Originally posted by rcFp
regarding control surfaces movement i'm trying to solve extra or less control surfaces movements by moving pushrod location on both horn and servo arm sides
my Q are :
1) is it the correct way to do it or should i leave both sides on their out most location and make radio ATV adjustment.
Best setup is MAX ATV or End-point at TX, as short a control arm as will provide the desired surface deflection. Generally were limited to an absolute minimum with regard to control horns, this is measured from the hinge center line to the control horn pivot point. Always maintain at least a 1:1 ratio between both arms, preferably a mechanical advantage would be present (smaller servo arm than control arm).
2) if not what is the right location to move the pushrod (horn or servo side) and what is the effect (can i reduce output toque to a risky level )
What I would first move would be dependent on the problem in front of me. Binding would lead me to shorten the servo arm. Inadequate throw or deflection would bring my attention to the control arm first, but I would first have to consider the overall length of the control arm from hinge center line to pivot point. If it's possible I would shorten this first, keeping in mind I want a mechanical advantage. As a secondary consideration I would lenghten the servo arm.
You cannot ever reduce the servos rated TORQUE this is a fixed value. You can reduce the FORCE by lengthening or shortening the servo arm.