the length of the enclosure.

15. The enclosure of claim 14, wherein each of the side walls comprises a plurality of side wall sections.

16. The enclosure of claim 15, wherein each of the side wall sections is rotatably coupled to the other by means of a hinged pivot.

17. The enclosure of claim 16, comprising a plurality of hinged pivot lock arrangements, each of the hinged pivot lock arrangements being coupled to and / or operatively associated with a hinged pivot of a respective one of the side wall sections.

18. The enclosure of claim 17, wherein each of the hinged pivot lock arrangements may be reconfigurable from a first, locked, configuration to a second, unlocked, configuration.55739168-119. The enclosure of any one of claims 1 to 13, wherein the enclosure is configured and / or operable so that the side walls can be tapered inwards at any point along the length of the enclosure.

20. The enclosure of claim 19, wherein the enclosure is non-rigid.

21. The enclosure of claim 20, wherein the non-rigid enclosure comprises two back posts.

22. The enclosure of claim 21 , wherein a first of the back posts is coupled to and / or operatively associated with a first non-rigid side wall and a second of the back posts is coupled to and / or operatively associated with a second non-rigid side wall, each of the back posts being translatable in a width direction of the enclosure.

23. The enclosure of claim 22, wherein each of the back posts is translatable in the width direction so as to reconfigure the enclosure from the first configuration to the second, reduced drag, configuration.

24. The enclosure of any preceding claim, wherein the enclosure comprises a roof.

25. The enclosure of claim 24, wherein the roof of the enclosure comprises or takes the form of a corrugated structure.

26. The enclosure of claim 24 or 25, wherein the roof comprises or takes the form of a rigid structure.

27. The enclosure of claim 24 or 25, wherein the roof is constructed from a flexible material, e.g. a re-enforced fibre composite, a rubber or a flexible plastic material.

28. The enclosure of claim 24, 25 or 27, wherein the roof of the enclosure comprises a fabric layer.29 The enclosure of claim 28, wherein the fabric layer extends down the side walls of the enclosure and / or is secured to a base or floor of the enclosure.55739168-130. The enclosure of claim 28 or 29, wherein the fabric layer is maintained in tension in use.

31. The enclosure of any preceding claim, wherein at least one of: a height of at least part of the enclosure is reconfigurable from a nominal height to an increased height, so as to define an increased e.g. maximum, capacity configuration; a height of at least part of the enclosure is reconfigurable from a nominal height to a reduced height, so as to define a reduced drag configuration.

32. The enclosure of claim 31 , wherein at least one of: the reconfiguration in height is achieved via the reconfiguration of the door arrangement; the enclosure comprises a height adjustment arrangement configured and / or operable to move, the roof of the enclosure. the enclosure comprises or is configured to receive one or more platforms configured and / or operable to receive cargo, wherein the height of the one or more of the platforms is adjustable.

33. The enclosure of any preceding claim, wherein the enclosure comprises a hangar rail.

34. The enclosure of any preceding claim, wherein the enclosure comprises at least one side wall lock arrangement.35 The enclosure of any preceding claim, wherein the enclosure comprises at least one rear door lock arrangement.

36. The enclosure of any preceding claim, wherein at least one of the side walls of the enclosure comprises one or more ribs extending from an exterior surface of the at least one side wall.

37. The enclosure of claim 36, wherein at least one of:55739168-1at least one of the one or more ribs is coupled to and / or operatively associated with a blowing arrangement; at least one of the one or more ribs is coupled to and / or operatively associated with a suction arrangement.

38. The enclosure of any preceding claim, wherein at least one of the side walls of the enclosure comprises or takes the form of a composite arrangement.

39. A goods vehicle comprising the drag-reducing enclosure of any one of claims 1 to 38.

40. A method of transporting goods and / or cargo using the drag-reducing enclosure of any one of claims 1 to 38 or the vehicle of claim 39.55739168-1

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