It is perfectly feasible to throw a shockwave when the free stream Mach number (MFS) is below 1.0.
It is important to remember that a wing shockwave forms where air is decelerated from supersonic to subsonic speed. Increased AoA results in increased acceleration over the wing upper surface. It is therefore possible to "throw" a shockwave when MFS is below 1 at high g. I know, I have done it during displays at 8g.
A2QFI
Sorry mate, but I have had a Jaguar at 690knots/M1.05 at low level - it was clean of course. The Lightning would do it with no trouble at all. PM me if you wish.
Oh, and to all Jaguar bashers, it was very quick if you knew how to do it.
Orrabest to you all,
Lighning Mate (six years and 900 hours) (and Jaguar, almost eight and 1850 hours).
..... don't give me a hard time, I'm now old and fragile.....