I would start by setting up the elevators for the maximum mechanical travel it can yield. Including *****g out the servo endpoint travel on the radio. Now comes the trial and error. Dial back your settings to start. A simple test is a loop, observe, increase the throws and loop again. As you progress you will achieve tighter and tighter loops. It will reach a point where the plane will fall out in a loop, usually to the side. You have now found the limit of elevator throw for that particular model for flight. Speed is a factor as well. For a hover the deflection can be much greater as compared to flying. Triple rates on a radio was made for this aspect. Low and medium settings for flying and high rates for 3D. Hope this helps and good luck, Joe