ORIGINAL: CoosBayLumber
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.
Step 1. Draw an arc that depicts the servo disk or the aileron control arm showing the servo center point. Differential can be created at either or both points.
Step 2. Measure the distance of the servo movement or aileron control arm movement with the normal servo throw and lay that out on a translucent vellum using the same arc used in step 1. Be sure to mark the servo center point on the arc.
Step 3. Next overlay the vellum over the step one drawing.
Step 4. Determine how much differential you want by rotating the velum. The further the vellum is rotated the more differential is created.
Step 5. Measure the distance the push rod will travel by using the vellum end points.
Step 6. The vellum servo center point becomes the point to attach the aileron linkage.
Pretty simple! I have no clue why they invented radios that can do this with programming when it is more fun to do it with linkage.
Or for less fun use the calculations in the chart in the next post!