Ahh, the inefficiency of ducted fans. The only way your gonna get that "pig" to fly is 8-9 cell nimh in small capacities. Try <1500mah. You'll fly for about 3 mins. Brushless will perform only a little better with that battery, power to weigh ratio not withstanding. With brushless you have to use a lipo 11.1v but not too big. Lipo's can get heavy too. [:-]