Rotor usually refers to the rotating part of a machine such as a motor, generator, alternator, pump, or helicopter. The part of the machine that does not rotate is called a stator.

Uses

• The flying part of a helicopter is a rotor.
• In electrical engineering, the rotor of an electric motor or dynamo is the moving element, while the stationary element is called the stator. The rotor may also be called (sometimes erroneously) the armature.
• In automotive mechanics, the disc in a disc brake. It can also be part of a distributor, or the rotor in a Wankel engine
• Certain cipher machines, such as the German Enigma machine, made use of rotating wheels, see rotor machine in connection with these devices.
• In radio, a rotor is an electric motor designed to turn a receiving antenna to match the direction of the received signal.

Acronyms and code names

• The ROTOR radar project, the UK's first national air defence system following the Second World War, incorporating some Chain Home radar stations.
• Rotor is the code name for Microsoft's shared source implementation of the Common Language Infrastructure.

Entertainment

• Rotor is the name of a planet in the Isaac Asimov's book Nemesis
• SC Rotor Volgograd is a Russian football club.
• Rotor is a fictional character from the Sonic the Hedgehog universe Rotor (Sonic the Hedgehog).
• Rotor is the trade name for an amusement ride.

Meteorology

• Rotor refers to turbulent whirlwinds that form close to mountains. See lee waves.

Mechanical engineering | Aerospace engineering

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