There is another issue that bring this phenomena. One wing "stall"... so, try to put airfoil to semi-simmetric if was simmetric, or flat bottom if was semi-simmetric. And arrange airfoil of orizontal tailplanes for balance all.

I also encountered this on my MiG-21. It happens when the CoM is on one level with the CoL and too close to it or generally when the CoM is above the CoL. Something similar happens to real aircraft, that's why you either put the CoM lower than CoL (for stable aircrafts like cargo or passenger planes) or above the CoL (on some fighters for increased maneuverability and less stability, but that needs a flight computer to stay controllable). The same goes with placing the CoM infront or behind the CoL. In SimplePlane it's the best to place the CoM atleast slightly below and infront of the CoL, as we don't have an advanced flight computer to make anything else stable and also the AI can't handle it. :)

@Skua all right then. Thanks for the help.

@GINGER01 I'll forget and/or lose it if you send it just now haha. Post a link on one of my planes on Sunday and I'll get on it

@Skua no problem. You came through for me many times I can wait. Do you want me to send you the nose so you can get the general characteristics?

@GINGER01 I can't build things this weekend, but if you don't mind waiting a couple of days, I can do it

@Skua I know that you xml edit and I was wondering if you could make the nose turret on the B-17g because I am not able to get two "guns" on it. I use very small width on the fuselage block. I would love it to work as well if possible.

I found that when my pitch controls were too big it did this. There isn't enough horizontal stablizer surface left when your pitch control surface takes up most of the stabilizer. If that makes any sense.

Ok I figured it out, I literally removed the 2nd part of the wing and re-attached it. I also did the same with a wing cannon. (It's the RFW SABRE)@Skua @Meawk

If you link it I can take a look

This is normally down to one of two things: your pitch control surfaces are too big, or you xml edited some wings and something got inverted when it shouldn't have been. There is one other potential culprit, which is the wing landing gear. For some reason, when it's retracted, it can cause a persistent roll to the left

happens to me too. don't know how to fix, but im sure @DeezDucks knows though.