A braking device for a flight control system is provided, the flight control system comprising a drive shaft for applying a drive torque to a flight control surface. The braking device comprises a housing component comprising a first braking surface; and a...

A system architecture for a backup thrust reverser actuation system control is provided. The system architecture includes an AC power supply (101, 201) of an aircraft, a power supply (102, 202) and a motor control (103, 203) adapted to control an electric ...

An actuator arrangement comprises an epicyclic gear set 4a, 4b including a sun gear 7, at least one planet gear 9 in meshing engagement with the sun gear 7, and a ring gear 3 in meshing engagement with the planet gear 9, the planet gear 9 being carried by ...

A brake test method is disclosed for use in testing the operation of a brake of a drive system comprising a motor (14) operable to drive a pair of drive shaft arrangements (18, 20) for rotation, an inboard brake (26) associated with the motor (14), a first...

A control system comprises a TRAS actuator 14, a VAFN actuator 40, and a control arrangement 52 operable to control the operation of the TRAS actuator 14 and the VAFN actuator 40, wherein at least one control circuit 54 of the control arrangement 52 is a c...

A thrust reverser drive arrangement is described for use in driving a thrust reverser cowl (10) for movement relative to first and second guide tracks (12), the drive arrangement comprising a first actuator (16a) located, in use, close to the first guide t...

A thrust reverser drive arrangement for driving a thrust reverser cowl for movement relative to first and second guide tracks is described which comprises a first actuator (16a) located, in use, close to the first guide track (12), a second actuator (16b) ...

The assembly includes a return line which returns hydraulic fluid displaced from lower pressure side of a double-action hydraulic piston and cylinder device (16) to the high pressure side of the device in addition to fluid supply from a pressure source (28...

A reactive power compensator is provided which uses a power converter to deliberately draw or supply out of phase currents such that these can develop voltage drops of a desired phase angle across the reactance of a cable, to improve the total voltage loss...