37 results about "Forward-swept wing" patented technology

An oblique wing aircraft (1) designed for reduced surface area to volume ratio. The aircraft has an oblique wing comprising a forward swept wing segment (27) on one side of the wing and an aft swept wing segment (29) on the opposite side of the wing. A center oblique airfoil section (25) connects the forward and aft swept wing segments. The center oblique airfoil section has a larger chord near its centerline than the chords of either of the forward or aft swept wing segments. The chord of the center oblique airfoil section tapers down more rapidly than the forward or aft wing segments as the center oblique airfoil section extends outboard toward the forward and aft swept wings. The center oblique airfoil section is not shaped solely to function as a circular fairing to fill the gap between an oblique wing and a fuselage at different oblique wing angles, nor is it a second wing in an X wing configuration. Preferably, the aircraft is an all-wing aircraft.

The vertical takeoff and landing unmanned aerial vehicle includes a pair of selectively rotatable ducted fans and a selectively rotatable thrust vectoring nozzle providing vertical takeoff and landing for an unmanned aerial vehicle or a similar type of aircraft. A pair of fixed forward-swept wings are mounted on a rear portion of a fuselage, and a pair of canards are mounted on a top end of a forward portion of the fuselage. The pair of ducted fans are respectively mounted on free ends of the pair of canards, and are selectively rotatable about an axis parallel to a pitch axis of the fuselage. An engine is mounted in the rear portion of the fuselage, and a thrust vectoring nozzle is mounted on the rear portion of the fuselage for directing thrust exhaust from the engine. The thrust vectoring nozzle is selectively rotatable about an axis parallel to the pitch axis.

A multirotor aircraft 10 that is adapted for vertical take-off and landing, comprising a fuselage, a thrust producing units assembly that is provided for producing thrust in operation, and a forward-swept wing that comprises a portside half wing and a starboard side half wing. Each one of the portside and starboard side half wings comprises an inboard section that is connected to the fuselage and an outboard section that forms a wing tip. The inboard sections of the portside and starboard side half wings form a central wing region. The portside and starboard side half wings are respectively connected in the region of their wing tips to an associated outboard wing pod that supports at least two non-tiltably mounted thrust producing units of the thrust producing units assembly.

The invention provides an airplane with a combined-wing layout of a flying wing and forward-swept wings. The airplane is characterized in that thin-wing type vertical columns A and B are additionally arranged at the 70% wingspan positions of the outer sides of two side wings of a flying-wing airplane with backward-swept wings, a thin-wing type vertical column C is additionally arranged at the tail part of the flying-wing airplane, and horizontal forward-swept wings are additionally arranged at the top ends of the three thin-wing type vertical columns A, B and C so as to form the combined-wing layout of the flying wing and the forward-swept wings; elevators are arranged on the horizontal forward-swept wings and a rudder is arranged on the vertical column C; a duct type air inlet channel is adopted on the upper wing surface of the flying wing, and cracking type drag rudders are distributed at the thin-wing type vertical columns A and B. The airplane provided by the invention has the advantages that under the condition that the structure strength is effectively guaranteed, the effective aspect ratio of the wings is increased, the induced drag is reduced, the lift-drag characteristics of the airplane are improved, the stealth performance of the airplane is improved, direct-force control of the airplane in the vertical direction is realized and the detecting accuracy under the maneuvering condition is improved.

The invention provides a flight control method of a deformable unmanned aerial vehicle. The deformable unmanned aerial vehicle has a canard type telescopic forward-swept wing and single vertical fin aerodynamic arrangement; according to the adjustment and analysis of a root-locus method, a high-low speed deformable unmanned aerial vehicle can perform the adjustment on parameters of a controller through a design method of a low-speed controller, and therefore the design requirement on the controllers under two flight speeds can be met. Matching the deformation time and the control time of an engine is part of a control strategy of the deformable unmanned aerial vehicle; and as shown in the analysis of the flight mechanics design, the thrust of the engine is changed prior to implementing the process and the strategy under the deformation time.

A fixed-wing VTOL aircraft features a forward-swept wing configuration coupled with a tripod arrangement of the engines (two forward, one rear), a forward-swept empennage or tail assembly, and a forward canard. The engines and wings/empennage are located relative to each other such that the engine outlet nozzles, which pivot downwardly to provide lift-off thrust, are minimally covered by the wings/empennage, if at all. The wings and empennage may include lifting fans to supplement lift and provide pitch and/or roll control.

