Originally Posted by
BDAttitude
From this excerpt it seems that there were two discrete actuators for autopilot and for electric manual (hence the need for two cut out switches).
This would also suggest that there could be two electric motors fighting each other when AP and manual el. trim are applied the same time?
Which one would succeed? I would also expect the rate switch to have some impact on available torque. So the outcome may be dependent on AC configuration.
There is only one stab trim motor on the 737.
Yoke trim wil outvote A/P trim.