Aeronautics and astronautics – Aircraft control
Patent
1983-09-26
1986-06-17
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft control
244 78, 244223, B64C 1336, B64C 1346
Patent
active
045951586
ABSTRACT:
A flight control surface (1) is supported from an aircraft frame structure (12), for pivotal movement about a hinge axis. The surface (10) is deployed against an aerodynamic load which is a function of surface deflection and imposes a torque on the flight control surface (10) wanting to rotate it back to a neutral trim position. A counterbalancing hydraulic actuator (16, 16', 226, 334, 372, 402) is connected between the frame structure (12) and the flight control surface (10). This actuator (16, 16', 226, 334, 372, 402) is oriented to oppose a counterbalancing torque on the flight control surface (10) acting in opposition to the torque imposed by the aerodynamic load. A controllable, separate actuator (34, 312, 422) is interconnected between the frame structure (12) and the flight control surface (10) and is operated for positioning the flight control surface (10).
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Barefoot Galen L.
Barnard Delbert J.
The Boeing Company
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