MB, 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.
180 deg is the way you move on the swing set if you will hold the swing-amplitude, if you will stopp you try to move in 90 deg (or 270 ???)
if I put together HNīs vertical wind velocity and the roll altitude, then both cange with the same frequency of 1/3 Hz
we do not know much about the turbulent air in this case, but it is truly not one uniform mass which moves up and down, it might be that it was one vortex with the dimension d +/- 800m...... if they flew cross through it, the vertical wind velocity is explicable...
but what will be if they flew alongside of some vortex with this dimension and this frequency? changing different AoAs at both wings with 1/3 Hz..... VIO
the PF did not beginn with this oscillation, with the stick he just helped to hold the roll-amplitude.... (and forgot to control the pitch....)
