Boat Hull

Abstract

A shallow draft boat having a boat hull that allows for stability, maneuverability, and speed while needing only inches of draft. The hull generally includes a ski, a bottom shell, a left and right chine and a bow wrapper.

1 . A boat hull having a beam and an overall length and wherein said hull comprises:
 a ski having an approximately triangular shape and wherein a first side of said ski has a length of approximately 7-27% of the beam and wherein a second and third side each have a ski length of less than 75% of said overall length and greater than 25% of said overall length;   a bottom shell extending outwardly from said ski and wherein said bottom shell has a dead rise of at least 5 degrees and a dead rise of no greater than 25 degrees; and   a bow wrapper.   
     
     
         2 . The hull of  claim 1  further including a transom extending from said ski and said bottom shell and opposing said bow wrapper relative to said bottom shell and wherein said ski does not extend from said transom to said bow wrapper and wherein said first side of said ski is proximate to said transom. 
     
     
         3 . The hull of  claim 2  wherein said first side of said ski has a length of approximately 12-24% of the beam. 
     
     
         4 . The hull of  claim 2  wherein said ski has first width of 5-15% the relative beam, measured at a length of approximately 25% of the overall length from the transom. 
     
     
         5 . The hull of  claim 4  wherein said first width is 7-12% of the relative beam. 
     
     
         6 . The hull of  claim 1  wherein said ski has a second width of 1-6% of the relative beam measured at a length of approximately 50% of the overall length from a transom. 
     
     
         7 . The hull of  claim 1  wherein said ski length is less than 70% of said overall length and greater than 45% of said overall length. 
     
     
         8 . The hull of  claim 7  wherein said ski length is 54-66% of the overall length. 
     
     
         9 . The hull of  claim 1  wherein a transom dead rise proximate to said transom is 4-12 degrees. 
     
     
         10 . The hull of  claim 1  wherein a first dead rise measured at a length of approximately 25% of the overall length from a transom is 5-13 degrees. 
     
     
         11 . The hull of  claim 10  wherein said first dead rise is 6-10 degrees. 
     
     
         12 . The hull of  claim 1  wherein a second dead rise measured at a length of approximately 50% of the overall length from a transom is 6-15 degrees. 
     
     
         13 . The hull of  claim 12  wherein said second dead rise is 7-12 degrees. 
     
     
         14 . The hull of  claim 1  wherein a third dead rise measured at a length of approximately 75% of the overall length from a transom is 10-25 degrees. 
     
     
         15 . The hull of  claim 14  wherein said third dead rise is 15-24 degrees. 
     
     
         16 . The hull of  claim 1  wherein said ski has a transom width proximate to a transom and a first width measured at a length of approximately 25% of the overall length from the transom and a second width measured at a length of approximately 50% of the overall length from said transom and wherein said first width is approximately 45-69% of said transom width and said second width is approximately 10-30% of said transom width. 
     
     
         17 . The hull of  claim 1  wherein said ski has a transom width proximate to a transom and a first width measured at a length of approximately 25% of the overall length from the transom and a second width measured at a length of approximately 50% of the overall length from said transom and wherein said first width is approximately 52-64% of said transom width and said second width is approximately 15-20% of said transom width. 
     
     
         18 . The hull of  claim 1  including a transom dead rise proximate to a transom, a first dead rise measured at a length of approximately 25% of the overall length from said transom, a second dead rise measured at a length of approximately 50% of the overall length from said transom a third dead rise measured at a length of approximately 75% of the overall length from said transom wherein said first dead rise is within three degrees of said transom dead rise and said second dead rise is within six degrees of said transom dead rise and wherein said second dead rise is greater than said first dead rise and wherein said third dead rise is greater than said second dead rise and within 20 degrees of said second dead rise. 
     
     
         19 . The hull of  claim 18  wherein said first dead rise is 0-1.5 degrees greater than said transom dead rise, said second dead rise is 0.5-4 degrees greater than said transom dead rise and wherein said second dead rise is greater than said first dead rise and wherein said third dead rise is 8-20 degrees greater than said transom dead rise. 
     
     
         20 . The hull of  claim 1  including a transom dead rise proximate to a transom, a first dead rise measured at a length of approximately 25% of the overall length from said transom, a second dead rise measured at a length of approximately 50% of the overall length from said transom a third dead rise measured at a length of approximately 75% of the overall length from said transom wherein said first dead rise is greater than said transom dead rise but less than 105% of said transom dead rise, said second dead rise is greater than said first dead rise but less than 125% of said transom dead rise and said third dead rise is greater than said second dead rise but less than 305% of said transom dead rise. 
     
     
         21 . The hull of  claim 1  further including a chine proximate to said bottom shell and approximately extending from said bow wrapper to a transom and wherein said chine reduces in width as it extends from said transom to said bow wrapper, and wherein the reduction in width is less than 25% of a transom chine width proximate to said transom. 
     
