Originally Posted by
Bungfai
My B777 instructor told me not to bank into wind during strong cross wind takeoff, because it will induce roll spoilers to extend. But I still think that we must give a little bank into wind to keep wing level for high swept back wing aircraft. My instuctor told me that to bank into wind is the thing of the past. Any comments.
The critical factor is the lift generated in ground attitude just before rotation. If the aircraft is almost ready to lift its own weight, the rolling moment from the sideslip caused by the crosswind will lift the wing and aileron must be used to counteract this. Even if the wing doesn't lift, the different weights on left and right gear can make it hard to track the centreline.
I would imagine that the B777 needs a significant pitch rotation to get it to fly, thus the lift generated in ground attitude just before rotation may not be sufficient to cause directional issues without aileron input, even in strong crosswinds. For aircraft that "fly themselves off" at rotation, into-wind aileron is required.