If the guy is smart at all, he'll go into a wind tunnel with it and try it out first. Anything around or much over 150mph, he's just asking to go airborne/out of control.

Here's a speed record attempt that ended you could say...a bit unexpectedly. They left out.....nose packed full of what appears to be volcanic ash.

http://www.youtube.com/watch?v=rTfu0hjVtzE