The illustrative examples provide a slat movement system for use in an aircraft. An aircraft comprises a wing having a fixed edge and a wing front spar, and a moveable slat connected to the wing by a four bar linkage and a slat arm, the slat arm movable along a track comprising a slot terminating prior to the wing front spar.

Systems, devices, and methods for an extruded wing protection and control surface comprising: a channel proximate a leading edge of the control surface, a knuckle disposed about the channel, a leading void, a trailing void, and a separator dividing the leading void and the trailing void; and a plurality of notches disposed in the extruded control surface proximate the leading edge of the control surface.

Systems, devices, and methods for an extruded wing protection and control surface comprising: a channel proximate a leading edge of the control surface, a knuckle disposed about the channel, a leading void, a trailing void, and a separator dividing the leading void and the trailing void; and a plurality of notches disposed in the extruded control surface proximate the leading edge of the control surface.

An apparatus for in-situ testing of a linear actuator configured to exert an actuation force in an actuation direction by movement of a first part of the actuator relative to a second part of the actuator. The apparatus includes a test device, a test actuator and a measurement device. The test device includes a first surface configured to contact the first part of the actuator, and a second surface configured to contact the second part of the actuator. The second surface is moveable relative to the first surface to alter a distance therebetween. The test actuator is configured to exert a test force in a direction opposite to the actuation direction, the test force being to drive movement of the second surface away from the first surface. The measurement device is for detecting a change in the distance between the first surface and the second surface.

Aspects of the present disclosure relate to a skewed roller impeller cage including a metallic ring with radially arranged slots in which rollers are positioned. Impeller shaped channels are defined around a top side of the cage to force fluid to circulate from an outer diameter of the cage to an inner diameter of the cage and vice versa. Cutouts defined at the inner diameter of the cage allow fluid to circulate from the top side of the cage to the bottom side due to centrifugal forces moving the fluid from the inner diameter back to the outer diameter of the cage to allow for continuous circulation of the fluid about the cage.

A compound harmonic drive assembly includes a ring gear assembly, a wave generator, a flex spline, and a rolling element. The wave generator is received within the ring gear assembly along the rotational axis. The wave generator has a body that extends radially between an exterior surface and an interior surface. The body defines at least one groove that extends radially from the exterior surface towards the interior surface. The flex spline is disposed between the ring gear assembly and the wave generator. The rolling element is disposed between the wave generator and the flex spline.

A compound harmonic drive assembly includes a ring gear assembly, a wave generator, a flex spline, and a rolling element. The wave generator is received within the ring gear assembly along the rotational axis. The wave generator has a body that extends radially between an exterior surface and an interior surface. The body defines at least one groove that extends radially from the exterior surface towards the interior surface. The flex spline is disposed between the ring gear assembly and the wave generator. The rolling element is disposed between the wave generator and the flex spline.

An aircraft includes a wing. The wing includes an aileron pivotally connected to a trailing edge of the wing, and a Lam aileron pivotally connected to the trailing edge of the wing. The aircraft includes a motor connected to the Lam aileron and configured to rotate the Lam aileron. The aircraft includes a controller configured to detect a deflection of the aileron from a neutral position, calculate a target deflection for the Lam aileron using the deflection of the aileron, and cause the motor to rotate the Lam aileron to the target deflection.

An aircraft wing is disclosed including a main wing element and a movable wing tip device attached to a tip end of the main wing element. The movable wing tip device can move relative to the main wing element to vary a span of the aircraft wing. An inductive coupler is arranged to inductively transmit data and/or power between the main wing element and the movable wing tip device. The inductive coupler removes the need for wires and cables to pass across a joint between the main wing element and a movable wing tip device. Additional embodiments include a method of maintenance, and a method of operating the aircraft wing to transmit data and/or power between the main wing element and the movable wing tip device.

An aircraft wing is disclosed including a main wing element and a movable wing tip device attached to a tip end of the main wing element. The movable wing tip device can move relative to the main wing element to vary a span of the aircraft wing. An inductive coupler is arranged to inductively transmit data and/or power between the main wing element and the movable wing tip device. The inductive coupler removes the need for wires and cables to pass across a joint between the main wing element and a movable wing tip device. Additional embodiments include a method of maintenance, and a method of operating the aircraft wing to transmit data and/or power between the main wing element and the movable wing tip device.