Originally Posted by
Lyman
Does a/p fly attitude, airspeed, or load... Hands off, what does the a/c fly in AL2? What rate?
Autopilot "flies" flightpath, constantly correcting itself if deviation is detected (see the "zipper" trace you were interested in earlier). In Alternate 2, the aircraft holds commanded flightpath in pitch and is roll direct.
The discrepancy in the A320 being talked about is something on the order of 1 foot every 20 minutes, depending on external conditions.
What do you devine is "unusual command response"? You have a source?
You've lost me - where did I use the phrase "unusual command response"?