Patent ID: 7487736
Filing Date: 2009-02-10
Classification: B63B

Abstract:
1. A hybrid hull with a vertical plane of two-fold symmetry, a bow end, a midsection and a stern end, said hybrid hull comprising: a first outer elongated hull and a second outer elongated hull; wherein said first and second outer hulls respectively define first and second keel fins, wherein said first and second keel fins respectively define first and second bisecting longitudinal planes, and wherein said first and second keel fins are each angled inwards such that their respective bisecting longitudinal planes are each angled inwards towards said vertical plane of two-fold symmetry at an angle of about 20° to about 25° with respect to the horizontal plane, wherein said first and second keel fins respectively define first and second leading edges, wherein said first leading edge of said first keel fin curves progressively inwards towards the vertical plane of two-fold symmetry between said bow end and said midsection, said first leading edge of said first keel fin substantially straightens to define first keel-fin edge, wherein the second leading edge of said second keel fin curves progressively inwards towards the vertical plane of two-fold symmetry between said bow end and said midsection, said second leading edge of said second keel fin substantially straightens to define second keel-fin edge, wherein said first and second keel-fin edges define a keel-fin gap and wherein said keel-fin gap extends between said midsection and said stem, wherein said first keel fin has an underside surface capable of planing on a water surface, said underside surface of said first keel fin is located between said midsection and said stern, and wherein said second keel fin has an underside surface capable of planing on a water surface, said underside surface of said second keel fin is located between said midsection and said stern.