     
         22 . The hull of  claim 21  wherein said chine includes a first chine width measured at a length of approximately 25% of the overall length from said transom, a second chine width measured at a length of approximately 50% of the overall length from said transom a third chine width measured at a length of approximately 75% of the overall length from said transom and wherein said transom chine width is 2-10% of the beam and wherein said third transom varies in width less than 2% of the beam from the transom chine width. 
     
     
         23 . The hull of  claim 30  wherein said first chine width is 2-9.5% of the beam, said second chine width is 2-9% of the beam, and said third chine width is 1.5-9% of the beam. 
     
     
         24 . The hull of  claim 22  wherein said first chine width is less than said transom chine width but greater than 85% of said transom chine width, said second chine width is less than said first chine width but greater than 70% of said transom chine width, and said third chine width is less than said second chine width but greater than 65% of said transom chine width. 
     
     
         25 . The hull of  claim 1  having a plane-off angle of less than 10 degrees. 
     
     
         26 . The hull of  claim 25  wherein said plane-off angle is less than 6.5 degrees. 
     
     
         27 . The hull of  claim 1  wherein the hump speed is less than 15 mph. 
     
     
         28 . The hull of  claim 1  further including at least one skeg coupled to said bottom shell proximate said transom. 
     
     
         29 . The hull of  claim 28  wherein said skeg is further coupled proximate to at least one chine. 
     
     
         30 . The hull of  claim 21  wherein said chine separates water away from the hull rather than letting water attach to the hull. 
     
     
         31 . The hull of  claim 1  wherein said bow wrapper has a spoon shape. 
     
     
         32 . The hull of  claim 31  wherein said bow wrapper is configured to increase buoyancy of the hull the further the hull pivots perpendicular to the overall length until at least said transom and a portion of said ski, said bottom shell and a right chine and a left chine are free of the water proximate to said transom. 
     
     
         33 . The hull of  claim 1  wherein said bow wrapper includes an expanding curvature as the distance increases from the transom and as the distance increases in height from a plane formed by the ski. 
     
     
         34 . The hull of  claim 1  wherein said bottom shell increases from approximately a 7-9 degree dead rise proximate the transom to a 21-27 degree dead rise proximate to the bow wrapper. 
     
     
         35 . The hull of  claim 34  wherein said bow wrapper changes from an angular profile proximate to said shell to a rounded expanding curvature as the distance increased from the shell. 
     
     
         36 . A boat hull extending between a transom and a bow and having a beam and an overall length, the boat hull comprising:
 a ski having an approximately triangular shape to define a first side disposed along the transom and second and third sides extending from said first side towards the bow along a ski plane;   a bottom shell extending outwardly from said second and third sides to a left chine and a right chine and wherein said bottom shell has a transom dead rise between  6  to  10  degrees proximate to the transom and relative to said ski plane to minimize vertical displacement of said chine relative to said ski plane; and   at least one skeg coupled to said bottom shell and disposed proximate the transom and inwardly from said left chine and said right chine to prevent roll-out during high speed turns.   
     
     
         37 . The boat hull of  claim 36  wherein said bottom shell having a first dead rise between 6 to 10 degrees measured between the transom and a length of approximately 25% of the overall length from the transom to minimize vertical displacement of said chines relative to said ski plane within 25% of the overall length from the transom. 
     
     
         38 . The boat hull of  claim 37  wherein said bottom shell has a second dead rise between 9 and 21 degrees measured between a length of approximately 50% of the overall length to a length of approximately 75% of the overall length from the transom. 
     
     
         39 . A boat hull extending between a transom and a bow and having a beam and an overall length, the boat hull comprising:
 a ski having an approximately triangular shape to define a first side disposed along the transom and second and third sides extending from said first side towards the bow along a ski plane;   said first side having a length of approximately 15-19% of the beam and said second and third sides having a length of approximately 58-64% of the overall length;   a bottom shell extending outwardly from said second and third sides to a left chine and a right chine and wherein said bottom shell has a transom dead rise between 7-8 degrees relative to said ski plane and proximate the transom to minimize vertical displacement of said left and right chines relative to said ski plane, a first dead rise between 7-8.5 degrees relative to said ski plane and measured at a length of approximately 25% of the overall length from the transom, a second dead rise between 8-10.5 degrees relative to said ski plane and measured at a length of approximately 50% of the overall length from the transom, a third dead rise between 19-23 degrees relative to said ski plane and measured at a length of approximately 75% of the overall length from the transom;   at least one skeg coupled to said bottom shell and disposed proximate the transom and between said left chine and said right chine and wherein said left and right chines each have a transom chine width proximate to the transom being 2-10% of the beam, a first chine width measured at a length of approximately 25% of the overall length from the transom and being 2.5-7% of the beam, a second chine width measured at a length of approximately 50% of the overall length from the transom and being 2.4-6.4% of the beam, and a third chine width measured at a length of approximately 75% of the overall length from the transom and being 2.2-5.8% of the beam; and   a bow wrapper extending forward proximate the bow and having an expanding curvature as the distance from said ski plane increases.