0% expoential is a linear movement of stick and control surface. Negitive exponential requires more movement of the stick near the center position and goes to full at full movment of the stick. A positive exponrntial will give more movement near the enter of the throw. If you are one that tends to be a little harsh on the sticks, some expo is a good thing. I fall into that catagory and I use -50% in both directions on my ailerons. Near the same on the elevator. For the throttle, you can play with it to get a near linear engine response. If you have Expo on your transmitter, it should show a graph of the servo movement.

Here are shots of my Futaba 9CAP Expo screens the first is with 0%. and the line goes up an equal amount as movement.

The second is with -50% and as you can see the servo movement is less per unit of stick movement untill you get to full travle

THe third is with +50% and here the movement is more untill you get to full stick travel.

Just remember, you set each direction individually. You can get some really screwy responses if you don't keep things moving coordinated. I about lost my plane last week because I had screwed up the movement and the results were noting like what I was trying to do.


Don