China has tested a detonation hypersonic engine powered by coal powder

The new fuel format will be 20% cleaner and more efficient than similar blends. It is planned to use ethylene vapor mixed with coal powder. This is great for igniting fuel and starting the detonation process.

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Scientists at Nanjing University in China have unveiled a system that is six times the speed of sound. The result was a type of engine applicable for flights at different speeds, including on a hypersonic aircraft.

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In May 2022, the team introduced a similar kerosene and ethylene engine. The development of a hypersonic engine on ammonia is currently underway.