ORIGINAL: combatpigg
I would rebuild the aileron so it is stiffer and would definitely sheet it, maybe even with 1/64" ply on 1 side. Make sure the torque rod is well inbedded in hardened wood. I like to use epoxy "bearings" for torque rods instead of using tubing now for the least slop possible.
I think having control surfaces that are thicker than the wing would increase buffeting? Seems counter-intuitive.
Decreasing surface area of the flap is obviously going to help, I would look at other planes in your class and see what they get away with for roll control.
Funny how you helped me out of a flutter problem 2 years ago with my Nelson powered delta, that model is still with "the living", needs to be exercized soon.
Hi CP
There is no torque rod, it's a servo per wing.
On the Diamond Dust I was told by Jeff the inventor to leave the elevon thicker because it will flutter if it matches the TE of the wing, I had mentioned to him I wanted to match the lead off on the wing. I never would have thunk it.
I'm thinking off adding an oz. of weight under the aileron near the tip. I that doesn't work, cut it down.
There have been some strange plane losses, maybe this is happening to others too and the don't know it. There’s usually not much left to do autopsy on when the plane goes in at speed.[:@]
I don't recall what I said that helped you.