Have you tried it in fine weather? In the sorts of conditions in the screenshots, I would expect the AP to need to use a rather pronounced angle. I guess it's compensating for whatever the helicopter equivalent of side-slip is...?
26 May 2017 09:15 - 26 May 2017 09:34#34265by timi
Yes, there are two ways to compensate for the side slip. Either you fly perfectly straight aerodynamically speaking showing the smallest possible surface area to the direction of the flight and banking the helicopter to compensate for the tail rotor induced side slip.
Or you fly perfectly level and compensate with the tail rotor therefore introducing the tail boom to the airflow as it's going to be a few degrees off of the direction of the flight. A level flight with a centered slip ball is the mark of this condition.
A centered yaw string is the mark of the former. So in a helicopter those two indicators indeed can mean two different things.