Patent ID: 7316194
Filing Date: 2008-01-08
Classification: B63H

Abstract:
1. A high-speed water vessel comprising: a hull with an underside; at least one high-speed propulsor attached to the underside of the hull, the at least one high-speed propulsor having one or more propellers, the one or more propellers having a propeller diameter, the one or more propellers generating a propeller slipstream downstream of the at least one high-speed propulsor, the slipstream having a slipstream diameter; at least one twisted rudder pair, the at least one twisted rudder pair located downstream of the at least one high-speed propulsor, the at least one twisted rudder pair rotatably mounted within a zone of effectiveness, wherein the zone of effectiveness is the region within the downstream projection of the propeller diameter that lies outside the slipstream diameter profile; and a controller for controlling the rotation of the at least one twisted rudder pair, the controller rotating the at least one twisted rudder pair so that portions of the rudder pair rotate from a position outside the slipstream diameter to a position within the slipstream diameter.