Patent ID: 6685138
Filing Date: 2004-02-03
Classification: B64C,Y02T

Abstract:
Apparatus for providing actuation power to an aircraft flight control surface, the apparatus comprising:a first actuator; a second actuator including a bypass mode and an assist mode, the mode of the second actuator being at least partially based on an internal pressure differential across the first actuator; a mode select valve for selecting between the bypass mode and the assist mode for the second actuator; a solenoid valve operatively associated with the mode select valve such that energizing the solenoid valve causes the mode select valve to select the other one of said modes for the second actuator; the first actuator providing the actuation power for the aircraft flight control surface when the second actuator is in the bypass mode; and the first and second actuators providing the actuation power for the aircraft flight control surface when the second actuator is in the assist mode.