Contrails
I hope this isn't too obvious to everyone else but I'm so curious about it I've joined the forum to get an answer. I live near HUY and about an hour ago a 4 engined aircraft passed over, very high and emitting strong contrails. The contrails on one side of the aircraft stayed as a continuous line but on the other (port side, i think) broke up into very clear, equidistant, circles, at a point about half a mile behind the aircraft. Why would this be??
regards...