If the 50/60 NTM is not powerfull enough, and the Scorpions a tad to expensive, have a look at this one.

http://alienpowersystem.com/shop/63m...-170kv-3200wa/

@12S it runs 7500 rpm

And yes, at full speed turning will become near impossible.

Concerning drive. Defector has run with a 3S 2200mAh pack, and had juice left after a fight.
Caliope does the same, even with the failed Brushless drive.