Quote:
Originally Posted by Edi
Contrails don't evaporate. They are already vapor. They disperse. Look up the difference between them. The rate of dispersal will vary according to local atmospheric conditions. And the contrails "disappear" only when they have dispersed enough that you can't see the vapor clusters.
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OK so I made a slight error in description. The fact is that normal contrail's seem to disappear a short distance behind the plane.
What I'm seeing does not disappear. It stays in the atmosphere.
Do you have any smart explanatiions for that?
One other point,contrials don't start and stop,they are consistant.