Patent ID: 7591229
Filing Date: 2009-09-22
Classification: B63H

Abstract:
1. A spar for a sailing vessel comprising: an elongated member having opposed first and second ends and defining a longitudinal axis of rotation and a longitudinal opening traversing said axis from said first end to said second end; said elongated member having a longitudinal slot; and said elongated member having a longitudinally extending aerodynamic surface defined by a cross-sectional shape which is substantially a convex section of an ellipse having a minor axis, said convex section being substantially an ellipse portion defined on a side bisected by the minor axis, and an opposing rear surface, said aerodynamic surface having identical starboard tack and port tack leading edges symmetric about a plane through said rotational axis and said slot wherein said plane is coincident with said minor axis and wherein said aerodynamic surface extends a greater distance than the maximum distance between said aerodynamic surface and said rear surface, and said slot being spaced from said longitudinal opening and communicating through said aerodynamic surface.