Pitch control apparatus for variable pitch propeller

Fluid reaction surfaces (i.e. – impellers) – Interrelated controls for impeller and drive means – Pitch adjustment and throttle regulation with condition...

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416 28, 416 29, 416 30, 416 35, 416 36, 416 37, 416 44, 36443101, B64C 1130

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052096408

ABSTRACT:
A pitch control apparatus for a variable pitch propeller for drive connection to an aircraft engine, wherein an optimum rotation number of the engine is calculated in relation to a flight speed of the aircraft, an opening degree of the engine throttle and the density of atmospheric air in flight of the aircraft to maximize a thurst force acting on the aircraft, and wherein a pitch angle of the propeller blade is controlled in such a manner that the rotation number of the engine becomes substantially equal to the optimum rotation number.

REFERENCES:
patent: 2619183 (1952-11-01), Chillson et al.
patent: 2640550 (1953-06-01), Knapp et al.
patent: 2667228 (1954-01-01), Wood et al.
patent: 3589830 (1971-06-01), Mogren et al.
patent: 4958289 (1990-09-01), Sum et al.
patent: 5029091 (1991-07-01), Schneider et al.
patent: 5061212 (1991-10-01), Morgenthaler et al.

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