There are 2 speeds: Indicated airspeed and true airspeed. The speed that the jumper will feel in freefall is always indicated airspeed and for a jumper that falls at an indicated airspeed of 120 mph, he will fall at that same indicated airspeed regardless of altitude (except when going so high there is no air at all). If you could take an airspeed indicator with you in freefall, it would always register the same airspeed, indicated airspeed, regardless of altitude for a give body position. Your true airspeed will change with altitude and at 41,000' your true airspeed, with an indicated airspeed of 120 mph, would be about (depending on temperature) 245 mph. However, your body would only feel the indicated airspeed of 120 mph.
Mike Mullins
Oh yes I will.
Mike