Patent ID: 7758310
Filing Date: 2010-07-20
Classification: B64C

Abstract:
1. A translational thrust system for a rotary-wing aircraft comprising: a propeller system which includes a propeller hub and a plurality of propeller blades which rotate about a propeller rotational axis transverse to a main rotor system axis of rotation; a propeller pitch change piston within said propeller hub, said propeller pitch change piston mechanically linked to said plurality of propeller blades; and a mechanical-hydraulic control system in communication with said propeller system, said mechanical-hydraulic control system includes an oil transfer/position feedback tube mounted to said propeller pitch change piston, said propeller pitch change piston and said oil transfer/position feedback tube mounted for translational movement along said propeller rotational axis relative to said propeller hub to change a pitch of said plurality of propeller blades, said propeller pitch change piston mounted to said oil transfer/position feedback tube for rotation relative thereto.