Heres a new one I've never seen before, my colco thunderbird trottles up fine when I'm holding the skids down to test it, but when I'm not holding it trying to get it to lift off at half trottle just getting light on the skids the motors stop both of them, I bring the trottle all the way back to start over its fine until that halfway point. Ok guys any ideas.
Thanks James

Batteries sound dead recharge for 2 hours