Hi Carsten

I have done some more flying with my UL and I am very happy with the setup so as promised here is how mine is setup. The radio is a 14Mz so if you are using JR then swap the expo settings.

CG

With UAT full and empty tanks. I am balancing exactly on the middle of the wing tube, with the wings off.

Ailerons

I am using 29mm down, 27mm up with -45% expo. measurements are taken at the aileron root (i.e from the centre of the flap when its up) to the centre of the aileron.

Flap

Take off flap is 21mm, landing flap is 90mm, Measurements are taken from the middle of the outboard end of the flap to the middle of the inboard end of the aileron(at neutral of course)

Rudder

55mm each way with -40% expo

Elevator

I have left this last as this is a bit more complicated. Firstly, the neutral point is not with the elevator in line with the tailplane trailing edge. It is about 2 mm up at the outboard end of the elevator. The first photo is my elevator at neutral.

Now with takeoff flap on(21mm as explained above). The elevator needs to go to almost inline with the trailing edge. See second photo. This equates to about 2-3 mm down from the neutral point, measured at the elevator root.

With landing flap(90mm as explained above). The elevator needs to go down another 5 mm, making a total of 7mm. If you now look at the elevator compared to the trailing edge of the tailplane you can see its about 1.5mm/2mm below. See photo 3 for this.

To confirm if you look at photo 4 you can see the pencil line where the neutral point is and the new neutral point with full flap in.

These settings are all with the undercarriage down. Using flight modes I have checked the trim with take off and landing flap but with the undercarriage up. In both cases the amount of down elevator is fractionally less.

As you can see its a significant trim change. If you put the flap out going too fast it does balloon slightly but as soon as the speed is bled off it flies straight and level and it is a real *****cat to land.

As far as the movement goes. Well I have tried three settings switchable on rates

29mm up, 30mm down -45% expo
26mm up, 27mm down -37% expo
24mm up, 25mm down -25% expo

On the first few flights I found the low rate suited me but now I swapped to the high rate as I have moved the CG forward a fraction(as per above measurement).

I hadn't added any mixing for knife edge as there is virtually no roll or pitch coupling.

Geoff.