Patent ID: 8590475
Filing Date: 2013-11-26
Classification: B63B,Y02T

Abstract:
1. A wakesurfing boat comprising: a hull comprising a bow, a stern, a center of gravity CG, a port bulwark, a starboard bulwark, a length L, a beam B, a first waterline defined on the bulwarks when the hull is at rest in a body of water, and a bottom extending for a preselected length from the bow to the stern, the bottom comprising: a substantially central ridge extending a first depth below the hull proximate the bow, the substantially central ridge extending along the length at progressively decreasing depths below the hull to a substantially planar bottom portion midway between the bow and the stern; port and starboard ridges extending second depths below the hull proximate the respective port and starboard bulwarks, defining with the substantially central ridge a generally M-shaped cross section, with port and starboard concave portions between the substantially central ridge and the respective port and starboard ridges, the port and starboard ridges extending at progressively decreasing depths below the hull to the substantially planar bottom portion; port and starboard lateral sponson extending beneath the port and starboard bulwarks proximate the stern; and a trim wedge extending below the stern, and extending forward toward the substantially planar portion; a ballast system supported by the hull comprising a plurality of ballast tanks and a ballast watering system, the ballast tanks configured and positioned in the hull to selectively receive ballast water to trim the hull, while moving through the water, in one of at least two operating modes, the at least two operating modes including: a cruising mode, wherein the ballast tanks are substantially empty, the hull has a first trim angle and a second waterline, the hull displacing a first amount of water, and a first amount of water entering openings at the bow of the port and starboard concave portions of the generally M-shaped bottom and traversing the length in the port and starboard concave portions, combining to subject the hull to a first amount of water resistance; and a dynamic surfing mode, wherein the ballast tanks are at least partially filled or filled with ballast water, the hull has a second trim angle and a third waterline, higher on the bulwarks than the second waterline, the hull displacing a second amount of displaced water greater than the first amount of displaced water, and a second amount of water, greater than the first amount of water, entering the openings at the bow of the port and starboard concave portions of the generally M-shaped bottom and traversing the length in the port and starboard concave portions, combining to subject the hull to a second amount of water resistance greater than the first amount of water resistance; a deck; and counter-rotating propellers.