What is the best way to get rid of it. I added spoilerons, but maybe not enough, I did add some tail weight, but it might not be far back engouh. If you can harrier in a UCD what is your setup?

I use snap spoilerons about 80% and have no wing rock...I try to not use any aileron at all and just rudder to steer

you might want to check lateral balance if you haven't.

Check both wing panels for weight and see if you need to add an once here or there to one of the wings, that will make a very big difference.

Yeah the lateral balance is off a good amount. I will add weight in the wings and try it again.

I balanced it laterally and I still had wing rock pretty bad. It helped a little, but I also had a little mishap. As weird as it might sound, I stalled it on landing and now I have to rebuild the nose of the airplane. I never even did that with my cap. I think It is really not my month in RC so I will repair it and hope that in august that I am a little luckier.

I couldn't harrier the UCD last year but after practicing with a SPAD, some foamies, and a Mini 3D (which is a no-brainer in harrier) the UCD now magically harriers

I use 50-70% spoileron. It's all about finding the sweet spot and keeping it there. Slowly burry the elevator (45-60deg) while adding a few clicks of throttle. The prop wash really helps get the plane through the stall.

Or do a parachute. Nose down at idle, pop in full elevator, flick on the spoilerons, add a few clicks of throttle to stabilize the plane in a nice elevator, a few more clicks and you have the harrier.

Not the easiest plane to harrier, you can get "out of shape" quick.

The best way to prevent wing rock on your UCD........sell the UCD.

Sorry but you did ask for the best way to get rid of wing rock.

But alternatively you can cut the wing tips off and that will help tremendoulsy. I cut the wingtips off my Flip and it was then able to harrier and elevator with much much less wing rock. My buddy them tried the same mods with his UCD and had the very same success. But I still say the best way is to get rid of it

It seems to me that wing rock is generally a stall on the tips. If that is the case then cutting the tips off will improve it because it will add a thicker wing at the tip. I would also assume that Tip stalling plates will also help some degree.

Why would spoilerons work? It seems they create more wing area and a nose down moment. Also The Mini 3D looks like it has about the same design as the UCD wing, why is the mini 3d able to do harriers better?