초록 ▼

The disclosed watercraft hull has a flat pad keel whose width tapers towards the bow and its width at the transom is 15% to 25% of the hull's width at its chines. The hull is symmetric about its centerline, has a fine entry bow, a transom, and a pair of hard chines. Between the pad keel and the chin

The disclosed watercraft hull has a flat pad keel whose width tapers towards the bow and its width at the transom is 15% to 25% of the hull's width at its chines. The hull is symmetric about its centerline, has a fine entry bow, a transom, and a pair of hard chines. Between the pad keel and the chines the hull has at least one pair of generally flat panels referred to herein as longitudinal steps having approximately 0 degrees of deadrize forming planing surfaces symmetrically located about the hull centerline. The hull also includes at least one pair of ultra high deadrize panels, outboard of and adjacent to the pad keel, located symmetrically about the hull centerline, and extending therefrom to the flat planing panels above them. The ultra high deadrize panels have a minimum average deadrize of approximately 50 degrees measured along their length. Additional flat planing surface structures having approximately 0° deadrize may be installed longitudinally on the hull between the pad keel and the hard chine such that the vertical offset between any two planing surfaces along the hull's stagnation line does not exceed approximately six inches. High deadrize panels or fillet panels with deadrize angles of between about 0.20 and 35 degrees may be included in the hull outboard of and adjacent to the ultra high deadrize panels and located symmetrically about the hull centerline. The fillet panels are tapered into wedge shapes at their forward ends to blend into the adjacent ultra high deadrize and flat planing panels.

대표청구항 ▼

1. A watercraft including a hull comprising: a bow;a transom;a pair of chines symmetrically arranged on the hull and defining a width of the hull;a flat pad keel having a width at the transom that is 15% to 25% of the hull width at outer hull chines as measured at the transom;a pair of hull panels e

