ORIGINAL: rcairflr
I don't have a JR11X radio, so I can't help with that. But the first thing I would check is the the distance from the center of the hinge line to each servo arm. The distance should be the same and should be the same as the length of the servo arm (1-1), a lot of
people think the measurement is taken from the wing skin to the servo arm
This makes no sense, on a Comp ARF the hinge is only about .010 thick so one really can't measure the center. And I'm pretty sure you meant control horn and not servo arm. On all the Comp ARF airplanes I have set up I have measured from the inside wing skin at the hinge line. The horns must be same length from the inside wing skin and preferably have the ball link center directly over the hingeline. Usually this gives you about 2" from hinge to ball link and the use of a 1.5" or even a 1.25" servo arm will give you plenty of throw while maintaining good mechanical avantage.