What weight Sevenstrand wire for pull-pull system?
 

Setting up a pull-pull on US120. I have lots nlyon coated Sevenstrand wire fishing leader and crimps in various sizes.

12#, 18#, 30# and on up rated breaking strengths.

Fixed data:
Rudder area 42.8 s.i.
Servo rated 44.4 oz./in
Servo arm DuBro large Control horns Wh H-Duty
Eng. 31 Ryobi

Questions:
1) how much of a load can be generated on that size surface area doing aerobatics?
2) I visualize the servo being able to pull 44 Oz at the end of a 1" servo arm. I do not understand just how the servo holds the load? For example if the rudder were deflected 3" (at bottom) under light resistance and control was held and the load increased with airflow, what happens as that load exceeds 44 oz of torque? Does the servo give up and allow rotation or does it hold and just pull more amps until load is reduced?
3) Is there a general rule for safety that the control linkage should exceed the max load by a given factor? If so what is the factor.
4) What is the working load on those tiny pins in the clevis?

Thanks for the assist.

What weight Sevenstrand wire for pull-pull system?
 

I[ve been doing this for years and have used anything from 30# test to 60# test and have never had a failure yet.