Telescopic rotating rigging

Abstract

The invention relates to a Flettner-type rotating rig comprising: a fixed mast (100); a lower tubular section (110) of a first outside diameter (190); an upper tubular section (120) of a second inside diameter (191), the second inside diameter (191) being larger than the first outside diameter (190); a drive device (130) for rotating the lower tubular section (110) around the fixed mast (100); a linear displacement device (160, 161, 162) for the upper tubular section (120) relative to the lower tubular section (110) between a retracted position and a deployed position; and an axial locking device (152) and a rotational locking device (151) for the upper tubular section (120) relative to the lower tubular section (110) in the deployed position.

Description

Title of the invention: Telescopic rotating rigging technical field

[0001] The invention relates to the field of sail propulsion devices. More particularly, the invention relates to a Flettner-type telescopic rotating cylindrical rig capable of being deployed and retracted. Previous technique

[0002] A Flettner type rotating rig constitutes a sail propulsion device for a ship, and comprises a rotating cylindrical rigid sail, the diameter of which is several meters, extending vertically from a deck of the ship to a height equal to several times the diameter.

[0003] This sail is set in rotation, typically at a speed of a few hundred rpm, so that when it is subjected to the wind, this sail produces, by an aerodynamic effect known as the Magnus effect, a thrust perpendicular to the direction of the wind and to its axis of rotation.

[0004] The aspect ratio of such a sail, the ratio of its height to its diameter, is typically between 4 and 9, i.e. for a sail with a diameter of 5 meters, a height between 20 m and 45 m.

[0005] The presence of one or more sails of this type on a ship is not without posing some difficulties, particularly when the ship is not offshore or when the sail propulsion device is not in use.

[0006] Indeed, the sail produces an air draft, a capsizing moment, reduces visibility, hinders the passage of engineering structures as well as the transshipment of equipment, particularly by means of a crane.

[0007] Several techniques have also been used to allow a Flettner sail to be lowered.

[0008] US patent 4,401,284 describes a vessel comprising a drop-down Flettner sail, consisting of a waterproof, inflatable textile tarpaulin, stiffened by an internal structure including mast rings mounted on a cable and connected to the waterproof tarpaulin by flexible straps. Inflating and deploying the tarpaulin puts tension on the cable and the straps.

[0009] Such a prior art device has the disadvantage of requiring the maintenance of internal pressure within the tarpaulin at a level sufficient to ensure its rigidity, which consumes additional energy and makes the device susceptible to malfunctions or adverse sea conditions. Therefore, such a device cannot constitute the primary propulsion method of a vessel.

[0010] US patent 4,602,584 describes a vessel equipped with a Flettner-type rotating sail, comprising at its base, substantially at deck level, a hinge mechanism allowing the rotating sail to be lowered by tilting it onto the deck. This type of mechanism is also difficult to adapt to large rotating sails weighing several tens of tons; it also requires additional stays to hold the rotating sail in position, which encumber the deck.

[0011] Co-pending application FR2311073 of October 13, 2023, describes a Flettner-type rotating sail comprising a hinge allowing an upper segment of the sail to be tilted approximately at mid-height. While this device is satisfactory, it nevertheless increases the lateral bulk of the rotating sail when it is lowered. This lowering system can also be difficult to maneuver in strong winds or in rough seas.

[0012] Document EP2536624 describes a telescopic Flettner sail comprising a telescopic mast supporting a drive motor at the top of the telescopic mast. Summary of the invention

[0013] The proposed device aims to resolve these drawbacks and, to this end, relates to a Flettner-type rotating rig comprising:

[0014] a fixed mast;

[0015] a lower tubular section of a first external diameter and extending along a longitudinal axis of rotation;

[0016] an upper tubular section of a second inner diameter extending along the longitudinal axis of rotation, the second inner diameter being greater than the first outer diameter;

[0017] a device for driving the lower tubular section in rotation around the longitudinal axis of rotation and a rotational guidance of the lower tubular section around the fixed mast;

[0018] a linear displacement device of the upper tubular section relative to the lower tubular section parallel to the longitudinal axis of rotation between a retracted position and an extended position; and

[0019] an axial locking and rotational locking device of the upper tubular section relative to the lower tubular section in the deployed position.

