G
But that is going to be relative to the day in question that the tests are carried out? How strong the winds that day, the direction, are they steady or gusting? If gusting to what factor? Shear conditions.
Do they take the aircraft up on a 40KT wind day decide what the limit is and then knock half of it off ? I am not clear how they arrive at those figures.
Others have talked about enough rudder authority to maintain the runway centreline yet when I think about it it is commonplace at FL360 in a small jet to track an airways with 100 KTS cross
Pace