I understand your confusion on the motor, battery stuff etc.. I think this is one of the big problems that electric airplanes have. There is no standard system from the manufactures. It a mess right now. Comparing motor watts will help show interchange between them, but using weight is a rough back up. 11.1 3 cell 1800ma-2200ma(which I fly) has a ton of offereing in that size class so its a good start and fairly small. After that size battery its almost a free for all.. Btw the way, 11.1 packs are cheap as well..look at the prices after that for 4 cell etc..Jason