GE and Lockheed ground tested a new air-breathing hypersonic jet engine capable of powering missiles to speeds well in excess of Mach 5 in a smaller, cheaper, lighter, and more efficient package than the most advanced scramjets in testing today. It is a rotating detonating engine. They did ground tests of a liquid-fueled rotating detonation ...

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Link :
https://www.nextbigfuture.com/2026/01/lockheed-and-ge-test-hypersonic-engine.html