do you have the act off or disabled? if you are using it then that is cutting your motor. I also have one and have flown it ....and flown it ...........and flown it some more! many hours, I have found the connectors on the battery to the plane will also cause this, I have had mine deadstick on me many times due to the poor plug connection. Other than that I dont know, thats been the reasons on mine. hope this helps!