I have a few questions about the helicopter radio that I will ask in this thread. My radio is the Futaba 9CHP Super and I only started to explore its functions recently.

I have a question regarding the throttle curve and the pitch curve. I understand that the curves shows the relationship between the stick position and the "throttle" and "pitch" respectively. But all I see is a curve, no numbers or values. It's easy to see the stick position on the curve and that's the X-axis, and there is also a vertical line that moves along the X-axis that correspond with the stick when you move it. That way, I know the left end of the X-axis (origin) correspond to the low stick end, and the rightest end of the X-axis correspond with the upper end of the stick position.

But what about the Y-axis? There are no values or anything. If I was looking at a pitch curve, how do I know the pitch value (in DEGREES). The position on the pitch curve is meaningless unless I know what the end point values are. I need to know the pitch that the bottom Y-axis (origin) correspond to, and the pitch the upper Y-axis correspond to (in degrees). I also need to assume the relationship is linear. So if the bottom of the curve correspond to -3 degree, and the upper most of the curve correspond to +10 degree, then I'll assume the mid point is +3.5 degree, IF it's linear, which I'm not sure. Is it?

And how do I know the values that the bottom and top of the Y-axis correspond to? In my example I used -3 and +10, but on the radio there are no numbers. Where do I find this information? Does it have anything to do with servo endpoints?

A little confused.

Thanks.