Speed of sound vs. elevation
Trapnell:
I've already done it.
Launched from a B-57F at 65,000 feet while running 0.9 Mach.
Of course it was only good for one flight.
Haw.
But to speak true, I don't think anyone could fly such an airplane without a virtual cockpit. Watching and flying it from ground level would approach an impossibility. 250 mph is bad enough.
Fly your twin at Mach one plus -
. When it hits the tower, what a fuss!
Bill.