Ok, just finishing up my GP Pitts, it took me awhile to get back to working on it after I recovered from my depression when the Christen Eagle came out just after I bought this one. I've got an OS FF-320 in it, can't wait to hear it run. One thought I have is why GP calls this an S-2 when it is actually an S-1, oh well, irrelevant.

Ok two things, I put the wing on it, to start working on the aileron hook ups. I went with two servos and am using the control rod connection method. When I operate the ailerons, I get wing warpage at the last portion of the throw. I am thinking that I do not have the connection in the right place for the control rod and it is putting incorrect torque on the wing. I need to know if anyone has used this method, and where you hooked up the control rod on the ailerons.

Second, I adjusted the rudder, elevator, throttle, and all went well. When I started using the ailerons today, as I would use them, I would get jittering in the system, inconsistent movement. It was worse at first, then it mellowed out a little bit, any ideas what would cause this? The radio and rx are brand new, never been used. Futaba PCM.

Fatboydrvr, where did you route the rcvr ant.?? If its in the tube running through the fuse., this could be your problem. I initially had my ant. inside the fuse. and had the same problems. Routed the ant. out the side and back to the tip of the horz. stab and no more glitching. As for the warping the only thing I can think of is that your ailerons are jamming towards the end of the deflection. Check and make sure the ailerons move freely and easily up and down.

Steve

I would sure turn my attention to the aileron setup as both of your issues relate to
that part of the control system. If you have the struts connected and you're getting
wing warpage then you are putting one heck of a load on the control system. One
possibility is that you're pulling the voltage low enough by stalling the servo to affect
radio operation and causing the jitters. If your antenna position was causing a problem
it would do it all the time and not just when you operated the ailerons. I'm using two
servos with linkage to drive the uppers also and have no problems. The linkage should
run from as close as you can get to the trailing edge on both surfaces. This provides
the best geometry to prevent flutter in the upper aileron. The attachment point should
be equal distance from the hinge lines as well to prevent differential movement between
the upper and lower ailerons. If the geometry of the pushrods is correct, it sure sounds
like you have have an upper aileron that is binding or limited in travel as compared to
the lower. Whatever you do, find and fix this problem before you try flying it.

well, the wing warpage was due to the stress from the way the control rods were mounted. Fixed. Now turning my attention to the glitching, even with the servos only operating one servo (control rods unhooked), the servos glitch. The aileron servos are the only ones that due the glitching. Would the length of the extensions, and then the additional length of the "Y" connector have anthing to do with this? I am going to try the antanae next, it just surprises me that it would be the ant. when no other servos glitch. Would like to hear about how others have run their antanae also.