Joystick effect in pitch diminishes, and trim runs away

[JohnCT-4]

Just back after a break, and after about 20 mins flight in the Southern Alps, I found I had very little "pitch up" control. Pitch trim was slowly running away nose down, but attitude was stable until it was about 3 graduations down. I could set it back to neutral, but it kept on creeping away. Then found I had no roll control. Aircraft stable wings level. But rudder pedals worked OK. Nose slewed, but no nose drop in yaw, and no induced roll. I could pitch nose down on the joystick, and then between power change, pitch trim up and joystick well back, get a slow climb set up, but still no roll control. However, both aileron surfaces were moving (visual check), but having no effect on attitude? Only at 4,000' and about 220mph, and no signs of icing!!!. Weird.
I figure if it was the joystick u/s, I wouldn't see the control surfaces move. So it might be something in the flight model. But why after 20 mins or so of flight? Controls worked as usual on pre-flight, and departure and turnout.

All suggestions gratefully received. Cheers John CT-4

[Lewis - A2A]

flight model wouldn't make the joystick input work so it sounds like joystick issues if your trim was moving of its own accord. Ive you've taken a break and gone back to the aircraft i'd check all your controller settings. Make sure no conflicts have crept in.

thanks,
Lewis

[Caldemeyn]

Perhaps you accidentally set the default fs autopilot on by pressing z (if you have is assigned to that function), and you tried to fight it, the spit has it enabled for some reason, you say that when moving the joystick the trim was moving on its own ?

[JohnCT-4]

Thanks all, I think the "Z" issue is probably the cause, since I used shift z or ctl z to get the data up on the FS screen, and probably tried z alone first, without understanding what it did.

So I'll test that out. Thankyou both

JOhn

PS is "z" a toggle, or is there some other control to unengage it?

[Lewis - A2A]

From memory its an on off switch John

[JohnCT-4]

Thanks.
(Joke
Fancy having Spitfire with an Autopilot. Those blokes ferrying them to Malta would have been envious.) JOhn