A pulsejet engine (also known as simply a "pulsejet") is a kind of
jet engine. Its first significant use was as the
propulsion system of
Germany's
V-1 missile, also known as the "
buzz-bomb", due to the characteristically loud sound of the pulsejet.
The simplest version of the pulsejet consists essentially of a metal tube (acting as the combustion chamber), a fuel injector, and a reed valve.
Due to the simplicity of the design, interested hobbyists can build their own pulsejet engine.