Wow that spreadsheet is interesting! How do you approximate what your average airspeed is though? That would be an important factor as to whether or not your servos are up to the task.

OK folks. Been thinking (oh no!!!) about this one last nite.

Just as an example a surface needs 75 oz of torque minimum. Say I have a servo rated at 100 oz/inch. Setup: the rod is connected at 1" on both the servo arm and the control arm maintaining a 1:1 mechanical advantage. I also get a desired surface deflection of 50 degrees with the servo pegged at both endpoints.

Now I move in the attachment points at 3/4" (.75) at both ends for an increased force value of 133 oz/inch (?). Assuming I moved them both exactly the same amount (1:1) the surface deflection should be the same (?).

My question is: why would I use (or not use) one setup over the other? What am I sacrificing in exchange for the extra force in the second setup?