S/R-71 Blackbird... Mach 3.2.
I had it for FS 2000.
If I remember correctly the thing crashed my PC every time I would go 'above' 100 000 ft. The image would freeze and but my altimeter would go crazy.
The plane was beautifull, I cant seem to find it again.
You might mean the one I did a while back, you can get it here: http://www.simviation.com/fs2002military3.htm
It was however very unrealistic. Flying Mach 3 at 3 000 ft....
Ah, that's so Ozzy can go inverted and give the tailfins a Mach 3 wash in the Atlantic! ;D
