An RDE is theoretically more efficient than conventional deflagrative combustion by as much as 25%. The concept has been known for some time but is finally making progress due to new materials/modeling.

Sources & Credits:
ICE
https://www.youtube.com/watch?v=O0yM5RlD7Zo
https://www.youtube.com/watch?v=JoQkTIfAB2U
https://www.youtube.com/watch?v=jHVsTwgNjoo

Pulse Detonation
https://www.youtube.com/watch?v=rSzUIoaOvko
https://www.youtube.com/watch?v=nqLzaJdP8yU
https://www.youtube.com/watch?v=1xVz14508ZU&t=1s

RDE
https://www.youtube.com/watch?v=Fo1zyT1R7qs&t=1s
https://www.youtube.com/watch?v=QBP1_eGUjqU
https://www.youtube.com/watch?v=ERTei7D8LJs
https://www.nasa.gov/centers/marshall/feature/nasa-validates-revolutionary-propulsion-design-for-deep-space-missions

By: Tech Planet
Title: NEW Aerospace ENGINE Destroys ROCKETS
Sourced From: www.youtube.com/watch?v=uqGBGnh_8JM

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