G'day again

I just went out to my shed and had a look at my plane. I cheated. I used two aileron servos. Sig suggests that using differential ailerons is not necessary so you can fly without it if you wish. If you later want to change to a differential setup, it is only a matter of changing the positions of the pushrod connections on the servo wheel.

As you have only one servo, you need to do it mechanically with the offset method which Sig and Charlie P suggested above because if the torque tubes you were supplied are the same as the ones shown in the instruction manual, the differential is not built into the tubes the way it is in more recent designs. It is not possible to set up differential ailerons with your computer radio and only one servo. In some models, it is relatively easy to put two servos side by side so that each operates one of the ailerons. I did it by putting each servo about half way along the wing on ply plates which I fitted between two wing ribs.

As I mentioned way back when you started building this kit, the Kadet Mk II is a very old design and did not anticipate things like dual aileron setups. When this plane was designed, a four channel radio with servo reversing was very delux. If the user wants to use dual aileron servos, it is up to him how he implements them. I just made up ply plates which I set into the wing about half way along the wings and operated the aileron horns with metal pushrods directly.

To get the differential effect using your computer radio, you need to assign each of the two aileron servos to a separate channel. Most computer radios have a simple way of setting this up. You then use the end points for each servo to get the differential effect.

Mike in Oz