Hey all,

I was building my F450 Quadcopter since the last days. Yesterday I tried to fly for the first time. Now, I have 2 Problems:

1) The Copter is completely unstable in the Stabilize-Mode. It drifts right and left and up and down. I dont know why.

2) The Front direction of the Pixhawk and the GPS+Compass Module is in the direction of the two red arms. But if I want to fly forward, The Copter goes right or left. So I can say that he "thinks", that his nose is between the white and the red arm. I dont know why.

My setup is:
DJI F450 Frame
Pixhawk Controller, newest Arducopter Version
TMotor Air Gear 350 Populsion System
Calibrated ESCs, Compass and Accelerometer.
3dr power module, LiPo 5000mah 4s
Graupner MZ18, GR24 Receiver

Here a Video: https://youtu.be/vT8SHf0RuC8

Please help me, I dont know what is Wrong.