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Old July 22 2012, 03:26 AM   #4594
Admiral Buzzkill
Fleet Admiral
Re: Superman (casting, rumors, pix till release)

JarodRussell wrote: View Post
My Name Is Legion wrote: View Post
JarodRussell wrote: View Post
Why does Superman leave white trails in the sky?
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.
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