Originally Posted by HN39
Originally Posted by Machinbird
The result is that the pilot's control input is out-of-phase with the response of the vehicle, possibly causing a diverging motion.
Is it?
Actually it is very close to 180 out most of the time until he gets it under control but it is converging, not diverging
If you look at the reversal intervals, PF starts out reaching his maximum control input shortly after reaching his roll max angle for a particular oscillation, and he is able to gradually gain on the oscillation so that he is actually leading the oscillation, at which point the amplitude starts to die down, only to have the oscillation flip phases on him. and go through another (smaller) cycle. At least, that is the way I read it.