This New Rocket Engine Uses Shock Waves As Propellant
Japan Aerospace Exploration Agency (JAXA) has successfully tested a more efficient type of rocket engine that is propelled by shock waves. It's a type of rotating detonation engine (RDE), and in the test, it lifted a 30-foot (8-m) single-stage rocket.
https://interestingengineering.com/japans-new-rocket-engine-uses-shock-waves-as-propellant?utm_source=tldrnewsletter