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Hoosierguy2 t1_iy94qc0 wrote

Reply to comment by KechtmutAlTunichtgut in Rolls-Royce successfully tests hydrogen-powered jet engine | Britain's Rolls-Royce said it has successfully run an aircraft engine on hydrogen, a world aviation first that marks a major step towards proving the gas could be key to decarbonising air travel. by yourSAS

They did test hydrogen with a standard j-57. The 304 was a highly optimized configuration. It had a massive heat exchanger after the cumbustors and it looked more like a steam turbine inside. Lots of tiny bladed compressor stages

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