Propeller phase control apparatus

Details Propeller phase control apparatus Propeller phase control apparatus

1987-12-22

1990-06-19

Black, Thomas G.

Boots, shoes, and leggings

416 34, 416 35, 60702, B64C 1150

Patent

active

049348256

ABSTRACT:
Propeller phase control apparatus for use on multi-engine aircraft having, for each engine, an electronic engine control (EEC) for providing an EEC command speed and phase (S/P) signal to control propeller phase and shaft speed, and a speed and phase control (SPC) for regulating the propeller's blade pitch angle to adjust the shaft speed thereof in dependence on the EEC command S/P signal value, includes: a SYNCHROPHASER Reference Unit (SRU) having a signal processor with signal memory, the memory including stored signals definitive of a speed and phase algorithm, the signal processor calculating a common SRU command S/P signal value for all SPCs in accordance with the algorithm and in dependence on the sensed values of selected flight data indicative of engine performance, and further includes an electronic switch for each SPC, for selecting either the SRU command S/P signal of the engine's EEC command S/P signal for presentation to the SPC.

REFERENCES:
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patent: 3589832 (1971-06-01), Harris
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patent: 3984986 (1976-10-01), Reas
patent: 3986363 (1976-10-01), Beaman et al.
patent: 4236115 (1980-11-01), Nelson
patent: 4245955 (1981-01-01), Lambertson
patent: 4412422 (1983-11-01), Rossi
patent: 4653981 (1987-03-01), Harner et al.
patent: 4659283 (1987-04-01), Niessen et al.

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