[0020] Thus, the height of the rigging can be varied by a telescopic movement of the upper tubular section relative to the lower tubular section between a deployed and a retracted position. More specifically, the rotating rigging can be configured in the retracted position to reduce its overall size.

[0021] The device is implemented according to the embodiments and variants set out below, which are to be considered individually or according to any technically operative combination.

[0022] According to one embodiment, the linear displacement device comprises at least one cable for hoisting the upper tubular section and at least one cable for lowering the upper tubular section, the at least one cable for hoisting and the at least one cable for lowering being wound around the same winch.

[0023] Advantageously, the drive device includes a direct drive torque motor linked to the fixed mast at an upper end of the fixed mast.

[0024] According to one embodiment, the rotating rigging comprises an upper telescopic part in sliding connection with the fixed mast and a rotational guide for the upper tubular section around the upper telescopic part.

[0025] According to this embodiment, the upper telescopic part comprises a non-rotating platform at one apex.

[0026] According to this embodiment, the non-rotating platform advantageously carries equipment selected from: an anemometer, a wind vane, a camera and a lightning rod.

[0027] According to one embodiment, the lower tubular section and the upper tubular section can be linked by a sliding joint configured to allow the upper tubular section to slide relative to the inner tubular section in a direction parallel to the longitudinal axis of rotation.

[0028] According to one embodiment, the sliding connection comprises a plurality of rails distributed angularly on an inner circumference of the upper tubular section and a plurality of pads, each pad being connected to an outer circumference of the lower tubular section opposite a rail.

[0029] According to one embodiment, each pad is linked to the outer circumference of the lower tubular section by a flexible connection comprising at least one elastic buffer.

[0030] Regardless of the embodiment, the locking device may include a transfer platform linked to the lower tubular section at an upper end of the lower tubular section and an inner ferrule linked to the upper tubular section, the rotational locking device being configured to rotationally link the transfer platform and the inner ferrule when the upper tubular section is in the deployed position.

[0031] According to one embodiment, the axial locking device is configured to axially link the transfer platform and the inner ferrule when the upper tubular section is in the deployed position.

[0032] According to one embodiment, the transfer platform includes a conical part at the periphery and the inner ferrule is a conical ferrule configured to come into contact with the conical part when the upper tubular section is in the deployed position.

[0033] The conical part and the conical ferrule may include grooves configured to achieve a dog clutch between the conical part and the conical ferrule when the upper tubular section is in the deployed position.

[0034] Advantageously, the fixed mast is hollow and includes an internal passage with a diameter greater than 700 mm over its entire height.

[0035] The rotating rigging, whatever its embodiment, can be installed on a ship which then includes a Flettner type telescopic rotating rigging capable of rotating around an axis of rotation perpendicular to a deck of the ship, comprising a lower tubular section and an upper tubular section configured to slide coaxially with the lower tubular section between a retracted position where the upper tubular section is close to the deck of the ship and a deployed position where the upper tubular section is away from the deck of the ship, in which an outside diameter of the upper tubular section is greater than an outside diameter of the lower section.

[0036] According to one embodiment, a deployed height of the rotating rigging, measured from the ship's deck when the upper tubular section is in the deployed position, is between 4 and 9 times the outside diameter of the upper tubular section.

