Patent ID: 8172530

Claim:
A system for adjusting pitch of a counter-rotating propeller, the system comprising: a propeller shaft; a forward propeller driven by the propeller shaft, the forward propeller having a forward hub, forward propeller blades mounted within the forward hub; and an aft propeller connected with the forward propeller, the aft propeller having an aft hub, aft propeller blades connected to the aft hub, and a cam assembly within the aft hub connected with an end of the aft propeller blades; and an actuator within the forward hub connected with an end of the forward propeller blades, the actuator having a forward end and an aft end, wherein the aft end is connected with the cam assembly and, when the actuator moves in an axial direction, the pitch of the forward propeller blades and the pitch of the aft propeller blades are adjusted simultaneously.