Pulse jet propulsion, also known as pulse detonation propulsion, is a type of jet engine that operates by using a series of rapid combustion detonations to generate thrust. Synonyms for pulse jet propulsion include liquid-fueled pulse engines, continuous detonation engines, as well as pulse detonation wave engines. These propulsion systems are commonly used in unmanned aerial vehicles and missiles due to their high thrust-to-weight ratios and simplicity of design. Pulse jets can also be used as a ramjet engine at higher speeds, making them ideal for supersonic aircraft. Other related terms to pulse jet propulsion include pulsating thrust propulsion and pulse combustion engines.