Boat hull structure

Abstract

A boat hull comprises a hull body having two lateral flanks linked by a bottom surface, and at least two propulsion compartments provided in two bulges protruding below the bottom surface of the hull body. Each propulsion compartment lodges a propulsion engine located below the bottom surface of the hull body. The propulsion engines are located at the deepest position in the hull and below the water plane.

1 . (canceled) 
   
   
       2 . (canceled) 
   
   
       3 . (canceled) 
   
   
       4 . (canceled) 
   
   
       5 . (canceled) 
   
   
       6 . The hull structure according to  claim 19 , wherein the tapered tail end of each bulge is offset a distance from the bottom surface of the hull. 
   
   
       7 . The hull structure according to  claim 6 , wherein each propulsion engine is connected to a propeller shaft extending out of the tail end of each bulge. 
   
   
       8 . The hull structure according to  claim 7 , wherein each propeller shaft extends substantially parallel with a water plane. 
   
   
       9 . The hull structure according to  claim 7 , wherein each propeller shaft extends rearward beyond a sternpost of the hull body. 
   
   
       10 . (canceled) 
   
   
       11 . The hull structure according to  claim 19 , wherein the bulges have a generally oval shape in a transversal section. 
   
   
       12 . The hull structure according to  claim 19 , wherein the bulges occupy a rear half of the length of the hull body. 
   
   
       13 . The hull structure according to  claim 19 , wherein the bulges are formed with the hull in a single body. 
   
   
       14 . The hull structure according to  claim 19 , wherein the keel placed between the two propulsion compartments and protruded from the bottom surface of the vessel is of a height greater than that of any one said two bulges. 
   
   
       15 . The hull structure according to  claim 14 , wherein the keel extends substantially from a sternpost of the hull toward a bow of the hull. 
   
   
       16 . (canceled) 
   
   
       17 . The hull structure according to  claim 19 , wherein the propulsion compartments further includes a fuel tank. 
   
   
       18 . The hull structure according to  claim 7 , wherein the bottom surface of the vessel further includes at least one shaft bracket to support the propeller shaft. 
   
   
       19 . A hull structure for a water vessel comprising:
 a hull body including two lateral flanks linked by a bottom surface;   a keel extending along the centerline of the bottom surface and protruding therefrom below a water plane;   at least two propulsion compartments provided in bulges protruding below the bottom surface of the hull body and arranged between said two lateral flanks of the hull body and symmetrically with respect to the centerline of the bottom surface separated by the keel, each of said bulges having a streamlined profile and each bulge extending into a tapered tail end;   wherein the bottom surface of the hull body includes concave portions extending lengthwise along the keel for receiving said at least two propulsion compartments symmetrically at two sides of the keel on the bottom surface of the hull body; and   wherein each propulsion compartment lodges a propulsion engine located below the concave portions of the bottom surface of the hull body and between said two lateral flanks of the hull body such that the center of inertia of the vessel is displaced downward and toward the middle of the hull body.