I saw this on telly last night and I am green with envy.
Hopefully he will break the sound barrier while the atmosphere is thin enough. Once he gets to a certain altitude the atmosphere is going to act like
one mother of a brake.
I wonder if the thin atmosphere will slow the speed of sound (less than 340.m.s). It could be that in the thin atmosphere the speed of sound could be
much slower due to the lower atmospheric pressure.
Yup, the speed of sound at 29Km is 301.m.s. A little, but probably not enough to make a difference.