Ben, I used 1.25 inch servo arms, so placed the horn's center at 1" above the center of the hinge line to maintain a good ratio, and full 3D throws.




This dosent seem right to me. with this ratio you are effectivly decreasing the servo's output by 25% and increasing any play in linkage and or geartrain by the same 25%. I would never go more than a 1 to 1 ratio on servo arm to control horn. What I have found ideal for myself is to place the control horn pivot at 1.5" from hinge line and then run a 1.25" servo arm. In most cases this will give you plenty of throw for 3D while maintaining good servo advantage.


Shawn Berkheimer

R/C Blimp Productions.com