Quote:
Originally Posted by modelimages
got to get over a couple of problems first, first one is voltage 2 cell lipo is 7.4v bit of an advantage over 7.2v from the nimh so you couldn't really run both types of battery together and the next problem is energy we are barely keeping the speedo's and motors together for 5 minutes using 4200 at 7.2v so adding more volts and runtime equals more heat to get rid of.
and the final point is safety, they do go bang and do so in a big way, both in use and whilst being charged 130 drivers at a national = at least one bang!
i can see it coming but not next year
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First, voltage:
NiMH sub-c cells are still referred to "1.2V" batteries because that's their traditional name. If you read the label on matched IB4200 World Championship cells, you'll find many labelled at 1.3V average (discharged at 30 or often 35 amps). I don't see how a six cell pack made out of these cells can be called a 7.2V pack.
2nd, go bang:
Some LiPos do go bang. It's true. I think ultimately there will be a real need for race organisers to sort out which LiPos are safe and which are not (and its probably safe to guess it will be a long and complicated process, involving cloned products, all sorts of certificates and stickers, danger awareness campaigns, and accusations of bribery, corruption and foul play) so that even accounting for user idiocy, the abused packs will just let out the magic smoke instead of exploding.