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help me interpret my 6s flux eagletree log
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Trike
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help me interpret my 6s flux eagletree log - 07.15.2009, 12:50 AM

I'm running 2 3s 5000mah 20C/30C turnigy packs on my flux with a 20T pinion.
I have toned down the settings and throttle curve on the ESC.


100% punch control
lowest motor timing
reduced throttle curve

I wanted to see if the packs can keep up with the flux and prevent cooking the ESC. I hooked up the logger on one of the packs. I did a few standing backflips to see what kind of current is drawn.

To me, it appears i'm close to the limit of the pack, with one peak at 100a and voltage drop at 10.77. Is the rule of thumb, to keep it above 3v per cell at the C rating?

Can you guys tell me your interpretation of the log?

Thanks!
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Last edited by Trike; 07.15.2009 at 12:53 AM.
   
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fastbaja5b
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07.15.2009, 01:05 AM

Looks like a pretty healthy graph to me, on 4s I get 120 Amp peaks and voltage drop around 3.4-3.5v a cell so you're spot on.

If the pack got under 9v then it'd be a concern (pack can't handle the amp draw)

But all looks good from here!


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othello
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07.15.2009, 04:30 AM

Deepest voltage drop: 10.77V / 3s = 3.59V/cell

I think you have nothing to worry about. Your cells are up to the job. But there might be a larger drop in voltage at 290s when you look closer at the graph. 10.77V x2 (packs) x 100A = 2154W peak.


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zeropointbug
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07.15.2009, 12:38 PM

Dang, those things really are pretty darn good, considering the C rating. My Hyperion G3 35C packs (4200mah) hold around 22C at 3.7v/cell... so those Turnigy's might even be the same cells as the 25C, 30C versions...

Although the G3's only get more powerful as they age, so I've got nothing to worry about. Whenever I get my Eagletree working again (installed latest firmware 6.93 and it doesn't want to work now) I will post some more discharge graphs. I also did my first 5C charge on them last night and they did great! Stone cold and held CC phase for the majority of the charge.


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eagletree, flux, lipo, log


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