Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Patent
1976-02-03
1978-01-10
Kunin, Stephen G.
Aeronautics and astronautics
Aircraft, heavier-than-air
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
244175, 244197, 318591, B64C 1134, G05D 108
Patent
active
040675173
ABSTRACT:
The automatic heading retention mode of operation of a flight control system for a rotary wing aircraft is discontinued and reestablished through the use of logic circuitry responsive to the bank angle of the aircraft and to the force applied to a control stick by the pilot. When the bank angle of the aircraft exceeds a preselected minimum and the lateral force applied to the cyclic pitch stick also exceeds a predetermined minimum the logic circuit operates to isolate the heading hold control from heading error signals and the heading retention mode of operation is automatically resumed when both of the bank angle and stick force fall below the preselected minimum levels. The invention may also encompass the application to the control mechanism of signals which will cause the aircraft to perform coordinated turns above a preselected minimum airspeed.
REFERENCES:
patent: 3072369 (1963-01-01), Alderson
patent: 3386689 (1968-06-01), Parker et al.
patent: 3521839 (1970-07-01), Diani
patent: 4003532 (1977-01-01), Adams, Sr. et al.
Kunin Stephen G.
United Technologies Corporation
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