YOU should know better, with your experience!!
Go to carnicom.com.
"Cliff Carnicorn" is one of the HOAX spreaders!! He has a financial interest in it.
You, of all people should realize that everything on that site is a lie.
When a jet turns sharply it can leave a contrail off the wingtips that dissappears almost immediately. That's condensation.
Yes. Well known phenomenon. It IS transient, because it evaporates back to vapor state quickly, due to the method of initial formation.
If it sticks around that is not a condensate.
YES it is!! (Hint: We also call those "clouds". Do you deny that clouds can "stick around"? Are clouds not condensed water? Or, in the case of CIRRUS clouds, condensed out ice crystals??)
Engine exhaust is very hot.
Yes, of course. Know what else is there???
Hot and cold mix. You get condensation.
Oversimplified, but yes. Know what else is added, to the existing moisture content of the air??
But it DOES NOT stick around for hours.
Really? Then, what is a cloud???