The Probert Encyclopaedia of Science & Technology

RAM-JET

A ram-jet is a jet engine with no compressor, in which air is drawn in and compressed by the forward motion of the engine. It has no moving parts, and is essentially a shaped duct, consisting of an intake section which acts as a compressor by slowing down the entering air, a combustion chamber where fuel is added and burnt, and a nozzle section in which the stream of hot gas is accelerated to give a high-speed exhaust jet. The jet provides propulsive thrust in a manner similar to that of a rocket. The ram-jet has to be launched at high speed, so has found limited application.
Research Ram-Jet