Originally Posted by
EEngr
Ahem ...
Different flight regime and control laws. But it's been done.
There is a popular myth that the XB-70 did the drooped wing thing when supersonic to 'trap' the shock wave and create lift. However I read a rather good book on the XB-70 a while back ("VALKYRIE North American's Mach 3 Super Bomber" - I recommend it if you share my fascination with XB-70). According to the book, while the wing design did in fact create lift from the shock, the drooped wing tips were related to improving high speed stability, not the trapped shock wave lift.