World's first rotating detonation rocket engine flight ... maybe

In what may be a world first, Venus Aerospace has, for the first time in the US, successfully flown a Rotating Detonation Rocket Engine (RDRE) that uses supersonic explosions to create thrust. Such engines could help propel future hypersonic vehicles.

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https://newatlas.com/aircraft/worlds-first-rotating-detonation-rocket-engine-flight-maybe/