Rotating Detonation Engines (RDE) have been flown by Venus Aerospace. They use continuous detonation waves for propulsion and provide 15% efficiency gains (in specific impulse or fuel consumption) over traditional deflagrative engines. They could potential provide for 25-30% or more efficiency when hybridized with air-breathing systems for hypersonic applications. A past gain of 15-30% gain ...

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Link :
https://www.nextbigfuture.com/2025/07/historic-aviation-engine-advance-to-unlock-hypersonic-mach-10-planes.html