Wing Fences
Here's something else you might think about... I have a 120-size Yellow Cap 232 that's just been hairball for the last two years; I put endplates on the wings and that helped considerably. Still would snap occasionally, though. Out of desparation, and from a fellow club member's suggestion, I reflexed the outboard 4" of the ailerons up about 1/8" and it completely changed the airplane. It is essentially adding washout to the wings. I just slicedthe ailerons, moved them up, glued them, and recovered. I did this about a week ago and I haven't been able to get the plane to snap at all (unintentionally); I can fly at half the speed with twice the elevator input. Still does tight outside loops without snapping out, too. I was planning on replacing this plane, now I'm having so much fun with it I'll keep it! (And save a bunch of money, too).