Propulsor pitchlock and feather stop

Details Propulsor pitchlock and feather stop Propulsor pitchlock and feather stop

1991-07-31

1992-11-10

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

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

Impeller rotation speed responsive

416154, 416157R, B64C 1132, B64C 1138

Patent

active

051619482

ABSTRACT:
A pitch change actuation system for changing the pitch of the blades (16) of a prop-fan propulsor (10) comprises a translating pitch change actuator (30) and a flexible feather latch member (50) including a feather stop (56) and a feather latch (58), the feather latch member (50) being selectively releasable so as to permit the pitch change actuator (30) to drive the blades (16) through feather to a desired reverse pitch setting. Pitchlock lugs (96) and (98) operatively engage a pitchlock screw lug (97) on a pitchlock screw (80) to provide pitchlock screw stops at full reverse pitch and feather, respectively, with the pitchlock lug (98) being selectively displaceable so as to permit the pitchlock screw (80) to rotate when the pitch change actuator (30) is translated to drive the blades (16) through feather to reverse pitch.

REFERENCES:
patent: 2542463 (1951-02-01), Beard
patent: 2632516 (1953-03-01), Longfellow
patent: 2663373 (1953-12-01), Richmond
patent: 2855057 (1958-10-01), Van Alstyne
patent: 3175620 (1965-03-01), Newton
patent: 3212586 (1965-10-01), Barnes et al.
patent: 3645644 (1972-02-01), Schwisow
patent: 3936226 (1976-02-01), Harner et al.
patent: 4523891 (1985-06-01), Schwartz et al.
patent: 4753572 (1988-06-01), Kusiak

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