Seeing is believing, as the saying goes. That's certainly what Reaction Engines hopes as it moves deeper into advanced tests of a novel pre-cooler that it believes could revolutionize air-breathing access to space. Designed to chill engine inlet air by more than 1,150C (2,100F) in less than one hundredth of a second, the pre-cooler is one of the key enabling technologies at the heart of the Sabre (synergetic air-breathing rocket engine). The hybrid propulsion system is designed for ...

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