[0037] Advantageously, a retracted height of the rotating rigging measured from the deck of the ship when the upper tubular section is in the retracted position is between 50% and 70% of the deployed height. Brief description of the drawings

[0038] The telescopic rotating rigging is implemented according to the preferred but in no way limiting embodiments shown below with reference to [Fig. 1] to [Fig. 8] in which Fig. 1

[0039] [Fig.l] shows, according to a longitudinal cross-sectional view, a schematic diagram of a first example of the realization of the telescopic rotating rigging; Fig. 2

[0040] [Fig.2] represents, in a longitudinal cross-sectional view, a schematic diagram of a second example of the implementation of the telescopic rigging; Fig.3

[0041] [Fig.3] represents a schematic detail view according to a cross-section of a sliding connection between the lower tubular section and the upper tubular section; Fig. 4

[0042] [Fig.4] shows, according to a schematic detail view in longitudinal section, a example of how to achieve the locking between the lower tubular section and the upper tubular section; Fig. 5

[0043] [Fig. 5] represents, according to a partial longitudinal cross-sectional view, an example of implementation of a rotational drive for the rotating rigging; Fig. 6A

[0044] [Fig.6A] represents, according to a profile view, an example of a ship equipped with rotating rigging in the deployed position; Fig. 6B

[0045] [Fig.6B] shows the vessel of [Fig.6A] with the rotating rigging in the retracted position. Fig. 7A

[0046] [Fig. 7A] shows, in a top view, the orientation of a sail propulsion force produced by a Flettner-type rotating rig subjected to a true starboard wind; Fig. 7B

[0047] [Fig.7B] shows in top view the orientation of a sail propulsion force produced by a Flettner type rotating rig subjected to an apparent wind due to the advancement of a ship under the effect of this force. Fig. 8

[0048] [Fig.8] shows, in a longitudinal cross-sectional view, a schematic diagram of a third example of the implementation of the telescopic rigging. Description of the implementation methods

[0049] [Fig. 1] According to one embodiment, the Flettner type rotating rig comprises a fixed mast (100) configured to be fixed in a lower part of a ship's deck (not shown) and extending perpendicularly to this deck in a substantially vertical direction which corresponds to a longitudinal axis of rotation (101) of the rotating rig.

[0050] The rotating rigging includes a lower tubular section (110) guided in rotation around the fixed mast (100) along the longitudinal axis of rotation (101) by bearings (111, 112) configured to transfer a radial load and an axial load from the lower tubular section (110) to the fixed mast (100).

[0051] According to one embodiment, a direct drive torque motor (130) enables the rotation of the lower tubular section around the longitudinal axis of rotation (101) relative to the fixed mast (100).

[0052] The rotating rigging comprises an upper tubular section (120). This is in a sliding connection relative to the lower tubular section (110) in a direction parallel to the longitudinal axis of rotation (101).

[0053] According to one embodiment, the sliding connection is achieved by a plurality of rails (121) linked to an inner wall of the upper tubular section, the rails being configured to slide in pads (115) linked to the lower tubular section.

[0054] An inner diameter (191) of the upper tubular section is greater than an outer diameter (190) of the lower tubular section so that the upper tubular section can slide on the lower tubular section, between a deployed position as shown [Fig.1] and a retracted position.

[0055] The transition from the retracted position to the deployed position and vice versa is achieved when the rotating rigging is not driven in rotation.

[0056] The lower tubular section includes a transfer platform (140) fixed to an upper end of the lower section.

[0057] The upper tubular section includes an inner ferrule (145) configured to cooperate with the transfer platform (140) when the upper tubular section is in the deployed position to achieve rotational locking (151) and axial locking (152) of the upper tubular section (120) to the lower tubular section (110)

[0058] The transfer platform (140) is also a technical platform and, according to one embodiment, also supports a device for raising and lowering the upper tubular section for its movement between the retracted position and the deployed position and vice versa.

[0059] To this end, according to one embodiment, a device for raising and lowering the upper tubular section comprises at least one lifting cable (161) and at least one lowering cable (162), each associated with pulleys and wound around the same winch (160). Preferably, the raising and lowering device comprises three lifting cables and three lowering cables distributed around the circumference of the upper tubular section (120), all six cables being wound around the same winch.

[0060] According to this embodiment, the transmission of the rotary power to the upper tubular section and the transmission of the sail thrust exerted on the upper tubular section are carried out by the transfer platform (140) and the inner ferrule (145) via the rotational lock (151) and the axial lock (151).

