Correct aileron servo holes (Skywalker)

[FPVSteve]

Hi,

I've noticed on my Skywalker that I have an issue with my ailerons and it's causing noticeable handling issues when turning (and may be the source of my autopilot problems).

Basically, if I turn left (as an example), the left aileron comes UP and the right one DOWN .. all good. But the left one doesn't seem to have as much throw as the right one so what actually happens is, the plane does turn left, but it appears to drag to the right - I believe this is called adverse yaw? I have to use rudder to coordinate the turn (I actually use a mix of 20% rudder to 100% of aileron) but the autopilot can't/won't. This results in the problem of it not being able to maintain heading properly (and sometimes the circles it does in RTH are so large it might as well not bother :laugh: ) - especially in wind!

So my question is (on the basis that I am using a Y lead for my ailerons as opposed to individual channels), what is the best way to stop this from happening?

Right now my servos are set up as follows. FURTHEST hole on the servo arm. NEAREST hole on the control horn.

Thanks!

[FPVSteve]

Found these useful videos

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[Dizzy]

Hi Steve years back we had this discussion at a local club meet I think the conclusion put forward if I remember correctly was that with the correct servo horn installation there would be more up than down which would reduce drag and therefore reduce yaw.
If I,m wrong I do apologise  it may even be the other way around.

The one thing I do remember was when correct it really improves handling hugely.

I do have this info in a model aircraft book here somewhere I will have a look for you.

Dizzy :)

[FPVSteve]

Mine was exactly the opposite and flying like a dog!

With more UP, you get the drag on the wing you're turning into (to help turn the aircraft around) .. mine was the opposite, more down on the other wing which caused more drag, essentially causing the aircraft to turn on its axis, but yaw in the other direction...

I've corrected that now but not had a chance to fly her yet.

[rob.thomson]

Hi Steve years back we had this discussion at a local club meet I think the conclusion put forward if I remember correctly was that with the correct servo horn installation there would be more up than down which would reduce drag and therefore reduce yaw.
If I,m wrong I do apologise  it may even be the other way around.

The one thing I do remember was when correct it really improves handling hugely.

I do have this info in a model aircraft book here somewhere I will have a look for you.

Dizzy :)

Correct.

Simple aileron differential.   

You generally want around 20% more up than down.