Torque is torque, it does not matter about the length.


If a servo produces say 100 ounce-inches at stall, then on the end of a 1 inch arm, it can produce a 100 ounce pull.

100 ounces*1 inch moment arm = 100 ounce-inches


With a 2 inch arm, it can produce a 50 ounce pull:

50 ounces*2 inch moment arm = 100 ounce-inches


with 1/2 inch arm, it can produce a 200 ounce pull:

200 ounce*.5 inch arm = 100 ounce-inches


The issue of arm length and ATV is resolution, you want to have the servo moving over as much of its travel as possible to minimize slop and increase resolution.

Mark