US 6,981,844 B2
Cyclic actuation system for a controllable pitch propeller and a method of providing aircraft control therewith
Robert H. Perkinson, Somers, Conn. (US); Paul A. Carvalho, Westfield, Mass. (US); and David V. Arel, Granby, Conn. (US)
Assigned to Hamilton Sundstrand, Windsor Locks, Conn. (US)
Filed on Oct. 08, 2003, as Appl. No. 10/680,922.
Prior Publication US 2005/0079053 A1, Apr. 14, 2005
Int. Cl. B64C 11/06 (2006.01)
U.S. Cl. 416—1 27 Claims
OG exemplary drawing
 
1. A propeller control system comprising:
a propeller shaft which rotates about an axis of rotation to drive a plurality of propeller blades extending therefrom;
a translating pitch change yoke portion mounted within said propeller shaft along said axis of rotation; and
an articulatable pitch change yoke portion pivotally mounted to said translating pitch change yoke portion for axial movement therewith, said translating pitch change yoke portion axially movable along said axis of rotation to collectively change a pitch of said plurality of propeller blades, said articulatable pitch change yoke portion deflectable off said axis of rotation to cyclically change the pitch of said plurality of propeller blades.