Roton was a fascinating concept - and it was proposed as a Single Stage to Orbit launch vehicle.
en.m.wikipedia.org/wiki/Rotary_Rocket
I'm still not sold on what problems with normal rockets it was supposed to solve. It added a huge amount of complexity and mass for the rotors, where a better solution might just have been to add the equivalent mass of rocket fuel.
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evil_andy Stick stick stick stick sticky sticky stick stick, Thu 27 Aug 2020, 20:49,
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