Originally Posted by
applecrumble
Anyone able to explain the aerodynamics of why more aileron is required to maintain wings level at lift off during a crosswind?
It's never a good idea to establish a need for a specific control input for a given instant in time when dealing with aerodynamics. Flying an airplane is performed in a 3 dimensional fluid dynamic where absolutely nothing is static and the dynamic is in a state of constant change.
Rotation is an extremely complex moment of transition. Depending on the aircraft being flown there are many factors in play during rotation, the wind being only one of these factors.
The main thing as relates to control usage is in remembering that no two takeoffs will ever be EXACTLY the same as relates to wind. Of course there are certain "standards" we start out with for aileron use during the takeoff run but even these standards are subject to instant change as the run progresses.
The best way to look at control usage during takeoff and rotation is to accept that nothing is ever written in stone. The aircraft itself is the best indicator for what control pressures are required at any given instant in time. What you corrected for on takeoff A will be different either as necessary or in the amount of required pressure on takeoff B.
The aircraft is the best flight instructor a pilot will ever know.
Dudley Henriques