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The British jet engine that failed in the 'Valley of Death'
Workers at Reaction Engines felt they were close to completing a revolutionary jet engine.
The secret sauce of Hotol was heat exchanger technology, an attempt to cool the super-heated 1,000C air that enters an engine at hypersonic speeds. Fast forward three decades to October 2024 and Reaction Engines was bringing the heat exchanger to life at sites in the UK and US. His former colleague Kathryn Evans headed up the space effort, the work around hypersonic flight for the Ministry of Defence and opportunities to apply the technology in any other commercial areas.
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