daven,

I have no quantitative basis for this, but I would guess that you are better off using both ailerons, with less deflection. Since you always turn one way, and don't care about inverted flight, you could optimize by using aileron differential, perhaps. If you do want to use only one aileron, I would be tempted to only build one aileron, and use it up and down. This way you get one wing which is perfectly clean all the time. Of course, you now get a little bit of yaw input from the higher drag on the aileron wing, which will add some drag. Hard to say how you come out ahead. I definitely think that ailerons with more chord and less deflection would give less drag, as was suggested. Probably the most critical is how clean you get the hinge line.

I am in Minnesota as well, south of Minneapolis. Do you race at Grassfield? I am hoping to get up there this coming spring to check out the furious pylon action.

Good luck,

banktoturn