Nope!
Actually it's pretty effective as rudders go. It just kicks the tail out in the desired direction. Of course I am only really using at takeoff and landing to point it where I want to go. Otherwise it's bank and yank like the rest of us.[8D]

Maybe mix isn't the proper term. I have two servos for the elevator and the rudder works them also. Otherwise I mix balsa, fiberglass, and dirt.[sm=bananahead.gif]