An aircraft in a constant air mass will not suddenly change direction in relation to the earth if that air mass suddenly changes direction. It takes time for the aircraft to accelerate, decelerate or otherwise change direction in line with the new constant (vector) due to its inertia (which has everything to do with mass).
Totally agree...
...and vice versa...a rapid air mass direction change...or a rapid aircraft direction change.
It takes time for the aircraft to accelerate, decelerate or otherwise change direction in line with the new constant (vector) due to its INERTIA (which has everything to do with MASS).
ed. (my bold)
Thanks for the help in explaining.
Cheers!