with etec 3s1200's, turning a GWS 11x4.7SF prop, the setup you have will put out ~22oz of thrust @ ~8A, according to motocalc. i have this setup on my 13.7oz SX2 and it hovers @ ~ half throttle, with MORE than enough to go crazy straight up. with your batteries, you'll probably get more. i avg 15+ min per flight.