Boy .. you gave up awfully quick. Not all contrails are flat straight lines you know.. what about those? (Not that aerial patterns are going to get you much, but still)
Ah well. Don't give up so easy, just because people shoot down your post or theory, doesn't mean you can't fire back with different answers or questions about THEIR answers. Might learn something that even helps you out on your own case.
I've learned a few things from ol' Engineer and others on here, just catching myself in "DUH"s and even stuff I just knew was right, but found out... wasn't. And I work in applied sciences every day! LOL
Take care,
John