Patent ID: 6513752
Filing Date: 2003-02-04
Classification: B64C

Abstract:
An aircraft comprising:a body having a longitudinal axis and a wing extending from opposite sides; a pair of adjustable pitch propellers, each said propeller positioned on one side of said longitudinal axis for rotation in opposite directions to each other; a rotor mounted to an upper side of said body to provide downward thrust the rotor having weighted tips; a power source that drives said rotor and said propellers; a controller for said propellers to adjust the pitch of said propellers between a forward flight mode wherein both propellers exert a forward thrust on said body and a hovering mode wherein one of said propellers exerts a rearward thrust and the other a forward thrust to counteract torque provided by said rotor when said rotor is driven by said power source and said power source comprises an engine and an overrunning clutch that is located between said engine and said rotor to enable said rotor to rotate faster than an output speed of said engine, due to the weighted tips.