WATERCRAFT HAVING A FIN WITH CONTROLLABLE LIFT

摘要

A boat comprising a hull and a wing -shaped section extending outward from said hull, which is characterised in that the wing- shaped section is provided with several eccentrically driven shafts (14) having mutually different, circular cross - sections, which shafts jointly define the contour of the wing- shaped section and which, by rotating, are capable of deforming an enveloping flexible outer wall (16) of the wing- shaped section between a first position, in which the wing- shaped section generates a force on the boat in a first direction, and a second position, in which the wing- shaped section generates a force on the boat in a second direction opposite the first direction.