Originally Posted by Chris_F
I suspect the elevator itself is actually flexing. But that's just a wild guess.
Your correct here's the mod I did to stop the diving problem. This Vapor has a ball bearing gearbox, J3 Cub motor, 5030 carbon fiber prop and a Hyperion 70 cell. This combo puts out a ton of thrust and I can run it full throttle. At full throttle it will pull up and to the right with no stick input. Big loops and big circles are easy now at full throttle,also modded to do tight loops and turns. To me this is the ultimate 3-CH plane and I'll never go back to a stock one.