Hull and propeller arrangement

Details Hull and propeller arrangement Hull and propeller arrangement

B - Operations, Transporting

63

B

B63B 1/16 (2006.01) B63B 35/79 (2006.01) B63H 1/14 (2006.01) B63H 5/16 (2006.01)

Patent

CA 2412300

Hull and propeller arrangement for a surface watercraft (1), provided with at least one propeller (3), in addition to which the propeller (3), at high speeds of the watercraft, is surface-piercing, and the propeller (3) is arranged in such a manner that only the propeller blades (11) or parts thereof are submerged in the water at high speeds of the watercraft (1), in addition to which the hull (2) is provided with at least one streamlined projecting part (4) extends essentially in the longitudinal direction of the hull (2), the projecting part (4), in terms of its outer shape, has, at its aft end (6), an end edge (15) which, at least in part, extends essentially transversely to the longitudinal direction of the projecting part (4), the propeller (3) is locaded immediately astern of the end edge (15), and a part of the propeller, in the radial direction, extends beyond the delimiting surfaces of the projecting part (4). Each projecting part (4) is arranged in such a manner that, at high speeds of the watercraft (1), a bearing area (8) for the watercraft (1) is formed, which consists essentially of a part of the surface of the projecting part (4), which is situated immediately forward of the end edge (15) and on the very bottom of the projecting part (4).

L'invention concerne un ensemble coque-hélice pour engin flottant (1) de surface comprenant au moins une hélice (3), ladite hélice (3) étant d'une part, une hélice semi-immergée lorsque l'engin flottant évolue à grande vitesse, et ladite hélice (3) étant d'autre part conçue de manière que seules les pales (11) ou une partie de celles-ci soient immergées dans l'eau lorsque l'engin flottant (1) évolue à grande vitesse. En outre, la coque (2) comporte au moins une partie saillante (4) aérodynamique s'étendant sensiblement dans le sens longitudinal de la coque (2), ladite partie saillante (4) présentant, en termes de forme extérieure et au niveau de son extrémité arrière (6), un bord terminal (15) qui s'étend, tout du moins en partie, sensiblement transversalement au sens longitudinal de la partie saillante (4), l'hélice (3) étant située immédiatement à l'arrière du bord terminal (15), et une partie de l'hélice s'étendant, dans le sens radial, au-delà des surfaces de délimitation de ladite partie saillante (4). Chaque partie saillante (4) est conçue de manière à former, lorsque l'engin flottant (1) évolue à grande vitesse, une surface portante (8) pour l'engin flottant (1), laquelle surface correspond essentiellement à une partie de la surface de la partie saillante (4) située immédiatement à l'avant du bord terminal (15), sur la partie inférieure de la partie saillante (4).

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