Rocket engine
Non-airbreathing engine used to propel a missile or vehicle
Rocket engine
A rocket engine is a reaction engine, producing thrust in accordance with Newton's third law by ejecting reaction mass rearward, usually a high-speed jet of high-temperature gas produced by the combustion of rocket propellant stored inside the rocket. Space vehicles carry their own oxidizer, unlike most combustion engines such as pulse engines or jet engines, so they can be used in a vacuum. Vehicles commonly propelled by rocket engines include missiles, artillery shells, ballistic missiles, and space vehicles. Compared to other types of jet engines, rocket engines typically have the highest thrust, but are the least propellant-efficient (they have the lowest specific impulse) but measures can be taken to increase the rockets efficiency and certain types of rocket engines can be extremely efficient (ex. hall effect thrusters).
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