Thanks Chad.

I think I have a working model at this point. You were certianly right though, as far as the pivot point location. A little left, right, up or down make a big difference. If the Spitty is much different than this I would enjoy seeing it.

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I think the hardest part now is shaping the leading edge. Then transferingthe pivot point location to the real aileron. It's about an 18'' long aileron.

I'm also a little concerned that at the full up deflection there is 3/8" x 18" exposure sticking down which is the equivalent of a 5-6 sq/in slab of wood stuck up under the wing. That seems like a huge amount of drag. I know that the intent of the freise aileron, but it does seem a lot.