Sustainable technology to achieve things never thought possible.

Pursuing 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

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

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.

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

Business Development Manager, Applied Technologies

Sector Lead, Applied Technologies

Head of Performance and Aerothermal Engineering

Senior Human Resources Advisor

Aerothermal Engineer

Development Engineer, Applied Technologies Team

Materials Scientist and Quality Assurance Engineer

Assembly Operations Manager

Design Engineer: part of HX4 team

Chief Executive Officer

President, Reaction Engines Inc.

Head of Human Resources

Applied Technologies Director

Head of Engineering

Chief Financial Officer

Apprentice Mechanical Engineer

Apprentice Electrical Engineer

Apprentice Electrical Engineer

One team.
One vision.
Limitless potential.

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

Reaction Engines locations and facilities.

click the map to find out more

Reaction Engines

US subsidiary office based in
Littleton, Colorado. 


Test facility 2 (TF2)

HTX test programme location at
Front Range Airport, Colorado


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.