An unmanned aircraft (100) according to the present disclosure is equipped with a flight propeller (2) and includes a main body (1), a locomotion unit having an aquatic locomotion mechanism and a terrestrial locomotion mechanism independent of the flight propeller, and a connector that connects the main body and the locomotion mechanisms.

An unmanned aircraft (100) according to the present disclosure is equipped with a flight propeller (2) and includes a main body (1), a locomotion unit having an aquatic locomotion mechanism and a terrestrial locomotion mechanism independent of the flight propeller, and a connector that connects the main body and the locomotion mechanisms.

An aircraft landing gear bay door 140 including an attachment mechanism suitable for pivotally mounting the door to an aircraft, a first side 141 arranged to face inwardly in relation to the aircraft landing gear bay when the door is closed and face towards one side of a main leg of the landing gear when the door is open and the landing gear is deployed, and a second opposite side 142. The shape formed from the first and second sides provides an aerofoil profile of the door. The invention also provides an aircraft landing gear arrangement 100, an aircraft 1000, methods of operating an aircraft and a method of reducing noise.

An aircraft landing gear bay door 140 including an attachment mechanism suitable for pivotally mounting the door to an aircraft, a first side 141 arranged to face inwardly in relation to the aircraft landing gear bay when the door is closed and face towards one side of a main leg of the landing gear when the door is open and the landing gear is deployed, and a second opposite side 142. The shape formed from the first and second sides provides an aerofoil profile of the door. The invention also provides an aircraft landing gear arrangement 100, an aircraft 1000, methods of operating an aircraft and a method of reducing noise.

A clip for a rotor disk of a brake assembly, the clip comprising: a first half comprising a first sheet metal strip having a body portion and a first end and a second end bent in a first direction relative to the body portion; and a second half comprising a second sheet metal strip having a body portion having a length the same as the length of the body portion of the first sheet metal strip, the second sheet metal strip having a first end and a second end bent in a second direction, opposite to the first direction, relative to the body portion of the second sheet metal strip; and wherein one of the first end of the first sheet metal strip and the first end of the second sheet metal strip is provided with a first pin protruding from the end.

A clip for a rotor disk of a brake assembly, the clip comprising: a first half comprising a first sheet metal strip having a body portion and a first end and a second end bent in a first direction relative to the body portion; and a second half comprising a second sheet metal strip having a body portion having a length the same as the length of the body portion of the first sheet metal strip, the second sheet metal strip having a first end and a second end bent in a second direction, opposite to the first direction, relative to the body portion of the second sheet metal strip; and wherein one of the first end of the first sheet metal strip and the first end of the second sheet metal strip is provided with a first pin protruding from the end.

A wingless vertical take-off and landing (VTOL) vehicle has a main body including airfoil sections on either side of a central module in which a load may be carried. Articulated forward thrust systems are mounted on a leading edge of the main body and lateral members are located on either side of the main body and form winglets. At least one rear vertical-thrust system may also be provided and, in one embodiment, is mounted in an aperture aft of the central module. The forward thrust systems transition between a vertical flight configuration and a horizontal flight configuration. The lateral members are configured as both vortex-damping members and also to channel backwash from the forward thrust systems over the airfoil formed by the main body.

A wingless vertical take-off and landing (VTOL) vehicle has a main body including airfoil sections on either side of a central module in which a load may be carried. Articulated forward thrust systems are mounted on a leading edge of the main body and lateral members are located on either side of the main body and form winglets. At least one rear vertical-thrust system may also be provided and, in one embodiment, is mounted in an aperture aft of the central module. The forward thrust systems transition between a vertical flight configuration and a horizontal flight configuration. The lateral members are configured as both vortex-damping members and also to channel backwash from the forward thrust systems over the airfoil formed by the main body.

A flying car that does not require complex transformation between a car and an aircraft, the flying car can quickly take off from a land, such as road or parking, and can land on the road or parking. The flying car is of triangular shape having a broad front and narrow rear. Three motorized members are coupled to three corners of a frame of the flying car. Each of the three motorized members includes a wheel assembly that includes a wheel and a wheel frame, an inner ring and an outer ring coupled to each other, and both mounted to the wheel frame. A fan mounted on the inner ring and one or more turbines mounted on the outer ring.

A landing gear system includes a drive shaft extending through an axle. A wheel with a drive surface is rotatably coupled to the axle. A drive assembly, which has disengaged and engaged states, includes a drive element and an idler element. The drive element, which has an engagement feature, is coupled to the drive shaft for rotation about an axis. The engagement feature has first and second diameters when the drive assembly is in the disengaged and engaged states, respectively. The idler element is frictionally engaged with the engagement feature of the drive element to transfer rotation of the drive element to the wheel when the drive assembly is in the engaged state. The idler element is disengaged from at least one of the engagement feature of drive element and the wheel when the drive assembly is in the disengaged state.