Definition of rotor in English:
1A rotary part of a machine, in particular:
- As a message was typed into the machine, these rotors would spin around and calculate a letter to substitute for each letter of the message.
- This lessens the wear on brake drums, rotors and pads.
- Enigma allowed an operator to type in a message, then scramble it by means of three to five notched wheels, or rotors, which displayed different letters of the alphabet.
1.1A hub with a number of radiating aerofoils that is rotated in an approximately horizontal plane to provide the lift for a rotary wing aircraft.
- The aircraft featured two large rotors located in nacelles on the ends of its wings linked to an air-cooled Daimler Benz 600 engine in the fuselage.
- The aircraft would have launched standing upright like a rocket, but instead of using a blast of fire to take off the pilot would have simply adjusted the thrust and pitch of the rotors as with a helicopter.
- The sound of the helicopter's rumbling rotors became louder, as it flew by directly overhead us, and began hovering over the red smoke.
1.2The rotating assembly in a turbine.
- Should they malfunction or prove insufficient to slow the rotor in high winds, a large disk brake mounted on the generator shaft can smoothly bring the turbine to a halt.
- The higher-wattage plants, with their large-diameter, low-rotation-per-minute rotors, are designed to capture energy from low wind speeds.
- Take away the 2.2 birds killed by the rotors, and the balance for wind energy, + 1707.8 birds per turbine a year, is not bad.
1.4 (also rotor arm) The rotating part of the distributor of an internal-combustion engine which successively makes and breaks electrical contacts so that each spark plug fires in turn.
- Motorists who failed to immobilise their cars, by taking away the rotor arm from the distributor, were liable to find their tyres deflated by the police.
- I immediately changed the oil, plugs, distributor cap, rotor arm, and a friendly independent specialist fixed the exhaust.
- After 20 minutes he decided the problem was with the rotor arm, and fashioned some wire underneath it to solve the problem.
1.5The rotating container in a centrifuge.
- One junior intelligence analyst thought that although they weren't at all like modern American centrifuge rotors, they might be usable in what are known as a Zippe centrifuge.
- The Department of Energy rejected the claim that the country was importing aluminum tubes to produce centrifuge rotors for enriching uranium.
early 20th century: formed irregularly from rotator.