Find someone that fly's regular and let them see if they can figure it out for you, it's really hard to imagine what is really happening and if someone (that knows) sees it they might be able to help. One thing I can think of to check is for is a warped wing. Probably not that but it won't cost anything to check. I will also go along with your statement that you are possibly stalling the plane, try just letting the plane climb very gradual. Most new people worry about getting a plane up too fast and that can cause all kinds of problems, especially stalls. Not being Smart, but are you sure your controls are RIGHT ??? Probably not much help, hope you find it before it's too late. ENJOY !!!!! RED