[0061] The use of a direct-drive torque motor (130) to drive the rotating rigging allows the latter to be mounted at the upper end of the fixed mast as close as possible to the transfer platform (140) while maintaining at the top of the fixed mast (100) a free passage with a diameter (192) of at least 700 mm for to allow access via the inside of the fixed mast (100) to the transfer platform (140) in particular to carry out adjustment or maintenance operations.

[0062] The rotating rigging is not designed to be rotated and produce sail thrust, apart from its air draft, when it is in the retracted position.

[0063] [Fig.2] According to another embodiment, the rotating rigging comprises a part upper telescopic arm (200) in sliding connection with the fixed mast (100), for example via a trolley (220) inside the fixed mast

[0064] According to this embodiment, the upper tubular section (120) is guided in rotation on this upper telescopic part (200) for example by a bearing housing (211).

[0065] A sliding connection between the upper tubular section and the lower tubular section is, for example, achieved by a plurality of rails (121) fixed to an inner wall of the upper tubular section, which cooperate with a plurality of slides (122) fixed to the lower tubular section. This connection ensures the angular positioning of the upper tubular section relative to the lower tubular section.

[0066] According to alternative embodiments, the hoisting and lowering device can be implemented by a plurality of synchronized winches, for example, two or three winches (260), each winch winding at least one hoisting cable (161) and at least one lowering cable (162). Alternatively, the hoisting and lowering device can be implemented by cables (not shown) acting inside the fixed mast (100) on the trolley (220), or by a rack and pinion system, a rack (270) parallel to the longitudinal axis of rotation (101) being fixed inside the fixed mast (100) and the trolley having a motorized pinion (not shown) capable of meshing with the rack (270).These different variants can be combined, for example, a rack and pinion system and a cable-operated hoisting and lowering device at the pier of the transfer platform (140) so as to distribute the hoisting and lowering forces and to secure the device, particularly in the event of a power failure.

[0067] Advantageously, the upper telescopic part (200) includes at its top a platform (201), non-rotating, configured to receive various equipment such as an electronic anemometer (202), an electronic wind vane (203), a video camera or a lightning rod.

[0068] A passage with a diameter (292) of at least 700 mm is left free in the carriage (220) and in the upper telescopic part (200) to allow access to the transfer platform (140) from inside the fixed mast (100) in order to carry out adjustment or maintenance actions.

[0069] To this end the upper telescopic part may include one or more access hatches (293, 294) shown in a simplified manner [Fig.2].

[0070] According to this embodiment, the rotating rigging is not designed to rotate and produce sail thrust, other than its air draft, when it is in the retracted position. The transition from one position to the other is carried out while the rotating rigging is not rotating.

[0071] On the other hand, regardless of the embodiment, the transition from the deployed position to the retracted position of the rotating rigging makes it possible to reduce its air draft and also to reduce a capsizing moment generated by the rotating rigging.

[0072] Sliding connection between sections

[0073] Regardless of the embodiment, the upper tubular section (120) and the lower tubular section (110) are linked by a sliding connection which, according to the embodiment examples presented, comprises a plurality of rails (121) linked to an inner face of the upper tubular section and slides (115) cooperating with the rails and fixed to the lower tubular section.

[0074] The role of this sliding connection is to maintain the relative positioning of the two sections in all their relative axial positions, between the retracted position and the deployed position, in order, on the one hand, to prevent a relative tilting of the upper tubular section with respect to the lower tubular section, a tilting which could lead to a buttressing and would block any relative movement, as well as to maintain the relative angular positioning of the two sections around the longitudinal axis of rotation so that the locking of the two sections in the deployed position can be carried out without difficulty.

[0075] The sliding connection between the two sections does not participate in the transmission of a driving torque around the longitudinal axis of rotation nor in the transmission of the sail thrust of the rigging, both being essentially taken up by the internal ferrule and the transfer platform to the fixed mast.

[0076] [Fig.3] according to an exemplary embodiment, the skins of the upper tubular sections and lower are made up of stiffened panels (311, 312, 321, 322), the stiffeners of said panels not being shown [Fig.3] to simplify the figure, which stiffened panels can be made up, according to embodiment variants, of a composite material or an aluminum alloy.

