Sustainable technology to achieve things never thought possible.

Enabling net zero.
Transforming high-speed flight.
Pioneering access to space.

We are a privately held technology Company pioneering space access and sustainable technologies. For over 30 years we have been at the forefront of engineering innovation – including developing SABRE, a revolutionary new class of aerospace propulsion. SABRE enables us to go beyond the limits of flight both within and outside the atmosphere. Making space travel and high-speed flight more efficient, more accessible, more possible.

Developed for SABRE, our proprietary precooler technology is truly transformational. It delivers world-leading heat transfer capabilities across diverse industries to improve performance in motorsport, convert waste heat into renewable electricity and support more sustainable aviation. These revolutionary thermal management solutions have the potential to elevate life on Earth.

Advanced Propulsion

Reaching new
heights.

Our advanced propulsion capabilities can make air travel more efficient, more sustainable, and the world more reachable.
Advance Propulsion

Applied Technologies

From outer space
to your place.

We apply what we learn from our space technology to help diverse industries become more efficient and sustainable.
Applied Technologies

Our partners.

Our innovative technology has the backing of some of the most influential names in aerospace and finance. We’re supported by the UK government, UK Space Agency and European Space Agency and our US team are working with US Government and industry partners. There’s really never been a better time to join us on the journey. 

As Reaction Engines unlocks advanced propulsion that could change the future of air and space travel, we expect to leverage their revolutionary technology to support Boeing’s pursuit of hypersonic flight.
Steve Nordlund
Vice President, Boeing HorizonX
We look forward to working with REL and assisting with the development of their technology, and we plan to incorporate this technology into our own future products.
Paul Stein
Chief Technology Officer, Rolls-Royce

One team.
One vision.
Limitless potential.

Our people are truly dedicated to making beyond possible. Every single day.

Reaction Engines locations and facilities.

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Reaction Engines

US subsidiary office based in
Littleton, Colorado. 

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Test facility 2 (TF2)

HTX test programme location at
Front Range Airport, Colorado.

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Head Quarters

Head office located at Culham Science Centre, 20 minutes from the Harwell space gateway and 30 minutes from Oxford City Centre. Excellent links to London via rail and road.

Reaction Engines

US subsidiary office based in
Littleton, Colorado. 

LEARN MORE >


Test facility 2 (TF2)

HTX test programme location at
Front Range Airport, Colorado. 

LEARN MORE >

Head Quarters

Head office located at Culham Science Centre, 20 minutes from the Harwell space gateway and 30 minutes from Oxford City Centre. Excellent links to London via rail and road.