RE: U Can Do 3D
Here is the sequence of rudder mods. First pic is stock, second pic is the first mod, third pic is the second mod and fourth is final. First was a little off the top, Second was removal from the top of the trailing edge, resulting in a tapered effect. The final mod was the addition of some stock to the top, trailing edge which angled the top edge up to the rear. Also the trailing edge received more area at the bottom, enhancing the taper to the back. With the slight additions to the last mod I noticed that less rudder was required for KE. The small amount made a noticeable difference. Again, all this did was stop the way it would drop opposite wing when rudder is applied. It had no effect on the way it dives to the wheels. As some will point out, it could have been done with a radio mix. This is just the way that I chose to approach it.
On harriers you can mix in a little up reflex on the ailerons, slaved to the elevator. I've also read that you can tape two sections of wooden dowel to the top of each wing, about 2 inches back from the leading edge, which, reportedly, ensures that the top of the wing fully stalls by breaking up the air flow. The way that I read it is that the wing rock is due to the wing being caught between lift and stall. Joe