[0077] The stiffened panels can be assembled on longitudinal fittings (315, 325) by riveting or bolting.

[0078] According to one embodiment, the sliding connections are installed between the upper tubular section and the lower tubular section at the longitudinal fittings (315,325).

[0079] According to this embodiment, the rail (121) can be connected to the upper tubular section (120) by bolting it to an intermediate fitting (326) inserted into a longitudinal fitting (325) fixed to the upper tubular section. This assembly allows Adjusting the radial position of the rail (121) is achieved by radially moving the intermediate fitting (326) relative to the longitudinal fitting (325) of the upper tubular section. Once the radial adjustment is complete, the intermediate fitting (326) is locked relative to the longitudinal fitting (325) of the upper tubular section, for example by riveting.

[0080] According to this embodiment, the pad (115) is linked to a longitudinal fitting (315) of the lower tubular section by elastic buffers (316) of the "SILENTBLOC®" type.

[0081] The same rail (121) is taken up on two pads (115) mounted on the same fitting (315) and spaced apart from each other along the longitudinal axis of rotation by a distance between 1.5 and 2 times the outside diameter of the lower tubular section.

[0082] The adjustment of the radial position of the rail (121), by the relative position of the longitudinal fitting (325) and the intermediate fitting (326) as well as the flexible mounting of the pad (115) by means of the elastic buffers (316) make it possible to absorb the hyperstaticity of relative positioning of the sections.

[0083] Depending on the dimensions of the rotating rigging, 5 to 20 rail-shoe pairs are distributed over the circumference of the sections.

[0084] Section locking

[0085] The relative locking of the upper tubular section and the lower tubular section is achieved when the rotating rigging is in the deployed position.

[0086] According to one embodiment, the locking can be operated between an internal ferrule (145) fixed to the upper tubular section and a transfer platform (140) fixed to an upper end of the lower tubular section.

[0087] [Fig.4] According to this embodiment, the locking includes a locking rotation can be achieved by means of pads (451) fixed to either the inner shell (145) or the transfer platform (140), said pads extending substantially perpendicularly to an interface surface between the transfer platform and the inner shell and being configured to penetrate peripheral bores (455), angularly distributed, and made in either the transfer platform or the inner shell (145) opposite the pads (451). These pads (451) contribute in particular to the transmission of the driving torque for the rotation of the sections.

[0088] The locking mechanism further includes axial locking of the sections. According to this embodiment, the locking can be achieved by studs (452) carried by either the transfer platform (140) or the inner ferrule (145) and extending substantially perpendicularly to the interface surface between the transfer platform and the inner ferrule, studs which pass through either the transfer platform or the inner ferrule when the rigging is in position deployed, and which cooperate with nuts (465) so as to axially immobilize the lower tubular section and the upper tubular section relative to each other.

[0089] According to one embodiment, the rotational locking comprises at least 6 studs (451) and 24 pins (452) angularly distributed over the circumferences of the transfer platform (140) and the inner ferrule (145).

[0090] According to alternative embodiments, the nuts (465) are installed and tightened onto the ends of the studs (452) manually or this connection can be made by automated means.

[0091] [Fig.8] according to another embodiment, in which the mast (100) includes a telescopic part (200) around which the upper tubular section is guided in rotation, the transfer platform (140) includes a conical part (840) on its periphery, configured to cooperate with a conical ferrule (845) fixed inside the upper tubular section (120).

[0092] The conical part (840) of the transfer platform and the conical ferrule (845) linked to the upper tubular section (120) may include grooves (not shown) so as to achieve a dog clutch and a rotational connection of the upper tubular section with the transfer platform when the upper tubular section is in the deployed position.

[0093] This embodiment makes it possible to eliminate the slides and glides or to reduce their number.

[0094] An axial locking in the deployed position can, for example, be achieved between the mast (100) and the telescopic part (200) of said mast.

