ORIGINAL: skiman762
I ran across an intresting experiment, these guys built a test platform that they mounted on the mirror bracket of a pickup to test how much force was required to move a flight control
it had a deflection gauge and a scale hooked to the control horn they drove down a runway at speed up to 80mph I was suprised at how little force was reqired to hold it at 45 degrees I wish I had saved it
can't recall the numbers bit it was way less then what you hear people say you need
The holding force is always less than the moving force required to deflect the control surface from neutral to 45* against a strong airflow resisting the control surface movement. Especially as the servo is attempting to do this deflection as quickly as possible in obedience to a sudden control stick command for full 45* deflection. At full deflection command with the control stick rapidly moved to max deflection command, the servo is probably experiencing a very high moving torque load. Much higher than a holding torque load.
