Originally Posted by
deltahotel
Denti. Yes, like the 75/76 which will work with 2 or 3 autopilots. I have no 737 experience so always good to improve breadth/depth of knowledge.
The point I was trying to make to help the OP (obviously not well enough) is that a lot of ac won’t do all the rudder work for you (on my ac none of it until 1500’ on approach) so the pilots need to sort that out themselves before presenting a well trimmed ac to the AP.
HtH
Always good to get a different perspective. Although, the A320, the aircraft the OP was asking for, actually uses the rudder servo throughout its flight envelope when on autopilot. Still need to trim it out first if in a high power situation (like the usual V1 cut), but once trimmed, engage the autopilot and that takes care of (nearly) everything.
That said, the funny thing about the 737NG fail operational (most are fail passive) is that it gives a LAND 3 indication with just two autopilots, and even in single engine flight.