EXPO, Dual rates, End Point Adjustment does not slow down a servo. They change how far it moves compared to the stick movement.

EXPO, is a ratio where the amount you move the stick close to center is reduced yet gives full throw when you move the stick as far as it will go. EXPO will soften the how the plane feels with small movements of the stick around center stick position out to about half stick travel. Give or take depending on how much expo you use.

End Point limits how far the servo moves. If you get say 1/2 inch of surface movement, you can set it so the servo only moves it 1/4 by changing the end point.

Dual rates at full rate the servo will move the surface 1/2 inch, then you flip the switch and the servo only moves the surface 1/4 inch.


I am sure there are better explanations out there, but this should give you a very basic idea of what EXPO, EPA and Dual Rates are.


Dru.