The patent concerns a systems for determining in flight and continuously indicating to a helicopter pilot the lift margin of his craft. Lift margin is the difference between the maximum available lift and the effective gross weight, both expressed in pounds, and is obtained from the ratio of lift to horsepower and the variation of the relative performance of the engine under ambient conditions. Input parameters of topping torque, hover torque, outside air temperature, static pressure, fuel weight, and rotor speed are both theoretically and empirically derived and combined to obtain maximum available lift and effective gross weight.
Helicopter Lift Margin Determining System
1972
15 pages
Report
No indication
English
Government Inventions for Licensing , Aircraft , Air Transportation , Transportation Safety , Human Factors Engineering , Patents , Helicopters , Flight instruments , Lift , Analog computers , Display systems , Aviation safety , Human factors engineering , Lift margin , Aircraft onboard checkout systems , PAT-CL-73-178-H
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