Automatic centrifugal force variable pitch propeller

An automatic centrifugal force variable pitch propeller assembly comprising:

• a housing mounted to a rotatable shaft;
• a plurality of propeller blades, each having a blade end and a cylindrical shaft end, the shaft end of each of the propeller blades being mounted within the housing such that the propeller blades extend radially from the housing, each of the propeller blades being mounted to permit limited radial travel in its entirety along a horizontal axis of each of the propeller blades and simultaneous limited rotation about said longitudinal axis, the limited radial travel of each of the propeller blades in its entirety being caused by a centrifugal force developed by rotation of the propeller assembly, the limited radial travel of each of the propeller blades in its entirety extending between an inward position corresponding to rotation of the propeller assembly at an idle speed and an outward position corresponding to rotation of the propeller assembly at a maximum speed;
• pitch change means mounted within the housing and coupled to the shaft end of each of the propeller blades, the pitch change means being solely responsive to radial travel of each of the propeller blades in its entirety, caused by said centrifugal force developed by rotation of the propeller assembly, for causing an identical predetermined incremental rotation of each of the propeller blades about said longitudinal axis, said identical predetermined incremental rotation of each of the propeller blades being a nonlinear function of the radial travel of each of the propeller blades in its entirety;
• and
• crank and push rod means for providing a rigid mechanical interconnection between the shaft ends of each of the propeller blades to in sure that the propeller blades travel radially in their entirety in concert with each other to thereby provide fail safe operation of the propeller assembly.