Well, I really can't answer that. I had a 6400 20c 3 cell in it with the stock motor. I crashed bad before I could get some good stats. If I had turned off my transmitter and let the apm take over, I would of been just fine. But it had no problem taking off with all my goodies on board. It has a very big wing area, and i was expecting long flights. I have another one I'm going to build this winter.