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Home✈️Aircraft🚁Helicoptere-AlignOther › pitch and throttle curves for newbie??
09-06-2006 01:22 PM  14 years ago
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foxman

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stafford uk

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pitch and throttle curves for newbie??
hi
can anyone please give me some recommended pitch and throttle curves for leaning to fly my trex i need some 5 point curves for my optic 6 tx.
hope someone can help me thanks
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09-06-2006 01:31 PM  14 years ago
Grant H

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Madison, WI

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A person cant just give magical curves that will work with every setup. Expecially with pitch curves. Your mechanical setup must be correct before any type of pitch curves will work. Oh and pitch curves are almost always linear, going from 0 to 100.
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09-06-2006 01:45 PM  14 years ago
Boidman (RIP)

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The Home Stretch

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Here are some accumulated ideas:
Here the curves that are working very nicely on my 7CHP for a 450SE with the stock 430L motor, 11t pinion and the 35G ESC (settings 1-2-1-2-3, non-governor mode). These settings depend upon your endpoints being properly setup on channels 1, 2 and 6 to avoid binding.

100 / 75 / 50 / 45 / 40 = Normal Mode & Throttle Hold Mode Pitch curves
100 / 75 / 50 / 25 / 00 = Idle Up 1 & Idle Up 2 Mode Pitch curves
- - - - - - - - - - - - - - - - - - -
100 / 90 / 80 / 50 / 00 = Normal Mode Throttle curve
100 / 90 / 80 / 90 / 100 = Idle Up 1 Mode Throttle curve
100 / 95 / 90 / 95 / 100 = Idle Up 2 Mode Throttle curve

00% = Throttle Hold switch

These curves will give you good performance and smooth transitions between throttle modes, and if you accidentally find yourself inverted while in Normal Mode or Throttle Hold Mode it'll be harder to kill all your headspeed whilst scrambling to find the Idle Up switch or get your skids back underneath you.

PS -- Your Throttle curves may vary somewhat depending on what motor/ESC/battery you're using.
. . . with the 320mm SAB blades and apex 2100 15C li-po's. I have +/- 9 degrees on the blades and it hovers at about 2400rpm. Flies great - see my gallery for some pics of it!
IU1 Throttle
59.0%
76.5%
87.5%
95.5%
100.0%
IU2 Throttle
100.0%
95.0%
89.5%
95.0%
100.0%
IU1/2 Pitch
0.0%
25.0%
50.0%
75.0%
100.0%

I get about 8 minutes flight time.
Many comment about the T-Rex's sensitivity to collective as well. This isn't a big problem after you've gained some experience, but if you'd like to have the equivalent of 'expo' on collective you can easily do this by changing your pitch curves.

If you're using a typical pitch curve, like 100-75-50-25-0, you could change it to 100-70-50-30-0 and the effect is just like having expo on collective. It's important to make sure you have the same PITCH curve on ALL throttle modes (Normal, Idle Up 1, Idle Up 2 AND Throttle Hold) so you don't get a wicked jump when changing modes.
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