I have build QUAD 450 in X mode
propeller 10*47
motor sunny sky V2216-12 800KV
battery 3S 4400mah.
1. When AQ takeoff, it didn't hold the heading.
Instead it would first rotate, then back to the Heading preset on the ground.
This would happen,no matter on ALT hold or Postion hold mode.
2. When AQ move forward after or right left,it descend and then ascend.
Is it mean, it in a bad altitude hold.
By the way,I have put a black foam on barometer.
3. The AQ'attitude control still exsit a little unstable,
especially when a gust wind come, it can't keep the attitude.