Controllable pitch aircraft propeller

Details Controllable pitch aircraft propeller Controllable pitch aircraft propeller

1985-05-01

1987-03-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Impeller rotation speed responsive

416 46, 416154, B64C 1138

Patent

active

046487980

ABSTRACT:
A variable pitch propeller, particularly suited for use with turbine engines, includes a range of beta control in low pitch and reverse pitch positions, in which the pilot can obtain a ground angle range with substantially lower angles in relation to the flight idle position. This is accomplished by the provision of lost motion connections in the form of sliding sleeves mounted on the beta feedback rods which come into operation at a particularly defined low pitch angle, under control of the pilot, and permits the blades to move to a still lower pitch angle for ground operations, by providing for relative movement between the blade yoke and the beta feedback rods.

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patent: 3575529 (1971-04-01), Bierman
patent: 4097189 (1978-06-01), Harlamert
patent: 4202655 (1980-05-01), Maloof

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