Throttle and pitch curve.What the heck

[rspfarrier]

I've been in this heli hobby for about 3 months now and most of the settings adjustments,etc I understand but I'm still clueless about these, :bomb: like what to adjust and why. I have been flying my T-Rexx and my Venture 30 (or should I say hovering)for some time with no problems. But I do want to learn all there is to helis so is the reason for this one perticular question. Some of the material from the books I read don't seem to get into the subject of throttle and pitch curve to deep. Thanks, Rob

[Ivan]

You need to balance the throttle curve against the pitch curve. More pitch in the blades requires more power. The only place this changes is at full throttle, when you get to full throttle, you set the pitch so the engine doesn't bog on a full power vertical ascent.

Now, here is my suggestion, on a pitch curve. always make it a straight line. if you don't have a radio that shows a graphical representation, plot it out on graph paper, and set your pitch curve points that way. If the pitch curve is a straight line, then you won't have any sensitivity issues. Here is what I mean. If you set your throttle curve to have -6 at the low end, +5 at mid stick, and +10 at full stick, then your pitch is moving through 11 degrees total from low stick to mid stick, and only 5 degrees from hid to high. Therefore, below midstick will be much more sensitive and make the heli tricky when you start learning decents. If you wanted a -6 low end, and a +10 high end, then the mid setting would be +2 (right in the middle) and you would end up hovering at a bit above mid stick, which is not really a problem at all, since most guys that fly aerobatics hover at 3/4 stick anyhow. Having a straight line pitch curve makes the heli feel the same all through the collective range.

Once you have your pitch curve set, then set your throttle curve to maintain rotor rpm, and you will be set.

[rspfarrier]

Now that's something I can understand. I am using a JR 8103 so I'll be able to plot the curve graph as you mentioned. Thanks for that very informitive reply :glasses2:

[Ivan]

no problem. I am glad it all came out sommthly. :mrgreen:

Another item I forgot to mention, it is beneficial to set your heli up with a good "square" mechanical setup. Meaning that you have a -10 0 +10 pitch curve with everything in the radio set at full travels and a full pitch curve. make sure everything is at right angles or centered (aka Shannons setup vids) at mid stick. Then it is much easier to set your learning pitch curves in your transmitter, because you know that 25% on the transmitter equals -5º, and 50% equals 0º, etc.
I hope this is as understandable as well....