System for improving the manoeuvrability of a boat''s hull and for reducing its friction with water

Abstract

A system for reducing the friction generated by the contact between the water and a moving boat's hull is described, comprising a plurality of freely rotating bodies arranged on the hull's surface, for absorbing the majority of the forces exerted by the water flow on the boat.

1 - 16 . (canceled)  
   
   
       17 . A system for improving the handiness of a boat's hull and for reducing its friction with water, comprising a number of bodies consisting in bodies of revolution lodged into housings preferably recessed from the outer surface of the hull, characterized in that said bodies protrude from the hull with the least extent necessary to generate their rotation, and they are made to rotate in controllable way by the water surrounding the boat, for absorbing the majority of the forces exerted by the water flow on the boat for reducing the global friction generated by the hull which is in continuous contact with water.  
   
   
       18 . The system according to  claim 17 , characterized in that said rotating bodies are arranged along the hull according to variable settings in continuous and/or discontinuous, perpendicular, staggered, waving, interrupted and/or tilted rows, even on more planes at different heights, of elements being all the same kind and/or of different types with various combinations of the elements' arrangement, according the specific needs of any single boat.  
   
   
       19 . The system according to  claim 17 , characterized in that said rotating bodies have various shapes matching the hydrodynamic performance of the vessel.  
   
   
       20 . The system according to  claim 17 , characterized in that the size of said rotating bodies is compatible and proportioned to the boat's total dimensions.  
   
   
       21 . The system according to  claim 17 , characterized in that the housings that lodge the freely rotating bodies increase the resistance and the elasticity of the hull, guaranteeing the absorption of the hits caused by the waves.  
   
   
       22 . The system according to  claim 17 , characterized in that the liquid sets on the rotating bodies also through outer and/or inner surface channels of the boat.  
   
   
       23 . The system according to  claim 22 , characterized in that the liquid inflow to the inner channels is adjustable up to the complete closure of its entrance with a consequent return to the original hull's outline.  
   
   
       24 . The system according to  claim 22 , characterized in that the liquid inflow to the outer channels is adjusted by a mobile device located at the beginning of the groove with the possibility of returning to the original hull's outline.  
   
   
       25 . The system according  claim 17 , characterized in that revolving blades are also provided in order to increase the stability, and the handiness of the boat, as well as to control its speed.  
   
   
       26 . The system according to  claim 25 , characterized in that the blades can be made of any shape fit to the desired features of the flow.  
   
   
       27 . The system according to  claim 17 , characterized by providing a number of bladed wheels variably disposed on the boat's hull.  
   
   
       28 . The system according  claim 17 , characterized in that the state of said rotating bodies and the driving units of the various mobile elements are connected to a hydraulic control unit, it too controlled by a programmed electronic device able to actively change different settings of said rotating bodies and said mobile elements.