A wheel drive system for ground movement of an aircraft includes a motor system and a clutch system. The motor system, which is borne by an unsuspended part of a landing gear strut of the aircraft, includes an electric motor and a reduction gearing system. The clutch system, which connects an output shaft of the electric motor to a wheel of the aircraft via the reduction gearing system, includes a dog-clutch and a translational movement system. The dog-clutch includes a drive part, which is secured to the motor system, and a receiving part, which secures to a tire of the wheel. The translational movement system moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part.

An aircraft spring assembly having a spring, an end fitting including a spring engagement formation arranged to be mechanically coupled to an end region of the spring and a coupling formation for coupling the spring assembly to an aircraft anchor point. The coupling formation includes a load bearing surface via which loads from the anchor point can be transmitted into the spring assembly. The assembly further includes an integral damping member provided within the load path between the load bearing surface of the coupling formation and the end region of the spring.

An aircraft spring assembly having a spring, an end fitting including a spring engagement formation arranged to be mechanically coupled to an end region of the spring and a coupling formation for coupling the spring assembly to an aircraft anchor point. The coupling formation includes a load bearing surface via which loads from the anchor point can be transmitted into the spring assembly. The assembly further includes an integral damping member provided within the load path between the load bearing surface of the coupling formation and the end region of the spring.

Aircraft landing gear (1) comprising: an axle shaft (2); a strut (3) extending along a main strut axis (Z) and having a first part (3a) carrying the said axle shaft (2) and a second part (3b); a main damper (5) designed to damp axial movements of the first strut part (3a) with respect to the second strut part (3b); a first secondary damper (6a) distinct from the said main damper and designed to damp a movement of angular oscillation, about the axis (Z).

The first secondary damper (6a) is carried by the first strut part (3a) and comprises: an inertial mass (M); and means (7a) of connecting the inertial mass (M) to the first strut part (3a) which means are designed to damp rotational movements of this inertial mass (M) about the axis (Z).

A unmanned aerial vehicle may include a fuselage body, a top lens structure at a top of the fuselage body, the top lens structure protruding from the top of the fuselage body; and a bottom lens module at a bottom of the fuselage body, the bottom lens module protruding from the bottom of the fuselage body.

A unmanned aerial vehicle may include a fuselage body, a top lens structure at a top of the fuselage body, the top lens structure protruding from the top of the fuselage body; and a bottom lens module at a bottom of the fuselage body, the bottom lens module protruding from the bottom of the fuselage body.

Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means.

The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the tire (12a) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means.

The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the rim (12b) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

A strut assembly includes a piston and a bearing housing around the piston. The bearing housing may also comprise a groove and a tapered surface opposite the groove. A bearing may be in the groove and proximate the piston. An outer cylinder may be around the bearing housing. The angle of the tapered surface may be based on a deflection angle between the outer cylinder and the piston. A wear plate may be around the tapered surface. An elastic material may be disposed between the tapered surface and the wear plate. The bearing housing may comprise a titanium alloy. The bearing housing may be configured to flex towards the wear plate.

A unmanned aerial vehicle may include a fuselage body, a top lens structure at a top of the fuselage body, the top lens structure protruding from the top of the fuselage body; and a bottom lens module at a bottom of the fuselage body, the bottom lens module protruding from the bottom of the fuselage body.