Aircraft propeller with blade pitch adjustment for feather and r

Details Aircraft propeller with blade pitch adjustment for feather and r Aircraft propeller with blade pitch adjustment for feather and r

1984-03-12

1987-03-17

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416 46, 416 49, 416154, B64C 1138

Patent

active

046504028

ABSTRACT:
A propeller hub supports a plurality of adjustable pitch propeller blades which are rotated by a hydraulic cylinder and control system between a feather position and a reverse position through low and high pitch positions. The reverse pitch position is precisely set by axially adjusting a tubular sleeve threadably connected to the hydraulic cylinder and having an inner end surface forming a stop for the piston within the cylinder. The feather position is precisely set by axially adjusting lock nuts mounted on a threaded end portion of the piston rod projecting forwardly beyond the forward end of the sleeve. The hub also encloses feedback control rods which carry externally adjustable nuts providing for pilot control of the blade pitch into the reverse position.

REFERENCES:
patent: 2694459 (1954-11-01), Biermann
patent: 2807327 (1957-09-01), Scott
patent: 2911050 (1959-11-01), Scott
patent: 2986222 (1961-05-01), Biermann
patent: 3175620 (1965-03-01), Newton
patent: 3380535 (1968-04-01), Biermann
patent: 3446289 (1969-05-01), Morris
patent: 3575529 (1971-04-01), Bierman
patent: 4097189 (1978-06-01), Harlamert
patent: 4419050 (1963-12-01), Williams
patent: 4428716 (1984-01-01), Maloof

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