Speed and collective pitch bias of helicopter longitudinal...

Details Speed and collective pitch bias of helicopter longitudinal... Speed and collective pitch bias of helicopter longitudinal...

B - Operations, Transporting

64

C

244/16

B64C 11/34 (2006.01) G05D 1/08 (2006.01)

Patent

CA 1100925

SPEED AND COLLECTIVE PITCH BIAS OF HELICOPTER LONGITUDINAL CYCLIC PITCH ABSTRACT A bias actuator, such as an extensible link, in the longitudinal cyclic pitch channel of a helicopter is provided with inputs as a function of airspeed multiplied inversely with collective pitch, and as a function of the rate of change of collective pitch stick position, so as to enforce positive angle of attack and speed stability and positive static pitch trim gradient and to decouple col- lective pitch from the longitudinal cyclic pitch channel at cruise airspeeds, the invention, inter alia, adverse control effects of tail stabilizer surfaces at cruise speeds. A pair of indicators display bias commands and actual bias responses. S-3062

321501

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