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Thread: lipo c rating recomendation

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Old 07-01-2008, 10:49 AM   #1
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Default lipo c rating recomendation

I am running a mm/ bm9 combo and would like to know what c rating I can get away with? I was looking at some cost effective 3s 8c lipos and was wondering if I am safe with that low of an amperage overhead. The bm9 is really no bigger than a 400 size motor...I just don't know how many amps it draws.
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Old 07-01-2008, 10:52 AM   #2
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I would get a pack of at least 25a continous, but it really depends on your terrain. That little motor can burst about 55 to 60a under stall. Mostly it won't get above 15a.
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Old 07-01-2008, 02:06 PM   #3
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I tossed it on the watt meter with a tenergy 6cell 3800 pack still in car. I was getting 3-6 amps and from binding the tires and making the slipper slip I peaked at 17.8 amps @ 96watts.
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Old 07-01-2008, 02:22 PM   #4
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The watt meter will average the current requirements over one second intervals. The higher bursts will happen in the 1/10th second range, and will not be caught by a standard wattmeter. I still recommend a pack with at least 25a continuous.
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Old 07-01-2008, 06:48 PM   #5
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Ok, thanks for the input.
Now my only problem is finding a lipo that will fit my dimensions..
3.5"L x 2"W x 2"H that is more than 1200mah.
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Old 07-01-2008, 08:07 PM   #6
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Holmes has what you need
http://holmeshobbies.com/product.php...&cat=10&page=1
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Old 07-01-2008, 08:47 PM   #7
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I just ordered some chinese 30c 3s 1500's...reviews looked good, but I'll see for myself. Dirt cheap and yes I know you get what you pay for, although its worth a little for experimenting.
Those are new on Holmes' site....mabey if these don't work out.
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