Message posted by Peter Merlin on September 07, 2006 at 12:32:13 PST:
I have seen airliners make contrails like this as they passed in and out of conditions allowing for condensation.
In Reply to: "Pulse Contrail Photo" in Av Leak posted by Picture in today's Aviation Leak and Space Mythology on September 05, 2006 at 19:27:25 PST:
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