Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 39

jet engine - History, Types, Type comparison, Turbojet engines, Turbofan engines, Major components, Advanced designs, Trivia

force thrust

An engine that accelerates a fluid into its surrounding environment to form a fast-moving jet. The reaction felt by the engine to this expulsion is the thrust force, which acts in the opposite direction to the jet. This reactive thrust force is the propulsion force of the engine. Although by definition a rocket motor and a ship's propeller produce thrust in this way, the term is usually taken to apply to air-breathing engines such as turbojets and ramjets.

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