Pitch curves - RCCanada - Canada Radio Controlled Hobby Forum
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Old 03-21-2009, 11:58 AM   #1
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I am: Wes Quist
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Pitch curves

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Hey guys, I`m starting to get into 3D with my Trex 450 Se

I know there has been lots of descussion on Pitch curves.
I`m starting off with only normal and Idle up 1.
I`m using a Futaba 7chp (5 point curve)
I`m having some issues setting up the points under mid stick. I have to really drop the stick to bring the heli into a inverted hover but if I adjust the point up i feel the heli is to responsive (touchy). I have also adjusted the throttle curve to counter act the `to touchy` feeling.

What are you guys runing for values, And ideas would be awesome. I`m so close to figguring this out. But just unsure on the fine details.

Thanks guys

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Old 03-21-2009, 01:05 PM   #2
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Re: Pitch curves

You should definitely keep your pitch curve linear and slightly adjust your throttle curve. Using a governor would eliminate this phenomen.

When hovering upright the heli body acts like a pendulum. It helps to stabilize the hover. However, flip it upside down, and suddenly the pendulum weight is on top. So the heli would want to fall off to one side. This is why you say it gets twitchy. This is something you have to learn to deal with.

I think I run 100-95-90-95-100 on throttle and 0-25-50-75-100 (-10 - +10) on pitch. Can't remember exactly. It has been a while since I checked.


Edit: messed up my pitch curve example

Last edited by Jeremy300; 03-21-2009 at 02:59 PM.
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Old 03-21-2009, 02:32 PM   #3
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Re: Pitch curves


Very well said Jeremy. Linear is a key word.
Graph format example here http://www.swift-tuning.com/curves.php

Then adjust according to your power setup ... gearing and loading
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