I've been trying to perfect my plane building and feel as though I'm getting better, but my planes all seem to start rolling as the control surfaces reach their maximum angles. Haven't been able to figure it out myself, if someone could check either of the HSW planes uploaded with in the last 2 days and give me some feedback, I'd appreciate it.
It's because your plane is exceeding it's maximum angle of attack. The rotators moving the entire tail wing is creating enough force to make the plane fly at an unstable angle. You can fix this by moving the CoM and the CoL closer together. Doing that will make it more maneuverable, but also could make it so maneuverable that it goes into spins instead. Another option is making the tail wings smaller or giving the rotators less degrees of movement