The 262 swept wing was not designed with Busemann's theories in mind, but rather a correction of some botched calculations. The result was the highest mach number for WWII jet fighters in a dive. It's called serendipity.
The Supermarine Spitfire exceeded that speed in Martindale's experimental dives, although I doubt transonic theories entered into Shenstone's design calculations. Martindale was probably lucky that the Spitfire's elevator balance had been modified due to shortcomings in conversion of Spit Vs to fighter-bomber. Also serendipity. Sometimes, you get the bear.
Further 262 designs were planned with greater sweep, with Busemann's consultation, but the napkins were destroyed by bombs. That's called just doom. Supermarine's fate wasn't much better.
The Supermarine Spitfire exceeded that speed in Martindale's experimental dives, although I doubt transonic theories entered into Shenstone's design calculations. Martindale was probably lucky that the Spitfire's elevator balance had been modified due to shortcomings in conversion of Spit Vs to fighter-bomber. Also serendipity. Sometimes, you get the bear.
Further 262 designs were planned with greater sweep, with Busemann's consultation, but the napkins were destroyed by bombs. That's called just doom. Supermarine's fate wasn't much better.