On Sat, 26 Jun 2004 12:13:59 -0500, "Carl Orton"
wrote:

Guess the real question is: At what altitude is a pressure suit required?

Was SpaceShip One pressurized? All we saw was Melville with an O2 mask.

My interpretation is that the cabin was sealed before takeoff. Negligible
leakage, so the ground-level pressure was maintained through the entire
flight. Melville had a mask to provide oxygen.

Pressure would have built as he exhaled CO2, but some sort of pressure
relief would have been easy to do.

Ron Wanttaja