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by flohofwoe 24 days ago
> Ramjets were developed right after the second world war

Development already started during WW2 as one of many German last-ditch experiments, for instance:

https://en.wikipedia.org/wiki/Kronach_Lorin

...it never went into an actually flying airplane though (apparently there were test flights with Lorin tubes attached to propeller planes, but only to test the Lorin tube behaviour under flight conditions, not as an engine replacement).

The idea and patent itself is over a century old by now:

https://en.wikipedia.org/wiki/Ren%C3%A9_Lorin