Rotor may refer to:

Science and technology

Engineering

* Rotor (electric), the non-stationary part of an alternator or electric motor, operating with a stationary element so called the stator *

Helicopter rotor A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerody ...

, the rotary wing(s) of a rotorcraft such as a helicopter * ROTOR, a former radar project in the UK following the Second World War *

Rotor (turbine) A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating e ...

, the rotor of a turbine powered by fluid pressure *

Rotor (crank) The crankset (in the US) or chainset (in the UK), is the component of a bicycle drivetrain that converts the reciprocating motion of the rider's legs into rotational motion used to drive the chain or belt, which in turn drives the rear wheel. ...

, a variable-angle bicycle crank *Rotor (brake), the disc of a

disc brake A disc brake is a type of brake that uses the calipers to squeeze pairs of pads against a disc or a "rotor" to create friction. This action slows the rotation of a shaft, such as a vehicle axle, either to reduce its rotational speed or to hol ...

, in U.S. terminology * Rotor (brake mechanism), a device that allows the handlebars and fork to revolve indefinitely without tangling the rear brake cable - see Detangler *

Rotor (distributor) A distributor is an enclosed rotating switch used in spark-ignition internal combustion engines that have mechanically timed ignition. The distributor's main function is to route high voltage current from the ignition coil to the spark plu ...

, a component of the ignition system of an internal combustion engine *

Pistonless rotary engine A pistonless rotary engine is an internal combustion engine that does not use pistons in the way a reciprocating engine does. Designs vary widely but typically involve one or more rotors, sometimes called rotary pistons. Although many different ...

Rotor (antenna) An antenna rotator (or antenna rotor) is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally plac ...

Computing

* Rotor machine, the rotating wheels used in certain cipher machines, such as the German Enigma machine ** Rotor (Enigma machine), a rotating part of the German Enigma machine * Rotor (software project), the former code name for Microsoft's shared source implementation of its Common Language Infrastructure

Chemistry

* The rotating part of a

centrifuge A centrifuge is a device that uses centrifugal force to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or ...

, which also holds the samples *

Rigid rotor In rotordynamics, the rigid rotor is a mechanical model of rotating systems. An arbitrary rigid rotor is a 3-dimensional rigid object, such as a top. To orient such an object in space requires three angles, known as Euler angles. A special rigi ...

, a mathematical model for rotating systems (usually molecules)

Medicine

Rotor syndrome Rotor syndrome (also known as Rotor type hyperbilirubinemia) is a rare cause of mixed direct (conjugated) and indirect (unconjugated) hyperbilirubinemia, relatively benign, autosomal recessive bilirubin disorder characterized by non-hemolytic jau ...

, a rare liver disorder

Mathematics

* Rotor (mathematics), an even-graded multivector used to produce rotations and some other affine transformations * Curl (mathematics), known as rotor in some countries, a vector operator that shows a vector field's rate of rotation

Other uses

SC Rotor Volgograd SC Rotor Volgograd (russian: СK Ротор) is a Russian professional football club from the large city of Volgograd, Volgograd Oblast (formerly Stalingrad). The club will play in the third-tier Russian Football National League 2 in the 2022– ...

, a Russian football club *

Rotor (Sonic the Hedgehog) ''Sonic the Hedgehog'' was an American comic book series published by Archie Comics, in partnership with Sega. The series was based on Sega's video game franchise, as well as on the 1993 animated series of the same name. After initially beginn ...

, a fictional character from the Sonic the Hedgehog universe * Rotor (ride), the trade name for an amusement ride * Rotor (meteorology), a turbulent horizontal vortex that forms in the trough of lee waves *Rotor, a space colony in Isaac Asimov's novel ''

Nemesis In ancient Greek religion, Nemesis, also called Rhamnousia or Rhamnusia ( grc, Ῥαμνουσία, Rhamnousía, the goddess of Rhamnous), was the goddess who personifies retribution, a central concept in the Greek world view. Etymology The n ...

'' *''

R.O.T.O.R. ''R.O.T.O.R.'' (also known as ''Blue Steel'' and ''R.O.T.O.R.: Police Force'') is a 1987 American science fiction action film starring Richard Gesswein, Jayne Smith and Margaret Trigg. The film has been described as a low-budget copy of ''The Te ...

'', a 1987 science fiction/action movie {{disambiguation