Reaction engine
Type of engine / From Wikipedia, the free encyclopedia
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This article is about a propulsion engine. For the British aerospace company, see Reaction Engines Limited.
"Reaction motor" redirects here. For the American aerospace company, see Reaction Motors.
A reaction engine is an engine or motor that produces thrust by expelling reaction mass (reaction propulsion),[1] in accordance with Newton's third law of motion. This law of motion is commonly paraphrased as: "For every action force there is an equal, but opposite, reaction force."
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Examples include jet engines, rocket engines, pump-jets, and more uncommon variations such as Hall effect thrusters, ion drives, mass drivers, and nuclear pulse propulsion.