Thread: Build Log Wicked powered SR-71
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Old Jun 27, 2012, 10:49 PM
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Willoughby, Ohio
Joined Jan 2002
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When I look to size a lipo I look at the amp draw first. In your case it is 120 amps. I then size for 30C which will be 120/30= 4 A/hr = 4000 mah then I buy a 40C version of the lipo to be safe. That would be the minimum lipo size I would use. On some of my other power systems around 600 watts which is like 40 amps, I run 4S 2200 lipos. So 40 amps/2.2 = 18.18C discharge rate so a 20C will work but if I buy a 30C or 40C then it will hold voltage better and not stress out the lipo so much.
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