[0095] Motorization

[0096] [Fig.5] The motorization for the rotational drive of the rotating rigging is achieved by a direct drive torque motor (130), the stator of which is fixed to an upper end of the fixed mast (100) and the rotor connected to the lower tubular section (110).

[0097] A combined bearing (530) allows the rotational guidance of the lower tubular section (110) around the longitudinal axis of rotation (101) relative to the fixed mast (100) as well as the axial positioning of the lower tubular section relative to the fixed mast (100).

[0098] The use of a direct drive torque motor allows, in particular, for this motorization to be positioned at an upper end of the fixed mast (100), close to the transfer platform, thus avoiding any transmission of the rotational drive torque of the rotating rigging via the skins of the tubular sections.

[0099] This configuration also allows a passage with a diameter (192) of at least 700 mm to be maintained at an upper end of the fixed mast.

[0100] Example of implementation

[0101] [Fig.6A] installed on a ship (600) a rotating rigging (601, 602) as described above, extends from a deck of the ship (650) over a deployed height (610) of between 4 and 9 times a maximum diameter (620) of the upper tubular section (excluding Tom's disk at the top).

[0102] Retracting the telescopic part allows the height of the rotating rigging, when not used for ship propulsion, to be reduced by at least 30% and up to nearly 50% depending on the embodiment, thus improving visibility, reducing the ship's aerodynamic drag, and increasing the capsizing moment generated by the rotating rigging, i.e. increasing the ship's stability, particularly with regard to rolling.

[0103] The maximum diameter corresponds to the outside diameter of the upper tubular section (120), the outside diameter of the lower tubular section (619) being less than the outside diameter (620) of the upper tubular section, so that the diameter of the rotating rigging is higher on its portion furthest from the deck (650) of the ship.

[0104] This configuration is advantageous because it allows us to take advantage of a more favorable sail thrust than if the rotating rigging had a constant diameter or a decreasing diameter from the deck towards its top.

[0105] Indeed, [Fig.7A], according to its operating principle, the rotating rigging (601) produces a sail thrust (710) that is both perpendicular to the relative wind (701) to which it is subjected and to its axis of rotation.

[0106] On the example [Fig.7A], considering (in thought) the stationary ship (600) subjected to a starboard wind (701), the rotating rigging (601) produces a sail thrust (710) parallel to the longitudinal axis of the ship.

[0107] In practice, [Fig.7B], the ship moves forward in a propulsion direction (750), this propulsion being able to result from sail thrust alone or from the combination of this sail thrust with motorized means of propulsion of the ship.

[0108] Under these conditions, the rotating rigging is subjected to an apparent wind (702) resulting from the true wind (701) and the relative wind (703) produced by the displacement of the ship (600), and under these conditions the sail thrust (711) is no longer oriented in such a favorable manner.

[0109] However, the apparent wind perceived by the rotating rigging also varies in intensity with altitude according to a function of the type:

[0110] [Math.l] VM=V ( , (^f

[0111] With V(z) apparent wind speed at altitude z measured from the ship's deck

[0112] Z 0 a reference altitude (e.g. 10 m)

[0113] has an empirical coefficient a = 0.11

[0114] Thus the apparent wind speed (702) increases with altitude z but moreover, this wind shear along z makes its direction approach the direction of the true wind (701).

[0115] Also, using a diameter greater than that of the lower section for the upper section also presents an advantage with regard to the orientation of the sail propulsion force, particularly in crosswinds.

Claims

Demands

1. Rotating rigging of the Flettner type comprising: a fixed mast (100); a lower tubular section (110) of a first outside diameter (190) extending along a longitudinal axis of rotation (101); an upper tubular section (120) of a second inside diameter (191) extending along the longitudinal axis of rotation (101), the second inside diameter (191) being greater than the first outside diameter (190); a drive device (130) for the lower tubular section (110) rotating about the longitudinal axis of rotation (101) and a rotational guide (111, 112) for the lower tubular section (110) about the fixed mast (100); a linear displacement device (160, 161, 162, 260, 270) of the upper tubular section (120) relative to the lower tubular section (110), parallel to the longitudinal axis of rotation (101), between a retracted position and a deployed position;and an axial locking device (152) and a rotational locking device (151) of the upper tubular section (120) relative to the lower tubular section (110) in the deployed position.;

2. Rotating rigging according to claim 1, wherein the linear displacement device comprises at least one cable for hoisting (161) the upper tubular section and at least one lowering cable (162), the at least one cable for hoisting (161) and the at least one lowering cable (162) being wound around the same winch (160, 260).

