Boat propulsion system

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 1/18 (2006.01) B63H 5/16 (2006.01) B63B 39/06 (2006.01)

Patent

CA 2425639

A boat propulsion system includes a boat (52, 52', 152, 152') having an elongated hull (54, 54', 154, 154') with a water flow channel (56, 56A, 56B, 156A, 156B) formed in the bottom thereof, wherein a movable trim plate (68, 68A, 68B, 178A, 178B) is disposed within the water flow channel (56, 56A, 56B, 156A, 156B) for controlling a flow of water to a surface-piercing propeller (76, 76A, 76B, 176A, 176B) which is positioned aft of the water flow channel (56, 56A, 56B, 156A, 156B) and which is disposed within a propeller cavity (170, 170A, 170B) formed in the bottom of the hull (54, 54', 154, 154'). In a fully extended position, the trim plate (68, 68A, 68B, 178A, 178B) is flush with the hull of the boat, and in fully recessed position the trim plate (68, 68A, 68B, 178A, 178B) is completely recessed within the water flow channel (56, 56A, 56B, 156A, 156B). The trim plate (68, 68A, 68B, 178A, 178B) is variably movable between the recessed and fully extended positions to provide for perfomance advantages at various boat speeds.

La présente invention concerne un système de propulsion de bateau qui comprend un bateau (52, 52', 152, 152') à coque effilée (54, 54', 154, 154') avec un canal d'écoulement d'eau (56, 56A, 56B, 156A, 156B) formé au fond de cette coque. Une plaque de compensation d'assiette mobile (68, 68A, 68B, 178A, 178B) est placée dans ce canal d'écoulement d'eau (56, 56A, 56B, 156A, 156B) de façon à commander un écoulement d'eau vers une hélice semi-immergée (76, 76A, 76B, 176A, 176B), qui est positionnée à l'arrière de ce canal d'écoulement d'eau (56, 56A, 56B, 156A, 156B) et qui est placée dans une cavité pour hélice (170, 170A, 170B) formée au fond de la coque (54, 54', 154, 154'). En position complètement déployée, cette plaque de compensation d'assiette (68, 68A, 68B, 178A, 178B) est au même niveau que la coque du bateau, et en position complètement rentrée, cette plaque de compensation d'assiette (68, 68A, 68B, 178A, 178B) est complètement rentrée dans le canal d'écoulement d'eau (56, 56A, 56B, 156A, 156B). La mobilité de cette plaque de compensation d'assiette (68, 68A, 68B, 178A, 178B) peut varier dans des positions intermédiaires entre les positions complètement déployée et rentrée afin d'offrir des améliorations de performances aux diverses vitesses du bateau.

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