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Old 10-23-2004, 09:21 PM   #11
Kitsune
still eats dirt
 
Join Date: Sep 2003
Location: Tampa, FL
Posts: 3,031
TW -- you mean like this?

Three things produce vapor trails off a plane, I think. The engine exhaust, "sharp" edges (like winglets, flap edges, etc) that produce vortices, and the lifting edge of a wing, which produces pressure low enough to create condensation.
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