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Rotor ship
A rotor ship, or Flettner ship, is a type of ship designed to use the Magnus effect for propulsion. The Magnus effect is a force acting on a spinning body in a moving airstream, which acts perpendicularly to the direction of the airstream. Rotor ships typically use rotor sails powered by a motor to take advantage of the effect. German engineer Anton Flettner was the first to build a ship which attempted to tap this force for propulsion.
==Background==
A ''rotor'' or ''Flettner ship'' is a type of ship designed to use the Magnus effect for propulsion. The Magnus effect is a force acting on a spinning body in a moving airstream, which acts perpendicularly to the direction of the airstream. Rotor ships typically use rotor sails — spinning bodies that are essentially vertical cylinders — powered by a motor to take advantage of the effect. These types of propulsion cylinders are now commonly called Flettner rotors. Rotor ships have unique points of sail.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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