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US 5,181,674 AGranted
Wind driven craft
AssigneeSea Shelf Engineering Pty. Ltd.
InventorWilliam J. Apgar
Life of this patent
Estimating the term…
Abstract
A wind driven craft comprising a body and a pair of wings extending therefrom. The wings are pivotally connected to the body of the craft. The wings provide lift and thrust to the craft such that it is able to move under influence of the wind.
Claims17
A wind driven craft comprising:
- a body;
- a pair of wings pivotably attached to and extending from said body, each one of said pair of wings having a respective longitudinal axis;
- said wings being pivotable individually about at least one substantially longitudinal axis of said body and lockable in a selected relative position such that they are pivotable in unison, the pivotability of said wings about said at least one substantially longitudinal axis of said body enabling each wing to be pivoted individually into a selected position and locked in said selected position such that one said wing provides primarily lift and the other said wing provides primarily thrust to said wind driven craft;
- said wings being pivotable individually about a respective axis which is substantially parallel to the respective longitudinal axis of each wing;
- aerodynamic control surface means positioned rearwardly of each said wing and connected thereto by respective strut means such that each said aerodynamic control surface means is pivotably held by said respective strut means;
- said aerodynamic control surface means adapted to be pivoted to cause a respective wing to pivot about a said axis substantially parallel to the longitudinal axis of a said wing to thereby enable the lift/thrust forces on a respective wing to be controlled such that the angle of attack of a respective wing may be changed relative to air flow to thereby alter the lift/thrust force on a said wing.
3 more elements
Dependencies are inferred from the claim text.