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500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 10-14-2008, 04:38 PM   #1
heliwill
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Default Rolls funny

Hello guys,

I've been flying my 500 for about 20-30 flights now. I'm coming from nitro raptors. What I'm noticing is that my heli rolls not just around its horizonal axis, there is some pitch mixed into the roll. I setup my head using Bob's videos (thanks Mr. Finless)... No, mixing in my radio (DX7)... Any suggestions?
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Old 10-14-2008, 05:15 PM   #2
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sounds like you have trim or subtrim... unless your links are set perfectly where it doesn't move at all it will happen
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Old 10-14-2008, 05:48 PM   #3
heliwill
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But don't we use subtrim to align the control arms 90degrees? I'm only going by Bob's videos. 120 swash is new to me.
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Old 10-14-2008, 05:56 PM   #4
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well it shouldnt affect it enough to spin it... is it always the same pitch in it? its quite possiable your pulling the stick up or down while you do that, get sombody to watch you when you fly and see if your pulling and you don't realize... also have you oiled your main shaft? your washoutbase could be worn and allowing enough slop to make it spin a bit...
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Old 10-14-2008, 06:03 PM   #5
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get a swash plate leveler like this

http://www.grandrc.com/inc/sdetail/124954

and set your servos to 90 and set your link acording to it
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Old 10-14-2008, 06:44 PM   #6
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Is it a phasing problem? Does it do the opposite with opposite aileron?

Are your links too tight?
Is your CG right?
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Old 10-14-2008, 11:20 PM   #7
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Check CG and headspeed...
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Old 10-15-2008, 08:30 AM   #8
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Thanks for the input, my headspeed should be good i'm running 100% with stock motor and outrage batteries, the CG checks, my full size tail servo offsets the 3000mah... I can roll my raptor like an arrow, so does that count? Seems to me I need a swash leveler since I only leveled it my eyeball. God gave me 20/15 vision, but also one shorter leg!
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Old 10-19-2008, 06:17 PM   #9
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Ok guys still stuck.

I got the FMP swashlever today and got the setup perfect. It's a little better, but the nose still diverges from the roll. Any more ideas?
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Old 10-19-2008, 06:39 PM   #10
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Loosen up on the collective. To do a nice roll with some forward speed go back to nearly 0 pitch and roll. Giving too much pitch is usually what makes you roll the way you describe.
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Old 10-19-2008, 06:46 PM   #11
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Well it happens on all lines, vertical and horizontal.. I know my vertical is at 0 degrees... thanks for the imput
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Old 10-19-2008, 09:48 PM   #12
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I used to have this same issue with rolls to the left but rolls to the right were spot on. A buddy of mine noticed that I pushed "slighty" up as well as left when attempting a left roll. I never did this on the SIM, just in real life. Once I started concentrating on making sure I didn't put any vertical movement on the stick while rolling, they seemed to work out nice.

Basically what I'm saying here is, to make sure your rolls are comming out the way you want the to be do the following:

1. Make sure your swash is level.
2. Make sure your servo arms are level at 0 degrees pitch.
3. Make sure your linkages are the same on each of the cyclic servos.
4. Make sure your center of gravity is not off with your battery installed.
5. Make sure "your" not the one putting extra input on the sticks when you perform the manuver.
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Old 10-20-2008, 02:55 AM   #13
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I'll borrow the thread here, hope this is OK.

Since we in this thread have noted that getting servos exactly 90* at 0 pitch, how do you know they are?

Are there tools or methods out there other than eyeballing the servo arms to get the servos at 90?
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Old 10-20-2008, 09:01 AM   #14
heliwill
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I'm going to take a look at my setup again. I'm running 3517's and they are so touchy that in my living room trying to move the stick left or right w/o interaction is almost impossible. So I imagine that some input is making its way to the swash. However, I can roll my raptor just fine, and the nose corkscrews very symmetrical throughout the entire roll. So that leads me back to my setup....

The only reason I care... Its enough to slow my forward or backward momentum.

Good question Boddan... any tools for 90'ing the servo arms?
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500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

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