Vectored Propulsion System for Sea-Going Vessels
Patent, Filed 9 Sep 1997, patented 24 Aug 1999
DEPARTMENT OF THE NAVY WASHINGTON DC
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A thrust block is positioned by a steerable support in spaced relation to the hull of a seagoing vessel for angular displacement about a propeller axis and the axis of said hull intersecting the propeller axis. Forward and aft sets of propellers are rotatably mounted by hubs in the thrust block for contrarotation by propulsion motors having rotors respectively fixed to the radially outer tips off forward and aft propeller blades and electrically energized by current conducted thereto through stator and rotor windings of transformers respectively mounted in the thrust block and the propeller hubs to avoid propulsive torque transmission by the thrust block. The rotors of the propulsion motors are protectively enclosed by a radially outer shroud assembly which accommodates hydrodynamic cooling during motor operation.
- Marine Engineering