1. A watercraft including a hull comprising: a bow;a transom;a pair of chines symmetrically arranged on the hull and defining a width of the hull;a flat pad keel having a width at the transom that is 15% to 25% of the hull width at outer hull chines as measured at the transom;a pair of hull panels each having a deadrise angle of 50 degrees or more extending outwardly upwardly, and symmetrically and disposed about a hull centerline and connecting the flat pad keel to a first pair of longitudinal steps forming planing surfaces; andone or more additional pairs of hull panels forming longitudinal steps symmetrically disposed about the hull centerline and disposed between additional pairs of planing surfaces or strakes, which one or more additional pairs of hull panels connect the first and lowermost pair of planing surfaces or strakes to one or more additional pairs of planing surfaces or strakes, and, of the one or more additional pairs of hull panels, a most outboard pair of hull panels connect (i) to the hull chines, (ii) to a most outboard pair of planing surfaces, (iii) to entrapment tunnels, or (iv) to amas, symmetrically disposed about the hull centerline;wherein the planing surfaces have a combined width of 14 to 20% of the hull at width outer hull chines as measured at the transom, and all hull panels have a deadrise of 50 degrees or more; andwherein at least one pair of the longitudinal steps curve upward in the bow to conform to curvature of the bow. 2. A watercraft as defined in claim 1, wherein said pair of chines include planing surfaces. 3. A watercraft as defined in claim 2, including at least one pair of strakes symmetrically disposed about the hull centerline. 4. A watercraft as defined in claim 3, wherein the strakes include flat planing surfaces that project outward and wherein the vertical offset between any two planing surfaces of the hull does not exceed six inches. 5. A watercraft as defined in claim 1, wherein said at least one pair of planing surfaces is spaced no less than 4 inches above the bottom of the flat pad keel. 6. A watercraft as defined in claim 1, including at least a second pair of hull panels symmetrically disposed about the hull centerline and having bottom edges respectively connected to said at least one pair of symmetric longitudinal planing surfaces and extending upwardly and outwardly therefrom. 7. A watercraft as defined in claim 1, further comprising strakes wherein the strakes include flat planing surfaces that project outward; and wherein vertical spacing between said at least one pair of symmetric longitudinal steps exceeds 6 inches. 8. The watercraft as defined in claim 1, further comprising fillet panels having deadrise angles of between 20 and 35 degrees located in an aft end of the hull starting at the transom and extending forward therefrom, said fillet panels being symmetrically disposed about the hull centerline and secured to a hull panel adjacent to the flat pad keel and extending laterally outwardly and upwardly to an inner edge of a longitudinal planing step immediately above the hull panel. 9. A watercraft as defined in claim 8, wherein said fillet panels taper symmetrically forward and terminate at an inboard edge of an intersection of the longitudinal planing step and a hull panel. 10. A watercraft as defined in claim 9, wherein said intersection is located a distance of no more than 60% of the hull waterline measured from the transom. 11. A watercraft as defined in claim 9, wherein the intersection of said hull panels and fillet panels is forward of midship of the hull. 12. A watercraft as defined in claim 8, wherein additional fillet panels symmetrically disposed on opposite sides of the hull centerline extend between hull panels and longitudinal steps above the hull panels. 13. A watercraft as defined in claim 8, further comprising a pair of amas, outer side hulls, or sponsons symmetrically disposed about the hull centerline, which amas define an outboard surface of entrapment tunnels. 14. A watercraft as defined in claim 8, wherein said watercraft includes at least one pair of laterally spaced and connected deep V hulls. 15. A watercraft as defined in claim 8, wherein said watercraft is a multihull vessel comprising two or more half hull structures. 16. A watercraft as defined in claim 8, wherein said hull has at least one transverse step formed therein. 17. A watercraft as defined in claim 1, further comprising a pair of amas, outer side hulls or sponsons symmetrically disposed about the hull centerline, which amas define an outboard surface of entrapment tunnels. 18. A watercraft as defined in claim 1, wherein said watercraft includes at least one pair of laterally spaced and connected deep V hulls. 19. A watercraft as defined in claim 1, wherein said watercraft is a multihull vessel comprising two or more half hull structures. 20. A watercraft as defined in claim 1, wherein said hull has at least one transverse step formed therein. 21. A watercraft as defined in claim 1, wherein said watercraft includes at least one pair of laterally spaced connected hulls. 22. A watercraft comprising at least one hull comprising: a hull centerline, a bow, a transom, a pair of chines symmetrically arranged on the hull and defining a width of the hull;a flat pad keel having a width which is 15% to 25% of the width of the hull at outer hull chines as measured at the transom;at least one pair of lower hull panels, outboard of and adjacent to said flat pad keel, and located symmetrically about the hull centerline, each panel having a deadrise of 50 degrees or more degrees a bottom edge connected to the flat pad keel, and a top edge;at least one pair of symmetric longitudinal hull steps respectively adjacent to and above said hull panels and located symmetrically about the hull centerline, the lowermost of said at least one pair of symmetric longitudinal hull steps having respectively inner edges connected to the top edges of the hull panels and extending outwardly, wherein the flat planing surfaces of the lowermost symmetric longitudinal hull steps have a combined width of 14 to 20% of the width of the hull at the hull chines as measured at the transom; andfurther comprising, a pair of amas (outer side hulls or sponsons) symmetrically disposed about the hull centerline, each of which amas defines an entrapment tunnel. 23. A watercraft as defined in claim 22, wherein said hull has a forebode and a curved bow and said flat pad keel curves upwards in the forebody of the hull, following the curvature of the bow. 24. A watercraft as defined in claim 23, wherein said flat pad keel has a forward section which tapers to an apex located where the at least one pair of lower hull panels intersect at the bow to form a deadrise angle of 50 to 60 degrees. 25. A watercraft as defined in claim 24, wherein said apex of said flat pad keel is between a forefoot of the hull and a point of intersection of a design waterline with the bow. 26. A watercraft as defined in claim 24, wherein said deadrise panels extend from the transom to the apex of said flat pad keel. 27. A watercraft as defined in claim 22, further comprising at least one additional pair of higher hull panels having a deadrise of 50 degrees or more degrees outboard and above the lowermost hull panels, which higher hull panels are symmetrically disposed on opposite sides of the hull centerline outboard of the lowermost hull panels, the outboard edges of which higher hulls panels join the inner edges of longitudinal hull steps symmetrically disposed on opposite sides of the hull centerline. 28. A watercraft as defined in claim 27, wherein the longitudinal hull steps joined to the higher hull panels include planing surfaces that extend forward from the transom and converge forward of midship toward the top of the hull at an angle greater than the angle at which the hull centerline converges forward of midship toward the top of the hull. 29. A watercraft as defined in claim 22, wherein the amas include a downward projection terminating in an apex. 30. A watercraft as defined in claim 22, wherein said hull has at least one transverse step formed therein.