Machinbird, after taking a second look at grity's graph, and assuming that the data contained therein is correct; I make this conclusion - Something is lying to us.
The graph shows an initial move out of center, followed by three complete left/right reversals including two up/down movements in 11 seconds. That amount of movement in that time frame is IMO almost impossible based upon my time spent handling the A320 SS. In other words, the Bus SS is not a cheap video gamer's joystick. The spring loading and damping would make that amount of movement quite difficult.
Secondly, that amount of movement would be on a scale never before ordered by the PF prior in his career. If I have followed the timeline correctly, the aircraft was relatively stable when the a/p and a/t dropped off line. This graph indicates that the PF began this series of SS movements within two seconds of a/p a/t disconnect. The aircraft does not appear to have been in an upset at that time, so what caused the PF to almost immediately begin a series of spastic SS movements? These movements are not compatible with normal hand flown inputs.
We are left with resolving a series of over exaggerated control inputs with a relatively stable aircraft. Either the data is corrupt, or the PF made completely inappropriate control inputs, almost impossible control inputs. ...........OR, the PF was just hanging on. Or, the aircraft was upset more than I realized from reading the data.
Regarding control strategies, I find that small deflections, held for longer time spans work better than short higher magnitude deflections.
FWIW, the 320 requires very minor control inputs when flown a/p, a/t, f/d's off.
Last edited by TTex600; 27th November 2011 at 17:16.
Reason: Added another OR