Propeller control system

Details Propeller control system Propeller control system

1985-06-07

1987-02-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Impeller rotation speed responsive

416 50, B64C 1140

Patent

active

046454209

ABSTRACT:
A propeller control system, including a propeller governor, overspeed governor, and a bleed valve, is provided to control the flow of fluid under pressure from a pump to an hydraulically controlled, variable pitch propeller driven by a gas turbine engine. Under normal operating condition, the propeller governor controls the pressure of the fluid supplied to the propeller, adjusting its pitch as needed to maintain constant speed operation. The overspeed governor prevents overspeeding of the propeller and engine in the event that the propeller governor becomes inoperative, and, in the event that both governors become inoperative, the bleed valve prevents sudden increases in fluid pressure, attendant with the failure, from adjusting the pitch of the propeller towards an overspeed position.

REFERENCES:
patent: 3115938 (1963-12-01), Fischer et al.
patent: 3115939 (1963-12-01), Berninger et al.
patent: 3387663 (1968-06-01), Barnes et al.
patent: 3389641 (1968-06-01), Barnes
patent: 3575529 (1971-04-01), Bierman
patent: 4588354 (1986-05-01), Duchesneall et al.

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