Ships – Sail or control means therefor – Specific sail structure or arrangement
Patent
1992-06-03
1993-10-05
Oberleitner, Robert J.
Ships
Sail or control means therefor
Specific sail structure or arrangement
114102, B63H 908
Patent
active
052495426
ABSTRACT:
A self-cambering airfoil, comprising a mast to which a camber inducer member is secured for rotational movement about the axis of the mast. The camber inducer member extends rearwardly from the mast to a trailing portion having a batten realignment cavity therein. The realignment cavity receives a flexible batten element therein and accommodates recambering of the flexible batten element when the camber inducer member repositions from a first camber position thereof to a second camber position thereof. An elongate flexible batten element is positioned at a leading edge thereof in the batten realignment cavity of the camber inducer member and extends rearwardly therefrom to a trailing edge. A skin covering comprises two main panels each extending rearwardly from the mast to a trailing edge and joined to one another at their respective trailing edges to form a trailing portion of the skin covering. The main panels are of a size and shape defining an enclosure containing the batten element, with the trailing edge of the batten element being in interior abutting contact with the skin covering at the trailing portion thereof and in a state of compression within the enclosure defined by the skin covering such that in the first camber position of the camber inducer member, the batten element interiorly abuts, distends and imparts a camber profile to a first one of the two main panels, and in the second camber position of the camber inducermember, the batten element interiorly abuts, distends and imparts a camber profile to a second one of the two main panels. The self-cambering airfoil is usefully employed as a wingsail structural assembly of a wind-propelled craft such as a sailboat, sailplane, or iceboat.
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Bartz Clifford T.
Hultquist Steven J.
Oberleitner Robert J.
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