Originally Posted By: 4/4sportsfun
Falling through the sound barrier -that's about 690 mph in old money without a safety net.
Sure, but thats down here around sea level.
At 30,000 ft + for example where its a lot colder, it is about 590.
Presumably thats why he goes so much higher than that, and with less drag as well he can reach the local speed of sound quite quickly.
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Kevin
Black/tan 4/4 sport
Hi Bulldog
He topped 725mph in the Stratosphere
pretty crazy and fiercely brave stuff.
Richard