3. Rotating rigging according to claim 1, wherein the drive device comprises a direct drive torque motor (130) linked to the fixed mast (100) at an upper end of the fixed mast.

4. Rotating rigging according to claim 3, wherein the fixed mast (100) is hollow and includes an internal passage of a diameter (192, 292) greater than 700 mm over its entire height.

5. Rotating rigging according to claim 1, comprising an upper telescopic part (200) in sliding connection with the fixed mast and a rotational guide of the upper tubular section (120) around the upper telescopic part (200).

6. Rotating rigging according to claim 1, wherein the lower tubular section (110) and the upper tubular section (120) are linked by a sliding joint (121, 115) configured to allow the upper tubular section (120) to slide relative to the inner tubular section (110) in a direction parallel to the longitudinal axis of rotation (101).

7. Device according to claim 6, wherein the sliding connection comprises a plurality of rails (121) distributed angularly on an inner circumference of the upper tubular section (120) and a plurality of pads (115) each pad being linked to an outer circumference of the lower tubular section (110) opposite a rail (121).

8. Rotating rigging according to claim 7, wherein each skid (115) is linked to the outer circumference of the lower tubular section (110) by a flexible connection comprising at least one elastic buffer (316).

9. Rotating rigging according to claim 1, wherein the locking device comprises a transfer platform (140) linked to the lower tubular section (110), at an upper end of the lower tubular section, and an inner ferrule (145) linked to the upper tubular section (120), the rotational locking device (151) being configured to rotationally link the transfer platform (140) and the inner ferrule (145) when the upper tubular section is in the deployed position.

10. Rotating rigging according to claim 9, wherein the axial locking device (152) is configured to axially link the transfer platform (140) and the inner ferrule (145) when the upper tubular section is in the deployed position.

11. Rotating rigging according to claim 9, wherein the transfer platform (140) comprises a conical portion (840) at the periphery and wherein the inner ferrule is a conical ferrule (845) configured to come into contact with the conical portion (840) when the upper tubular section is in the deployed position.

12. Rotating rigging according to claim 11, wherein the conical part (840) and the conical ferrule (845) comprise grooves configured to achieve a dog clutch between the conical part and the conical ferrule when the upper tubular section is in the deployed position.

13. Rotating rigging according to claim 5, wherein the upper telescopic part (200) comprises a non-rotating platform (201) at one apex.

14. Rotating rigging according to claim 13, wherein the non-rotating platform carries equipment selected from: an anemometer, a wind vane, a camera and a lightning rod.

15. Vessel (600) comprising a Flettner telescopic rotating rig (601, 602) capable of rotating about an axis of rotation (101) perpendicular to a deck (650) of the vessel, the rotating rig comprising a lower tubular section (110) and an upper tubular section (120) configured to slide coaxially with the lower tubular section (110) between a retracted position, where the upper tubular section is close to the deck of the vessel, and a deployed position where the upper tubular section is away from the deck of the vessel, in which an outside diameter (620) of the upper tubular section (120) is greater than an outside diameter (619) of the lower tubular section (110).

16. Vessel according to claim 15, wherein a deployed height (610) of the rotating rigging, measured from the ship's deck (650) when the upper tubular section is in the deployed position, is between 4 and 9 times the outside diameter (620) of the upper tubular section (120).

17. Vessel according to claim 16, wherein a retracted height (611) of the rotating rigging, measured from the deck of the vessel (650) when the upper tubular section is in the retracted position is between 50% and 70% of the deployed height (610).

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