Patent ID: 9114863
Filing Date: 2015-08-25
Classification: B63B,B63H

Abstract:
1. A device for powering a craft by aerodynamic forces, said craft having a mast member having a base end, a top end and an elongated body, said base end constructed and arranged for attachment to a base of said craft, said top end for projecting away from said craft, said device comprising: a fairing member constructed and arranged for rotational attachment to said mast member and substantially encasing the elongated body, said fairing member having a base end and a top end corresponding to said mast member, said fairing member having a first fairing surface and a second fairing surface defining a symmetrical aerofoil cross-sectional shape with a projecting rounded forward face, an extending tapered back with a fairing back edge, one or more flap elements, each flap element having a first flap surface and a second flap surface, said first flap surface associated with said first fairing surface and said second flap surface associated with said second fairing surface, each flap surface having a forward edge towards said mast and a back edge distal to said mast and mechanically linked such that at least one of said first flap surface and second flap surface is projecting out from said first fairing surface and second fairing surface, each flap element capable of assuming at least a first position and a second position, in said first position one of said first flap surface and second flap surface is aligned with said associated first fairing surface and said second fairing surface to define a aerofoil contour providing aerodynamic lift and one of said first flap surface and one of said first flap surface and second flap surface is set at an angle of 60 to 120 degrees with respect to the associated fairing surface, and in said second position said first flap surface projecting away from said first fairing surface and said second flap surface projecting away from said second fairing surface such that no aerodynamic lift is made; said one or more flap elements moveable to assume said first position to increase aerodynamic lift or moveable to said second position to provide no aerodynamic lift.