Based on the vertical axis cycloidal propeller (VSP), which has been a hallmark of maneuverability, minimum magnetism, least waterborne noise and best shock resistance for special mine counter measure vessels for decades, the cycloidal rudder (VCR) is under development. It is a new propulsion and maneuvering system for all ships requiring maximum maneuverability over the entire speed range, precise thrust control and auxiliary/emergency propulsion capability. During slow speed operation and maneuvering the cycloidal rudder operates in active mode similar to a two bladed vertical axis propeller. This enables precise, quick and safe maneuvers and best fuel economy. A t higher speeds, the two blades of the cycloidal rudder operate like a conventional twin rudder while the conventional propeller drives the vessel. The lower drag resistance of the cycloidal rudder increases the cruising efficiency of the vessel.
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