China claims world’s first kerosene-powered engine could propel jets nine times the speed of sound

https://interestingengineering.com/innovation/china-worlds-first-kerosene-powered-engine

"deliver passengers anywhere on the globe in only a few hours... succession of explosions are set off by the detonation wave. These explosions occur almost rapidly and release a lot more energy than traditional combustion does with the same amount of fuel, especially at speeds beyond Mach 8... adding a thumbnail-sized bump to the engine's air inlet surface facilitates kerosene ignition while maintaining a compact chamber... lowering construction and operating costs is still a significant problem"

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