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Old July 22 2012, 03:53 AM   #4595
Trekker4747
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Re: Superman (casting, rumors, pix till release)

My Name Is Legion wrote: View Post
JarodRussell wrote: View Post
My Name Is Legion wrote: View Post

Because contrails aren't created by jet technology.
By water vapor from jet engines, or by the pressure differences in the vortex around each wingtip.
The "or" there lets the air out (so to speak) of the "does he have jet engines" question.

Contrails are created by the condensation of water vapor, like any other cloud.
Yep. Any flying object (or moving object, really) creates a wake in the air behind it. A man flying at supersonic speeds is going to create a LOT of air disturbance in his wake especially as air is moved around him, gets compressed behind him, condensing water in the atmosphere into a visible vapor.
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