Fireflybob,
A320 is only 'trajectory stable' in normal and alternate law(pitch only). In direct law and mechanical back up there is most definately a pitch/power couple.
Manual approaches are permitted both with or without ATHR. Airmanship should dictate the level of automation that is used!
Basic theory of operation in normal law:
Sidestick movement in the pitch axis commands a change in ‘g’. Zero displacement is the command for 1g (i.e. no change in flight path). Once the correct flight path is established, it will be maintained regardless of speed/thrust changes and hence there is no need to trim.
Sidestick movement in the roll axis commands a given roll rate. Zero sidestick displacement is the command for zero roll rate.
When handling in normal law, resist the temptation to overcontrol. Make small inputs to the sidestick and then release to neutral. Unless an adjustment to the flight path is required, sidestick inputs are not required
Last edited by Firm Touchdown; 14th Jul 2004 at 00:52.