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Always suspected that the wing panels on the H9 Camel were twisted, and not anywhere near equal incidence left to right. Got real bored this winter, put the Camel together, and hauled out my helicopter digital pitch gauge, which makes a great incidence measuring device. Results: right hand panels both hand more incidence than the left ones. That's why this bird has always fought right turns, and needed almost half an inch of right aileron trim to fly in a straight line.
You know those little fiberglass adapters that come with APC electric props? I used a bunch of them to shim the panels, putting them between the panel and the ends of the cabane and inter wing struts. Everything is pretty close to identical, now, with a little bit more incidence on the left panels, which is what this thing needs with all the torque from that G60 motor and the 17" prop.
The pictures show it better than I can describe it
Anyway, she'll get tested this spring. I've become so fed up with the squirrelyness of this aircraft that if this doesn't correct it, it'll be going up for sale, and I'll build a BUSA Spad XIII. I have a BUSA DR-1, and it flies 10 times better than the Camel.