For any AFCS (in the broader sense of the word), to work, the Force Trim must be on, or the actuator will move the cyclic in the cockpit instead of the mechanics downstream to the rotor head.
Dunno about that. You can fly the 61 beeper trim on or off and AFCS still works. Same on the 76A.
And if you really want to see a goofy attitude retention system try the 214ST - truly bizarre.
Last edited by oleary; 27th Jul 2014 at 01:34.