Multifunction hydrodynamic and buoyant hull extension for planing water craft
OwnerJohn G. Strickerinventor
Life of this patent
Estimating the term…
Abstract
A hull extension is attached at an appropriate distance above the hull bottom surface to the stern of a planing water craft so as to be at least partially submerged at subplaning speeds and totally unsubmerged at planing speeds, effectively increasing hull length at subplaning speeds while not affecting hull length at planing speeds. A "step" effect is thus featured whereby the hull extension is not in contact with the water once planing commences. Hydrodynamic and buoyant efficiency is increased by the hull extension at subplaning speeds and unaffected thereby at planing speeds. The hull extension also offers practical utility in terms of providing additional protection, deck space and mounting area.
Claims14
For a planing water craft wherein at least a portion of the hull of said craft hydroplanes when said craft is moving at planing speeds relative to water, a hull extension comprising:
- at least one structural adjunct which is attached generally contiguously to the stern of said hull;
- at least one said adjunct being hollow, thereby forming a fluid-tight chamber;
- each said adjunct extending generally rearwardly from the stern of said hull;
- each said adjunct having an upper surface, a lower surface and at least one side surface extending therebetween and wherein said lower surface of each said adjunct is located a tangible distance above the bottom surface of said hull;
- whereby each said adjunct is located at least partially below the surface of said water when said craft is moving at subplaning speeds relative to said water, thereby effectively increasing the length of said hull at subplaning speeds, and each said adjunct is located entirely above said surface of said water when said craft is moving at planing speeds relative to said water;
- whereby said hull extension increases the hydrodynamic and buoyant efficiency of said craft when said craft is moving at subplaning speeds and said hull extension does not affect the hydrodynamic and buoyant efficiency of said craft when said craft is moving at planing speeds.
Dependencies are inferred from the claim text.