초록 ▼

A wakesurfing boat for creating a wave suitable for surfing in the wake of the boat. A length to beam (L/B) ratio of 3.21 combined with a rounded hull bottom proximate the transom minimizes losses in the wake wave. Elliptical arcuate portions extending from starboard and port points on the transom t

A wakesurfing boat for creating a wave suitable for surfing in the wake of the boat. A length to beam (L/B) ratio of 3.21 combined with a rounded hull bottom proximate the transom minimizes losses in the wake wave. Elliptical arcuate portions extending from starboard and port points on the transom to selected positions on the respective starboard and port bulwarks further minimize losses in the wake wave. The hull bottom defines an M-shaped portion and a V-shaped portion. A propulsion system includes an exhaust pipe projecting from the hull bottom below the waterline, with an exhaust opening forward of the transom. A propeller has a hub and at least three blades. A blade area, defined by a sum of the area of the blades, is larger than 70% of a disc area, defined by a sum of the hub and the blades.

대표청구항 ▼

1. A wakesurfing boat comprising: a hull, the hull comprising: a bow;a stern;a transom positioned at the stern;a starboard bulwark;a port bulwark;a centerline extending between the bow and the stern midway between the starboard and port bulwarks;a bottom;a length L between the bow and the stern;a be

1. A wakesurfing boat comprising: a hull, the hull comprising: a bow;a stern;a transom positioned at the stern;a starboard bulwark;a port bulwark;a centerline extending between the bow and the stern midway between the starboard and port bulwarks;a bottom;a length L between the bow and the stern;a beam B between the starboard and port bulwarksa keel on the bottom;starboard and port inner and outer chines on the bottom, the starboard and port inner and outer chines including at least a first inner chine and an outer chine proximate the transom;a rounded portion defined on the bottom between an aft portion of the first inner chine and an aft portion of the outer chine proximate the transom, the rounded portion defining a fillet between the bottom and the starboard and port bulwarks proximate starboard and port points on the transom, the starboard point on the transom being spaced to starboard of the centerline by an amount equal to approximately 0.26(B), the port point on the transom being spaced to port of the centerline by an amount equal to approximately 0.26 (B); anda length to beam ratio L/B of between 3.1 to 3.3;a ballast system; anda propulsion system. 2. The wakesurfing boat of claim 1, wherein the L/B ratio is 3.21. 3. The wakesurfing boat of claim 1, wherein a maximum radius of the rounded portion relative to the beam B is 0.03 (B) to 0.05 (B). 4. The wakesurfing boat of claim 3, wherein the maximum radius of the rounded portion relative to the beam B is 0.04(B). 5. The wakesurfing boat of claim 1, wherein the bottom includes at least a substantial M-shaped portion and a substantial V-shaped portion. 6. The wakesurfing boat of claim 5, wherein the substantial M-shaped portion includes a peak portion defined by the keel, and starboard and port vertices defined by forward portions of the starboard and port inner chines. 7. The wakesurfing boat of claim 1, further comprising starboard and port arcuate portions extending from starboard and port points on the transom to respective starboard and port positions on the respective starboard and port bulwarks. 8. The wakesurfing boat of claim 7, wherein a length of each of the respective starboard and port positions on the respective starboard and port bulwarks measured from the respective starboard and port points on the transom is equal to 0.2(L) to 0.4(L). 9. The wakesurfing boat of claim 8, wherein the length of each of the respective starboard and port positions on the respective starboard and port bulwarks measured from the respective starboard and port points on the transom is equal to 0.3(L). 10. The wakesurfing boat of claim 5, wherein the substantial M-shaped portion on the bottom extends along the hull bottom from a first position on the bottom proximate the bow to a second position on the bottom located approximately 0.4(L) to approximately 0.5(L) aft of the bow. 11. The wakesurfing boat of claim 10, wherein the substantial V-shaped portion on the bottom extends from the stern to the second position on the bottom. 12. The wakesurfing boat of claim 1, wherein the rounded portion defined on the bottom proximate the transom defines a fillet between the bottom, the transom, and the respective starboard and port bulwarks. 13. The wakesurfing boat of claim 1, wherein the propulsion system comprises at least an engine, an exhaust pipe with an exhaust opening, and a propeller. 14. The wakesurfing boat of claim 13, wherein the exhaust pipe is attached to a wing-shaped body depending from the bottom and submerged below the transom, the exhaust opening being defined in the exhaust pipe spaced forward of the transom. 15. The wakesurfing boat of claim 13, wherein the propeller has a preselected blade area and a preselected disc area, the preselected blade area being larger than 70% of the preselected disc area. 16. The wakesurfing boat of claim 1, wherein the ballast system comprises a plurality of ballast tanks adapted to hold selected amounts of ballast water, a plurality of pipes, pumps, and valves adapted to transfer the ballast water inboard, overboard, and between the plurality of ballast tanks. 17. The wakesurfing boat of claim 1, further comprising a controller for controlling the ballast system and the propulsion system. 18. The wakesurfing boat of claim 17, wherein the controller is adapted to control the ballast system and the propulsion system to operate the wakesurfing boat in at least one of a cruising mode, a static surfing mode, and a dynamic surfing mode. 19. The wakesurfing boat of claim 1, wherein the rounded portion defined on the bottom has a maximum radius of between approximately 0.03(B) to approximately 0.04(B).