That is Bizzare? You put the battery up front? With that Harley Davidson up there, I would imagine that you will need some tail weight. Mine flys just fine with a .91 OS and 30% Heli. It will hover, and pull out of a Hover. I built it light, and with bare needs, and it weights right at 8 lbs even... You guys put 350 Chevys on the front, you need HP to pull weight. Power=Weight Visa Versa...I love my .91 on 30%.