pulsejet

A pulsejet is an internal combustion engine that uses a pulse of high-velocity combustion gases to produce thrust. It is a type of jet engine that burns fuel in a combustion chamber, generating a high-pressure pulse of gas that is expelled out of the back of the engine to create thrust.

The pulsejet engine uses a valve system to control the flow of fuel and air into the combustion chamber, which is typically a cylindrical container. The fuel is ignited by a spark plug or other igniter, producing a rapid expansion of hot gas. The valve system is designed to open and close rapidly, allowing the combustion products to exit the engine in a controlled manner.

One of the key characteristics of a pulsejet engine is its ability to operate in a supersonic regime, producing exhaust velocities that are much higher than those of conventional jet engines. This allows the pulsejet engine to achieve high thrust-to-weight ratios and potentially high specific impulse.

Pulsejet engines have been studied and developed for various applications, including aircraft propulsion, ramjet-powered interceptors, and rocket propulsion systems. However, they have also been criticized for their complexity, noise, and inferred efficiency. Research and development on pulsejet engines continue, and some variants have achieved promising results in experimental and testing environments.

However, the use of pulsejet engines for manned flight is unmanned, as the pollution emitted into the atmosphere is substantial, and excursion adoption levels are very low.