On Apr 2, 5:33 pm, "Vaughn Simon"
wrote:
"Marco Leon" wrote in message

...

Air does not "stick" to an airframe enough to change the ambient temperature
of a given area no matter how small.

No, but everyone who has ever studied for their Private written knows that
the wake of an aircraft is accelerated down. So the passage of an aircraft
would cause a very temporary downward flow of air. Would the effect be enough
to noticeably change local temperatures? I doubt it; but who the hell am I?

What time of day does he go by? I could see the downwash mixing up
the air, and if there is a hot surface layer this could cool it.

As an example of downwash changing the temperature, I have heard
helicopter pilot stories about 'frost flights' at strawberry farms.
The task is to spend the night at the farm, and if the frost alarm
goes off in the wee hours you have to fly low over the fields in the
dark until the air is stirred up and the frost danger goes away. It
apparently is very effective in preventing frost damaged berries.

John Halpenny