I'm not at home at the moment but I believe the 3 position switch above the right hand stick controls the flaps, at least it does on the Parkzone P47 and Stinson Reliant models. My problem was when I calibrated I didn't start off with this switch in the full down position. I recalibrated starting with it down and then when it came to the screen to try out all the switches, it then worked properly per the response bars on the screen. Using a 9303.