Diferential aileron needs

There used to be a formula or diagram on the net as how to make a standard servo throw to one direction more than the other, but using the entire angular swing.

If the servo arm/disk were rotated 45 degrees each way from neutral, there is supposedly a way to make the movement about 85 percent/115 percent at the aileron. This was using either an angular torque rod on the aileron, or some offset position for the pivot on the servo. Want to do this diferential movement the old fashioned way instead of using a special setting on the transmitter.

Someone had a series of diagrams and formulae posted last year. Now where is that?


Wm.