Originally Posted by Wildflyer
I hope that makes sense.
Yes Sir it does, thank you.
I am using digital servos on a new 3D Plane. The servos come factory set to +/- 60 degrees (120 total) nand can go a full 180. The plane, an Extreme Flight Edge Demonstrator control surfaces will travel +/- 45 degrees.
My initial thought was 1:1 ratio and limit servo travel to +/- 45 degrees. Second thought for maximum mechanical leverage was set the servo range to +/- 60 and use 1.5:1 ratio. I gain Leverage but the trade off is Speed.
Anyway what had me questioning my logic is why I kept reading to use the holes farthest away from the Servo and Control Horns you can get. That did not make sense to me because doing so on the Servo Arm would mean you loose leverage or torque.
So now from your explanation I understand why the authors said that. It also explains why 3D planes need fast and strong servos because some models I have seen require some insane throws of +/- 160 degrees and that would require a ratio of less than 1:1 something like .75:1