Hull foils with hydrodynamic righting forces
OwnerPhilip J. Danahyinventor
Life of this patent
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Abstract
A boat is provided having front and rear ends, a bottom and upwardly projecting sides extending upwardly to an elevation spaced above the static water line of the boat. A depending central strut (fixed or upwardly retractable) projects downwardly from the bottom and a pair of elongated downwardly convergent opposite side flexible foils including leading and trailing longitudinal edges facing in front and rear directions, respectively, of the boat are provided and have their lower ends anchored to the lower end portion of the strut. The upper end portions of the foils are anchored relative to upper portions of the corresponding sides of the boat above the static water line thereof outwardly of the boat sides and the foils are free of support from the boat intermediate the upper and lower ends of the foils.
Claims15
In combination with a boat having front and rear ends, a bottom and upwardly projecting sides extending upwardly to an elevation spaced above the static water line of said boat, a depending central strut projecting downwardly from said bottom, a pair of elongated, longitudinally straight and downwardly convergent opposite side flexible foils including leading and trailing longitudinal edges facing in front and rear directions, respectively, of said boat, first anchor means anchoring the lower ends of said foils to the lower end portion of said strut, and second anchor means anchoring the upper end portions of said foils to upper portions of the corresponding sides of said boat above said static waterline, said foils extending lengthwise along generally straight paths and being free of support from said boat and each other intermediate said first and second anchor means and thereby being free to twist and bow, slightly, between said first and second anchor means.
Dependencies are inferred from the claim text.