"Robert Moore" wrote in message . 7...
(Koopas Ly) wrote

You'd also use some right rudder to keep the nose straight and
prevent it from "weathervaning".
Is this "weathervaning effect" caused by your leftward relative
motion due to the left bank OR by the rightward crosswind
ITSELF?

There is NO weathervaning effect until the wheels touch the ground.
Banking an airplane (putting a wing down) causes it to turn. You
use opposite rudder simply to keep it from turning due to the bank.

It's sort of the opposite of weathervaning. The vertical stab will normally keep the
tail in line with the aircraft (coordinated flight). Using the rudder will
force it out of line (and in alignment with the direction of travel on the ground).