Abstract

A wakesurfing boat and a hull for a wakesurfing boat. The hull includes a bow, a stern, port and starboard bulwarks, and a bottom having a preselected length extending from the bow to the stern. The bottom is configured with a substantially central ridge and port and starboard ridges extending below the respective port and starboard bulwarks to define a substantially M-shaped bottom in cross section with concave portions to port and starboard of the substantially central ridge. Port and starboard laterally rounded sponsons extend below the respective port and starboard bulwarks proximate the stern. A trim wedge projects below the stern. A first rounded stern portion extends below the stern aft of the trim wedge, and a second rounded stern portion extends from the port sponsoon to the starboard sponsoon. Ballast tanks, supported by the hull, are selectively fillable with ballast water. In a dynamic surfing mode, with ballast tanks partially or fully flooded, increased water flowing through the port and starboard concave portions, combined with increased ballast, and increased displaced water, increases water resistance to the hull, resulting in a larger wake wave. Water passing around the rounded lateral sponons, past the wedge trim, and past the first and second rounded portions of the stern is directed toward a convergent zone in the wake, resulting in an improved wake wave shape.

IPC Classes  ?

• B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls
• B63B 34/00 - Vessels specially adapted for water sports or leisure; Body-supporting devices specially adapted for water sports or leisure
• B63B 1/04 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
• B63B 11/04 - Constructional features of bunkers or ballast tanks, e.g. with elastic walls
• B63B 13/00 - Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
• B63B 43/06 - Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks

Abstract

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 disk area, defined by a sum of the hub and the blades.

IPC Classes  ?

• B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls
• B63H 1/14 - Propellers
• B63H 21/32 - Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
• B63H 1/26 - Blades
• B63B 13/00 - Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
• B63B 35/73 - Other vessels or like floating structures for pleasure or sport

Abstract

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.

IPC Classes  ?

• B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls
• B63B 1/04 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull

Abstract

A wakesurfing boat and a hull for a wakesurfing boat. The hull includes a bottom having a preselected length extending from a bow to a stern. The bottom includes a central ridge and port and starboard ridges extending below respective port and starboard bulwarks to define a substantially M-shaped bottom with concave portions to port and starboard of the central ridge. Port and starboard sponsons extend below the port and starboard bulwarks proximate the stern. A trim wedge projects below the stern. Two rounded stern portions are provided proximate the stern. In a dynamic surfing mode, with selectively-fillable ballast tanks partially or fully flooded, water flowing through the port and starboard concave portions, combined with the ballast, increases resistance to the hull, resulting in a larger wake wave. Water passing around the structural features proximate the stern is directed toward a convergent zone in the wake, resulting in an improved wake wave shape.

IPC Classes  ?

• B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls
• B63B 1/06 - Shape of fore part
• B63B 1/04 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
• B63B 43/06 - Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
• B63B 1/20 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type having more than one planing surface

Abstract

A wakesurfing boat and a hull for a wakesurfing boat. The hull includes a bottom having a preselected length extending from a bow to a stern. The bottom includes a central ridge and port and starboard ridges extending below respective port and starboard bulwarks to define a substantially M-shaped bottom with concave portions to port and starboard of the central ridge. Port and starboard sponsoons extend below the port and starboard bulwarks proximate the stern. A trim wedge projects below the stern. Two rounded stern portions are provided proximate the stern. In a dynamic surfing mode, with selectively-fillable ballast tanks partially or fully flooded, water flowing through the port and starboard concave portions, combined with the ballast, increases resistance to the hull, resulting in a larger wake wave. Water passing around the structural features proximate the stern is directed toward a convergent zone in the wake, resulting in an improved wake wave shape.

IPC Classes  ?

• B63B 1/32 - Other means for varying the inherent hydrodynamic characteristics of hulls