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Havoc
Smokless Nitro
 
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Posts: 61
Join Date: Sep 2009
Location: San Antonio, TX
10.02.2009, 04:16 PM

Okay, so, the 1350kv can move on 14 nimh cells. It appears that only two of my Trinity batteries are good. I decided to charge both on that Checkpoint charger paying close attention to the discharge and recharge. Both stopped charging at around 2000mah, so I forced them to start again, both were very warm at the completion. With some time to cool, I prepped the Emaxx, had to resolder one of the connections on the ESC.

Anyway, slapped em in, walked outside and WTF!?!? I was riding wheelies, couldn't do a standing backflip, BUT, could get one in a few feet. It was like a different truck. The 1350kv can push this thing just fine, and the temps were great:

motor can = 115 - 125f
esc heatsink = 110 - 115f (fan kicked on once for a few seconds)
batteries = 115 - 128f

I was worried about the possibility of a bad rotor, but it looks like on each test run, one or both of the packs had bad charges due to out of sync cells.

Well, now I have a spare 2250kv I guess, there is no point is switching this out. However, I am considering a complete resolder job with better solder and using 6mm connectors instead of 4mm for the motor connection.

So, it was my crappy batteries, but the right combination of the two least crappiest yielded a good run (finally). I know, I know, ditch the nimh and get the lipos going. I will.

Need to make a few more test runs to make sure everything is solid. I got about 10-12 minutes out on that run, could have been longer except for the newly grown grass from all the stupid rain. Deep grass = power drain...
   
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