Hi Ben -Well, I sure am not figuring this out. After receiving your message, I went back to try it again. The last several times (not just once) the A/P was completely kaflooy on the DC-3. Not other aircraft. But the DC-3 was just wacko - with wild developing swings in attitude that completely de-stabilized the aircraft. And in my searching I found a number of similar reports on other forums.
Now, tonight, it behaves itself admirably. In fact, I can't get it to duplicate the weirdnesses I have become accustomed to experiencing.
I haven't changed anything. I tried several different realism settings, and I'm OK on all of them. I tried auto-rudder or not - it makes no significant difference. I usually fly with "real" weather - maybe that is a factor, although we have not had any major weather shifts in NE recently (keep an eye on Isabell, though. could be fun ahead!)
So I don't really understand. I have no peripherals, other than a joystick and a printer, and they haven't changed. I didn't re-install or delete anything. But I also didn't hallucinate the problems I was experiencing - or imagine the posts I read about from others who ran into the same thing. So - I really don't know what's going on. Maybe somebody else does.
Meanwhile . . .
William