Quote:
Originally Posted by highflier
I don't think so the BK controller is rated to 20NMHI cells right? I thought 6s A123 cells would be the limit
I have thought about 4s2p and getting a 7xl or 8xl motor instead of the 9xl
...
The 5s2p may be perfect for me, since run time is more importent then top end... However punch is so much fun  .. |
That's if you are figuring the voltage limit @ 1.2V/cell, but NIMH charge to ~1.45V/cell off the charger, which would be ~29V for 20cells. 8S A123 would charge to ~29V. BK is a little dumb tho, that's why few use their controllers anymore, so you'd have to confirm everything. I know for a fact 6S lipo was common on the controllers, tho not sure if anyone ever ran 7S (maybe due the the odd # of cells tho.)
Anyway, running higher V does not mean more top end if you match it to the proper motor w/ lower turns. You are just making power w/ V instead of so many Amps. The end result is less wasted power and less heat. A 8s1p setup would run cooler and longer than a 4s2p setup with a similarly matched motor. You don't need to experiment if you don't want to, just letting you know the option is there.