Patent ID: 6655631
Filing Date: 2003-12-02
Classification: B64C,B64D,Y02T

Abstract:
A VTOL tiltmotor aircraft, comprising a fuselage having a forward cockpit set directly in front of a shoulder mounted wing, a conventional rearward tail with fin and rudder and having a high set tailplane and elevators, large flaps mounted on said wing usable as dive brakes and having means to effect their deployment in synchronization with motor tilt, two nacelles mounted on said wing, one to port and the other to starboard each with a forward motor tiltable up beyond the vertical through an arc greater than ninety degrees and an aft motor tiltable downward beyond the vertical through an arc greater than ninety degrees such as to permit a nose down flight attitude with propeller discs horizontal, an electric motor fitted to each engine to provide emergency power with means to unfeather said propellers and disengage them via a clutch mechanism from any failed engine as emergency power is applied, and means under autopilot or manual control to maintain the center of lift, said propellers being variable pitch fully feathering and thrust reversing and having means for their control and means to stop with blades vertical when feathered in horizontal or translational flight.