[TigersEye]

You mean like this shuttle launch video where it appears to be going pretty slow and the contrail is twisted, broken up and widening fairly fast at the base in less than two minutes?

Space Shuttle Launch. View from commercial flight!

Of course TXnMA says he proved there are only 12 seconds of actual Sky2 video so where you get 8 minutes is another mystery.

[Rokke]

"You mean like this shuttle launch video where it appears to be going pretty slow and the contrail is twisted, broken up and widening fairly fast at the base in less than two minutes?"

Cool video. You realize it was filmed from 38,000ft and in just over 30 secs the space shuttle had climbed well above the altitude of the aircraft from which it was filmed (and didn't slow down from there)? And while the contrail was twisted, it was never broken that I saw, and the last time the base was shown (35 secs after launch) it hadn't widened at all. For that matter, the exhaust trail of the largest missile we launch remained very narrow and distinct during the entire length of the video. Nothing like the contrail pictured off California.