I am getting a lot of wing rock with may DP extra win I try to do a harrier. how can I stop this, I might have a few problems with my plane it does not put out more thrust than its weight do to my high elevation my CG is a tad forward. I cant think of eney other problems except for the use of spiolerons.

Hi lcgj

I think you've answered your own question - move the CG back and use spoilerons! Also some planes do inverted with less wing rock than upright, yours might be one of them.

Andy

I have a 40% FC Extra 330.

I had a severe wing rock problem in upright high alpha harriers.
You could not keep the wings from rocking.

I added4 ounces of weight to the tail and the wings stabilized.
Amazing! such a small little CG adjustment cured the wing rock.
I added more weight and the only difference I noticed was that waterfals became tighter.

Now that the wing rocking was cured, the plane still did not want to descend in a harrier because of the light wing loading.
Andy Kane programmed my radio for up reflexed ailerons when I hold down the "snap-roll" button and it cured that problem.
With the "spoilerons" up the plane would descend almost straight down.

So, I would say to move CG back and add spoilerons.

Barry Finck
Grantville, PA