ORIGINAL: Jack211
I know what you mean about the flexibility of the elevator. I FIRST thought maybe the control wire was bending--hence the carbon fiber idea. I suspect the reason the U Can Dos have TWO servos, each driving a separate side of the elevator, was designed to prevent that snap problem. I've been thinking of a dual drive system that goes THROUGH the fuse to drive both elevators with the same servo.
J.
I was worried about the control wires being so small, so when I built this one, I slid carbon fiber tubing over them and glued them in place to keep the wires from flexing. I just went out to the shop and looked at the elevator rod and the carbon fiber is cracked the full length. So...I guess I'll be replacing that this week. My Harmon Rocket has dual elevator servos, and I do not see the same problem, however it is not nearly as acrobatic as the twist. Nowhere near the amount of control surface or throws. I too thought about the dual elevator servos. With the saito 82 weight up front I could probably do it pretty easy, but I'm still seriously considering the OS .61 which you and Down have been speaking so highly of. Could it still balance with the OS and an additional servo in the tail?
Also, what prop are you all using on your OS .61?