How will we
Keep coordinated(ball),
if we are
Use opposite rudder to catch wing drop
?
Use of Ailerons may cause wing drop.
This is the heart of my original question; where does an authoritative document say this? It is a design requirement for certified aircraft that "normal" [co-ordinated] use of the controls are applied for control of roll up to the point of the stall. It is
not a design requirement that rudder be used, or be able to be used, to the exclusion of the ailerons, to controll roll up to the stall.
During a recent flight with a flying instructor in my C-150, I demonstrated that rudder (and I have the taller rudder, later model fin) is not adequate to arrest or recover a roll off of more than 10 degrees during the approach to a stall. She seemed suprized, and I felt her checking to see that I did have full rudder applied - I did, and it was still rolling off uncontrollably, with my holding the ailerons rigidly neutral.