The embodiments of the present invention disclose a folding mechanism for an aircraft, and a control method thereof, and relate to the folding mechanism design technology in aerospace aircrafts. A purpose of the present invention is to solve the problem of complicated folding mechanism. According to the folding mechanism, a fixed guide rail is fixed at the bottom portion of an aircraft body, a sliding block can slide back and forth at both ends of the fixed guide rail, one ends of a swept-back wing and a forward-swept wing at the same side of the aircraft body are fixed through a rotation shaft, the swept-back wing and the forward-swept wing at the same side of the aircraft body form a connection rod mechanism through the rotation shaft, the other end of the swept-back wing is fixed at oneend of the fixed guide rail through a vertical shaft, the swept-back wing can rotate around the vertical shaft, the other end of the forward-swept wing is fixed on the sliding block, and an actuatingcylinder is fixed on the fixed guide rail.

The invention discloses a variable-area canard forward-swept wing morphing aircraft which adopts a canard layout. The plane shape of an airfoil is quadrilateral, and when wings are completely retracted, the wings and a canard wing are connected to form a delta wing. The canard wing is arranged at the head of a fuselage. The wings on the two sides of the tail of the fuselage can be synchronously folded forwards towards the inner fuselage side around a wing body connecting rotating shaft or unfolded backwards towards the outer side. When the wings are folded forwards, the wings are gradually folded forwards to reduce the sweepforward angle, the wings are completely attached to the fuselage, and the whole aircraft is of a curved streamline aerodynamic configuration. When the wings are completely unfolded into forward-swept wings, the wing span of the aircraft is greatly increased, so that the aircraft can ensure large lift force. Double vertical tails are symmetrically arranged on the rear portion of the fuselage, lifting ailerons are installed at the rear end of the fuselage and located on the rear portions of the two vertical tails, and an air inlet channel is located below the fuselage. Through reasonable cooperation of the variable-area canard forward-swept wing variants, the aircraft has small flight resistance when the wings are in the unfolded state and the folded state, and the flight flexibility of the aircraft is improved.

The invention discloses an aircraft with folding fan-shaped wings, which relates to the field of aircrafts. The aircraft mainly comprises a fuselage, a left wing-connecting mechanism, a left forward-swept wing, a left wing skeleton, a left wing skin, a right wing-connecting mechanism, a right forward-swept wing, a right wing skeleton, a right wing skin, an empennage and a jet engine. The aircraft adopts a fan-shaped wing design method in cooperation with the special connecting structures to achieve the folding function of the wings of the aircraft, and moreover, an opening and closing angle and an inclination angle can be freely adjusted as well; by means of the specially designed wing-connecting structures and the fan-shaped folding wing design, the space occupied by the wings of the folded aircraft can be small, and furthermore, the wingspans of the left wing and the right wing can be freely unfolded and folded; moreover, the wings can also be turned up and down to freely adjust windward angles, so that the maneuverability and flexibility of the aircraft flying in the air can be increased; and furthermore, the size of the fuselage is small after the wings are folded. The aircraft is suitable for being applied in the aspect of ship-borne fighter plane designs or small passenger planes, and has high application value.

The invention relates to the technical field of air vehicles and in particular relates to an air vehicle airfoil folding mechanism. The air vehicle airfoil folding mechanism comprises a transformationsystem, wherein the transformation system is arranged between a fuselage and a wing of the air vehicle; the transformation system comprises a plurality of groups of folding hinges and a plurality offolding planes; the transformation system is movably connected with the fuselage and the wing of the air vehicle respectively through the folding hinges; in a transformation process of the transformation system, a front edge of the wing can keep moving along a tail edge of the transformation system all the time; advanced aerodynamic properties of a forward-swept wing and a folding wing are integrated to realize a novel forward-swept wing and folding wing combinatory transformation manner; the flight stability and the wide-speed-region flight performance are improved.

The invention discloses a canard forward-swept wing unmanned transport plane, relates to the field of aircraft design, and particularly relates to a canard forward-swept wing unmanned transport plane which comprises a plane body unit, a wing unit, an undercarriage unit and a power unit. The transport plane adopts a canard layout, and the length of the plane body is shorter under the condition of having the same longitudinal balancing capacity as a conventional layout, so that the plane body is higher in strength and lighter in weight. The wings adopt sweepforward wings, so that the average pneumatic chord positions of the wings move forwards, the balancing of the gravity center of the unmanned aerial vehicle is facilitated, and the problems of unreasonable aircraft weight distribution and small available gravity center range of the aircraft due to the fact that an engine of a common canard aircraft can only be arranged backwards and the gravity center of the aircraft is balanced through the weight of the engine are solved.

