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Air Force Research has developed a working detonation engine.
This will propel rockets, using much less fuel
https://www.sciencealert.com/rocket-scientists-have-built-and-tested-an-impossible-engine
If this engine can provide Single Stage to Orbit (SSTO), it's a really big deal.
That was my first thought too. As it is SSTO is a white elephant, but this could change that.
Here's some technical data from NRL...
https://www.nrl.navy.mil/content_images/11_FA2.pdf
Sounds like rocket science...