Quote:
Originally Posted by Shaun Coon
we had this problem too! you have to charge it longer even if it says fully charged because volt meters dont measure under load the battery wasnt fully charged. so charge them longer.
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I highly doubt this would ever fix a problem, since I'm sure most teams (if not every single one) uses smart chargers that after reaching the battery's full charge state will drop the current output to a very small value for "trickle charging". What you are referring to is a concept called "surface charge", which Al talks about here:
http://www.chiefdelphi.com/forums/sh...47&postcount=8
Madison is most assuredly correct. Even if you find that one battery is indeed bad you should use the fantastic spreadsheet that JesseK made to help on this:
http://www.chiefdelphi.com/media/papers/2469
Since you are running 6WD, in the spreadsheet linked above consider it as a 4WD with a shortened wheel base. Make sure to find the appropriate coefficients of friction for your wheels. You did not indicate the type of wheels, just the diameter. Assuming you are using all KOP wheels the friction coefficient is about 1.
When I put in this data in this spreadsheet it shows that you are geared way too high (15 fps, wow...). It is important to go through a good design process when you are involved in this kind of competition. After putting in for the Toughbox that brings you down to 7.2 feet/second, much more tolerable and even able to rotate, how about that.