In article ,
Michael Calwell wrote:

Hello,

Question from a complete landlubber.

I work outdoors beneath the flightpath to Edinburgh Airport.

I take it that vapour trails are the condensed water contained in the
air ingested by the engines. My question is, how much air does an engine
ingest at cruise? How would you visualise that amount of air?

Yours in amazement at how you stay aloft,

Michael


Vapor trails are also the condensed ice crystals resulting from just the
movement of the plane through the air. On a humid day, I can pull
contrails off my prop tips.