// PROPULSION SYSTEMS AND ENGINE TECHNOLOGY TERM
Pulsejet
A pulsejet is a simple type of jet engine that produces thrust through a series of rapid, explosive combustion events or 'pulses'. It is mechanically simple, often having no moving parts, but is typically very loud and inefficient compared to modern engines.
TECHNICAL DEFINITION
A pulsejet is an air-breathing jet engine that generates propulsive thrust via intermittent, resonant combustion within a tubular duct, creating a series of high-pressure exhaust pulses. Operating on a principle similar to the Lenoir cycle, this mechanically simple propulsion system, which can be valved (like the Argus As 014) or valveless, is characterized by its distinct acoustic signature and historical use in vehicles like the V-1 flying bomb.
BACKGROUND
The aerospike engine is a type of rocket engine that maintains its aerodynamic efficiency across a wide range of altitudes. It belongs to the class of altitude compensating nozzle engines. Aerospike engines were proposed for many single-stage-to-orbit (SSTO) designs. They were a contender for the Space Shuttle main engine. However, as of early 2026 no such engine was in commercial production, although some large-scale aerospikes were in testing phases.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Resojet
- Argus tube
- Intermittent jet engine
- Pulse combustion engine
- Valveless pulsejet
USAGE NOTE
Primarily found in hobbyist applications like model aircraft and historical designs, pulsejets are rarely used in modern aerospace due to their high noise levels and poor fuel efficiency.
DEVELOPERS
Organizations developing technology related to Pulsejet.
A key US military research organization that has conducted extensive research and development on Pulse Detonation Engines (PDEs) for next-generation missiles and high-speed aircraft, aiming to improve fuel efficiency and performance.
This NASA center has been a leader in fundamental and applied research on Pulse Detonation Engines (PDEs), conducting experiments and computational modeling to mature the technology for future aerospace applications.
A major aerospace engine manufacturer that has heavily invested in R&D for pulse detonation technology. The company holds numerous patents related to PDEs and has collaborated on government-sponsored programs to develop and test prototype engines.
As a leading producer of jet engines, GE has been actively researching advanced propulsion concepts, including Pulse Detonation Engines (PDEs) and the related Rotating Detonation Engines (RDEs), to enable more efficient, high-Mach flight.
A prominent developer of rocket and missile propulsion systems that has researched and developed pulse detonation engine technology, primarily for missile and space launch applications, leveraging the concept's potential for high specific impulse.
A startup developing a hypersonic aircraft powered by a Rotating Detonation Rocket Engine (RDRE), a continuous-wave evolution of the pulsejet and pulse detonation engine concept designed for extreme speeds.
One of the world's largest academic propulsion labs, Zucrow Labs conducts cutting-edge research into detonation-based propulsion, including experimental and computational studies of both Pulse Detonation Engines (PDEs) and Rotating Detonation Engines (RDEs).