Boat hull with center V-hull and sponsons
AssigneeN.P.M. Holdings, Inc.
InventorsAlbert K. Lindstrom, John R. Kirkham
Life of this patent
Estimating the term…
Abstract
A high performance boat hull structure is provided which combines a V-hull bottom portion 12 with mid hull sponsons 31 and 33 which form longitudinal tunnels with adjacent structures. The mid hull sponsons 31 and 33 have horizontally disposed running surfaces to provide lift at high speeds. Outer sponsons 14 and 16 incorporate running surfaces 24 and 26 and together with mid hull sponsons 31 and 33 form a second air tunnel and engage and deflect side directed spray and wake downwardly providing additional lift and decreasing or eliminating spray and signature wake. Entrance of injected or inducted air into the air tunnel area decreases frictional engagement of the hull with water to improve efficiency and ride.
Claims11
A hull for a boat adapted for operation on a water surface, said hull having a bow section, a mid hull section, a keel and a stern, comprising:
- a center V-hull portion extending substantially from said bow to said stern, and including a pair of angled panels symmetrically positioned about a hull center plane, said panels defining a V-hull apex line, said angled panels each defining a V-hull dead rise angle measured from said apex line relative to a normal plane containing said apex line and perpendicular to said hull center plane;
- at least one set of first and second opposed mid hull sponsons, positioned upon said mid hull section on opposite sides of said V-hull portion, each mid hull sponson including a substantially horizontally disposed running surface and connected to said V-hull portions by reverse deadrise panels, whereby said mid-hull sponsons, and said V-hull portion, together with said water surface, define a pair of mid-hull air capturing tunnels while minimizing the wetted surface area of said mid-hull sponsons;
- first and second outer V-hull panels extending outwardly and upwardly from said mid hull sponsons;
- first and second opposed outer sponsons, positioned on opposite sides of said outer V-hull panels, each outer sponson including a lower most running surface and connected to said outer V-hull panels by second reverse deadrise panels, whereby said outer sponsons, and said V-hull panels, together with said water surface, define a pair of outer air capturing tunnels while minimizing the wetted surface area of said mid-hull sponsons;
- and
- gunwales extending upwardly from said outer sponsons.
Dependencies are inferred from the claim text.