Hi Dave,

The full scale Tiger Moth has a simple one piece rudder bar, pinned in the middle, that is longer than the fuselage is wide and actually protrudes through a slot in the covering on each side of the fuselage. The rudder control cables attach to the bar outside the fuselage.

My 1/4 scale Clark Tiger Moth appears to have the same mechanism until you look inside the cockpit. There is a separate short bar for each side. It is pinned in the middle with a screw and is free to rotate. The outboard end connects to the rudder cables, the inboard end (inside the cockpit ) to the rudder servo pushrod. The rudder servo sits in the center of the fuselage about 3 inches behind the two short rudder bars.

Hope this helps.

Tom