I have a Sig HERR Engineering Little Something Extra that I converted to electric. It flys just great the way I have it set up. But when I do a loop, it does an 'eight' sided loop. Well, not a round one, but one that seems to straighten out then continue to loop when pulling a loop. I pull on the elevator and the plane starts to go up, slightly straightens out, then continues to loop, then slightly straightens out, and so on until I ease the elevator back to straight level flight.

I have Hitec H55 servo's for just about all controls on this plane. The ailerons work fine, or seem to, but the elevator seem to give me these strange loops. I was thinking it's either the servo (weak) or the control wires are bending and straightening out during 'high G' maneuvers.

Anyone have an idea? I bought a higher torque micro servo as a replacement, but am also thinking that I may have to either replace the control wire or add some sort of strengthening to keep it from flexing?

Ideas?

DS.