[sandworm101]

And old assumption, widely held until the soviet Bear bombers shattered the misconception that propellers must remain subsonic.

https://en.wikipedia.org/wiki/Tupolev_Tu-95

[ceejayoz]

Or the appropriately named Thunderscreech.

https://en.wikipedia.org/wiki/Republic_XF-84H_Thunderscreech

[sandworm101]

Ya, three years after the bear. Call it an experimental fighter, but it was sputnik-style catchup. It was US designers saying WTF is that? They needed to figure out what the bear was capable of, so they needed to study supersonic propellers asagdp.