Patent ID: 6527229
Filing Date: 2003-03-04
Classification: B64C,Y02T

Abstract:
In a lift-generating member comprising:a wing-like body defining leading and trailing edges and first and second opposed surfaces which converge towards said trailing edge, said first surface being uppermost in flight; a shroud which extends forwardly and upwardly from said second surface adjacent said leading edge of the wing-like body; a spanwise extending tangential flow rotor having an axis of rotation and positioned adjacent the leading edge of the wing-like body and projecting proud of said first opposed surface, said second opposed surface being defined in part by said shroud which confines the space occupied by the tangential flow rotor and terminates at a lip to define a vortex within the rotor; the improvement wherein said lip is defined by movable flap means which is variable between a first position projecting away from the general direction of the shroud so as to intrude on the space occupied by the rotor and a second position in which it does not intrude to that same extent.