The invention discloses a large-capacity strong oil circulation air cooler. The heat transfer core element adopts an elliptical bimetal composite integral finned tube structure, and corrugated notches are opened on the fins of the cooling tubes, and internal ribs are juxtaposed in the tubes. There is a vortex generator, the fan blade of the cooler is molded with high-strength aluminum alloy plate, and the fan motor adopts an optimized combination of three types of motors. The centrifugal force of the fan is loaded into the mainstream, which ensures the laminar flow state, reduces the speed, and forms a cooler with low noise and large capacity. Under the same wind speed and oil flow conditions, the overall heat transfer coefficient K value is higher than that of circular finned tubes of the same specification. Products increased by 30%.

The invention relates to an active load reduction large wind electric generator blade, and belongs to the technical field of wind power generation equipment. The technical problem that according to anexisting method, wind loads borne by blades are not effectively reduced, and under the strong wind, the wind electric generator blades are prone to breaking can be solved. The active load reduction large wind electric generator blade comprises a wind turbine blade and a control circuit, and further comprises multiple structure fans, the structure fans are mounted in the wind turbine blade, the control circuit is mounted in the wind turbine blade and is attached to the inner wall of the wind turbine blade, one end of the control circuit is connected with the structure fans, the other end of the control circuit is connected with a controller, and each structure fan comprises a fan blade, a fan blade fixing nut, a fan blade frame, a clamping screw, a motor, a support and a structure frame. The active load reduction large wind electric generator blade has the advantages that the pressure difference between a front swept wing area and a rear swept wing area of the wind turbine blade can beadjusted, and the load borne by a blade structure can be changed.

The invention discloses a linked-wing small solar unmanned aerial vehicle. The unmanned aerial vehicle comprises a front fuselage and a rear fuselage, front-end sweepback wings and rear-end sweepforward wings, a double-engine motor and propellers which are arranged at the front ends of the two fuselages, bridge arms which are connected with the front and rear wing sections, two motors and propellers which are arranged on the outer sides of the left bridge arm and the right bridge arm, and an inverted vertical fin which is connected with the rear fuselage. The upper surfaces of the left sweepback wing, the right sweepback wing, the left sweepforward wing and the right sweepforward wing of the wings are each provided with a solar cell panel set, and energy is provided for continuous flight of the unmanned aerial vehicle. During takeoff, the left and right propellers can be used for vertical takeoff and landing, so that the usability and takeoff stability of the aircraft are improved; the maneuvering characteristics and higher reliability of the aircraft are improved through control of multiple groups of propellers; the inverted vertical fin can replace an undercarriage as a support, so that the structure is simplified and the weight is saved; the unmanned aerial vehicle is not provided with an undercarriage, can realize short-distance throwing flight without a runway requirement during take-off, realizes gliding landing during landing, and also can realize vertical take-off and landing and hovering.

The invention discloses a sweepforward canard flying wing aerodynamic layout unmanned aerial vehicle, and the unmanned aerial vehicle comprises a vehicle body, main wings, edge strip wings, full-motion canard wings and full-motion vertical tail wings, wherein the main wings, the edge strip wings, the full-motion canard wings and the full-motion vertical tail wings are connected with the vehicle body, and the full-motion canard wings and the full-motion vertical tail wings are arranged at the front end of the vehicle body; the main wings and the edging wings are arranged at the rear end of thefuselage and are of an integrated structure; the flying wing aerodynamic layout, the canard aerodynamic layout and the sweepforward wing aerodynamic layout are fused, so the flying performance of thefixed-wing aircraft is well improved, the contradiction between sweepforward wing aerodynamic divergence and structural quality is solved, the problems that the maximum lift coefficient Clmax of the flying wing layout is too small and the pitching maneuverability is poor are solved, and the problem that a canard layout structure is complex is solved; the maneuvering performance, the loading capacity, the low-speed performance and the like of the canard layout structure are greatly improved, and compared with a conventional aerodynamic layout fixed-wing unmanned aerial vehicle, the effective load of the canard layout structure is increased by 20%, the take-off and landing distance is shortened by 35%, the maximum flight speed is increased by 5%, and the minimum flight speed is reduced by 30%.

The invention belongs to the technical field of machinery and relates to a deep-sea mineral deposit collection system. The problem that the existing manganese nodule collector has high collection costand low efficiency is solved. The collection system comprises an underwater glider and a collecting shovel; the underwater glider comprises a machine body; the head of the machine body is provided with a spherical vortex generator; forward-swept wings are arranged on the two sides of the middle part of the machine body; a storage cavity for storing manganese nodule is formed in the machine body;the collecting shovel is movably arranged at the bottom of the machine body; and a driving source capable of driving the collecting shovel to open and close the storage cavity is arranged on the machine body. The deep-sea mineral deposit collection system can effectively reduce the collection cost and can improve the collection efficiency.