Brushless RC10GT

[crazyjr]

With around 11 volts to play with (not sure what volts the A123's carry), I'd run a 2500kv max KV. Higher end motors will help in efficiency, a 50mm medusa should be plenty. If you live in europe, you might want to look at lehner, I have a basic XL and i love it. I got lucky and got a used one here in the states. Some mamba maxes can do 4s and even 5s (you would need a UBEC), since they changed the boards and fets, its kind of pot luck. I run a quark on a UBEC and it runs great