Watercraft planing hull with inverted chine

Abstract

Provided is watercraft hull system, including a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a substantially V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and a substantially M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.

What is claimed is: 
     
         1 . A watercraft hull system, comprising:
 a hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end;   a V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis; and   an M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion.   
     
     
         2 . The watercraft hull system of  claim 1 , wherein the hull includes a first starboard chine, a second starboard chine, a third starboard chine, a first port chine that extends from the first starboard chine at a centerline that runs along the longitudinal axis, a second port chine that extends from the second starboard chine at the centerline, and a third port chine that extends from the third starboard chine at the centerline. 
     
     
         3 . The watercraft hull system of  claim 2 , wherein the centerline includes a keel having a stem and a forefoot. 
     
     
         4 . The watercraft hull system of  claim 3 , wherein the first port chine and the first starboard chine meet at a first point on the stem, wherein the second port chine and the second starboard chine meet at a second point on the stem above the first point, and the third port chine and the third starboard chine meet at a third point on the stem above the second point and is nearest a sheerline of the hull. 
     
     
         5 . The watercraft hull system of  claim 4 , wherein the second point and the third point are the same point. 
     
     
         6 . The watercraft hull system of  claim 2 , wherein the first starboard chine and the centerline define a first starboard side hull area, the first port chine and the centerline define a first port side hull area, the second starboard chine and the first starboard chine define a second starboard side hull area that extends starboard from the first starboard side hull area, the second port chine and the first port chine define a second port side hull area that extends port from the first port side hull area, the third starboard chine and the second starboard chine define a third starboard side hull area that extends starboard from the second starboard side hull area, and the third port chine and the second port chine define a third port side hull area that extends port from the second port side hull area. 
     
     
         7 . The watercraft hull system of  claim 6 , wherein the second starboard side hull area is between the first starboard side hull area and the third starboard side hull area, and the second port side hull area is between the first port side hull area and the third port side hull area. 
     
     
         8 . The watercraft hull system of  claim 6 , wherein the first starboard side hull area and the first port side hull area have positive deadrise from the fore end to the aft end. 
     
     
         9 . The watercraft hull system of  claim 6 , wherein the third starboard side hull area and the third port side hull area have positive deadrise from the fore end to the aft end. 
     
     
         10 . The watercraft hull system of  claim 6 , wherein the second starboard side hull area and the second port side hull area have positive deadrise in the V-shaped portion that gradually decreases in angle from the fore end to a zero degree angle at a furthest aft end of the V-shaped portion and have a negative deadrise in the M-shaped portion that gradually becomes more negative from the zero degree angle where the M-shaped portion is adjacent the V-shaped portion to a final negative angle. 
     
     
         11 . The watercraft hull system of  claim 10 , wherein the final negative angle is an angle between −10 degrees and −60 degrees. 
     
     
         12 . The watercraft hull system of  claim 10 , wherein the final negative angle is realized at a point longitudinally in the M-shaped portion before the aft end and the second starboard side hull area and the second port side hull area continue from the point to the aft end substantially at the final negative angle. 
     
     
         13 . The watercraft hull system of  claim 10 , wherein the second starboard side hull area and the third starboard side hull area in the M-shaped portion form a starboard sponson, and the second port side hull area and the third port side hull area in the M-shaped portion form a port sponson. 
     
     
         14 . The watercraft hull system of  claim 13 , wherein a transom extends substantially vertically from the first starboard side hull area and the first port side hull area at the aft end. 
     
     
         15 . The watercraft hull system of  claim 14 , wherein the starboard sponson and the port sponson end further aft than the transom. 
     
     
         16 . The watercraft hull system of  claim 10 , wherein the second starboard side hull area and the third starboard side hull area in the V-shaped portion and the M-shaped portion form a starboard sponson, and the second port side hull area and the third port side hull area in the V-shaped portion and the M-shaped portion form a port sponson. 
     
     
         17 . The watercraft hull system of  claim 6 , wherein the second starboard side hull area has a latitudinal width of at least 8% of a beam of the hull in the M-shaped portion and the second port side hull area has a latitudinal width of at least 8% of the beam of the hull in the M-shaped portion. 
     
     
         18 . The watercraft hull system of  claim 17 , wherein the first starboard side hull area has a latitudinal width of 20%-30% of the beam of the hull in the M-shaped portion and the first port side hull area has a latitudinal width of at least 20%-30% of the beam of the hull in the M-shaped portion. 
     
     
         19 . The watercraft hull system of  claim 1 , wherein the V-shaped portion gradually transitions to the M-shaped portion by inverting a chine. 
     
     
         20 . A boat, comprising:
 a hull including a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end,   a V-shaped portion extending from the fore end toward the aft end along a portion of the longitudinal axis, and   a M-shaped portion extending from the V-shaped portion toward the aft end, wherein the V-shaped portion gradually transitions to the M-shaped portion; and   a boat motor coupled to the hull.