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About Us

Our Company

Welcome to Reaction Engines Ltd – pioneering the next generation of hypersonic and space access propulsion.

Reaction Engines is a UK-based company formed in 1989 to design and develop the technologies needed for a new class of innovative hypersonic propulsion system – the Synergetic Air-Breathing Rocket Engine (SABRE).

We have achieved a breakthrough in aerospace engine technology by developing ultra-lightweight heat exchangers. These are capable of cooling airstreams from over 1,000°C to -150°C in less than 1/20th of a second with world leading compactness and low weight. Developed for our high speed SABRE engines, the heat exchangers stop engine components from overheating at high flight speeds, opening up a new era of high speed flight. SABRE class engines will enable aircraft to fly over five times the speed of sound in the atmosphere and allow space launch vehicles to be built that will radically improve the affordability and responsiveness of access to space.

We are focused on delivering a ground based demonstration of the SABRE engine, an event as significant as the first ground test of the jet engine. We are supported by a £60m funding commitment from the UK Government via the UK Space Agency and the European Space Agency and we have had a recent £20.6m investment by BAE Systems.

We have begun partnering with aerospace suppliers to deliver a ground-based SABRE demonstrator engine. There’s never been a better time to join us on the journey.

Reaction Engines, Inc.

We're taking innovative technologies to US markets with our US-based and US-staffed subsidiary, Reaction Engines, Inc. based in Castle Rock, Colorado. Reaction Engines, Inc. supports the expansion of the company’s development efforts and leads engagement with potential US government and industry partners. Our US arm builds upon the excellent collaborative R&D efforts already accomplished with the Air Force Research Laboratory and NASA, and positions Reaction Engines' technology for future users and markets.

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