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Reaction Engines and Rolls-Royce partner on high-speed aircraft systems; hybrid-electric systems

Reaction Engines Ltd and Rolls-Royce plc announced a new strategic partnership agreement to develop high-speed aircraft propulsion systems and explore applications for Reaction Engines’ thermal management technology within civil and defence aerospace gas turbine engines and hybrid-electric systems.

We have been working closely with Reaction Engines for the past two years, including exploring the potential of high-Mach systems for defence applications, and I am delighted that we are able to strengthen that relationship. This partnership follows our recent announcements with Boom Supersonic and Virgin Galactic.

Reaction Engines’ thermal management skills, added to our suite of existing technologies and capabilities, will further assist us as we explore opportunities in supersonic and hypersonic aviation. Building on our many decades of innovation, we will also explore the use of Reaction Engines’ technology within our aerospace gas turbines and its potential application in future hybrid-electric propulsion systems, as we look to make flying ever more efficient and sustainable.

—Mark Thompson, Director of Global Strategy & Business Development, Rolls-Royce


Additionally, Rolls-Royce is making a further investment in Reaction Engines as part of a wider funding round. The two companies have been working together since 2018, including on the first phase of a UK Ministry of Defense contract to undertake design studies, research, development, analysis and experimentation related to high-Mach advanced propulsion systems.

This strategic partnership is about developing market ready applications for Reaction Engines’ technology in next generation engines and is a significant step forward for our technology commercialization plans. Our proprietary heat exchanger technology delivers incredible heat transfer capabilities at extremely low weight and a compact size. We look forward to expanding our international collaboration with Rolls-Royce, a global leader in power systems, to bring to market a range of applications that will transform the performance and efficiency of aircraft engines, enable high speed—supersonic and hypersonic—flight and support the drive towards more sustainable aviation through innovative new technologies.

—Mark Thomas, Chief Executive of Reaction Engines



A Hypersonic Pre-cooled Turbine Combined Cycle engine burning zero carbon Ammonia would work. Over 50 years ago, the X-15 flew with Ammonia fuel.

Terry O'Malley

The future is, higher and faster. Out flying 4x missile defense systems.
Good stuff.


SpaceX must use this for starship long range commercial passenger travel instead of dirty methane...

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