Richard L.: This may not be the most appropriate place for this but, I am having a problem with my GP Stuka and you seem to know your stuff so, I'm asking my question of you.

More specifically, I am having a problem with the aileron servos. When I set one side to the specs, the other side is way off and when I switch sides and set the other side to the specs, the other side goes out. The servos are connected to a Y-harness. Each servo seems to be capable of performing reliably within the specs but, not together at the same time. I used both new Futaba 3004 servos and I have moved the pushrods on the different hole settings on both the control horns on the servo and the wing to attempt to fix this but, to no avail. I used CA to glue the servos in the wings instead of the servo tape that they supplied otherwise, I would just pull out the servos and check for a servo problem. It seems that no matter what side is out the servo goes way farther up and not enough down to come close to the 3/4 specs reccomended by the manual for low rates. I use a Futaba 9c tx with the new Futaba module installed that allows for channel changing. The receiver is a Futaba 127DF FM receiver. All other servos are also Futaba 3004's.

I have never had this problem on any other plane before. Usually when one aileron servo is correct, they are both ok and if not, simply adjusting the throw in the tx or changing the position of the servo horn and/or pushrod will take care of it. I have not had any problems with the flaps. They each move the same amount when deployed and work well.

Do you think this is a servo problem fixable without removing the servo(s) or maybe a tx programming setting that I may have overlooked?

Thanks,
Bob Proulx