Force on pilot ejecting at supersonic speeds?

Using the Rayleigh drag equation, and approximations for the air density, drag and frontal area of the pilot, and mass, at around 300 m/s (subsonic) a pilot might experience deceleration forces of about 40G. BTW, I assumed a drag coefficient of 1 since a Human being strapped to a chair is not especially aerodynamically slippery.

Now, if that was raised by another 100 m/s making it supersonic, how much would the force increase disproportionately?

Note that one person has ejected at low altitude supersonic and lived - just. So, how much of a difference does being on the wrong side of that dividing line make?

• That would be one heck of a head rush! That guy is remarkably luck to be alive. – user77400 Apr 17 '15 at 8:55
• I would have expected his head to be twisted to one side so fast as to break his neck – user56903 Apr 17 '15 at 8:56
• Absolutely! I wonder if a suit to withstand these forces, and the forces described in your question could be possible – user77400 Apr 17 '15 at 8:58
• Precisely! at supersonic speed its a wonder he haven't burn up during re-entry. – user6760 Apr 17 '15 at 9:11