Yes, I have put the H520 perfectly horizontal, and made a Gimbal calibration. Nothing changed : the problem was still there.
I got an answer from the technical service of Yuneec : I have to send the camera for repair !
Before doing this, I will ask them if it could be a firmware problem...
HI !
I just buy a secondhand H520 with a E90. In first fly, all was ok, no horizon problem. After that, i made all update (st16, gimbal, camera and dron). And now, i have the same problem : my horizon is inclined : when i start the drone, everything is ok. If i let the drone on earth and move it with my hands, the horizon stay good. But when i take off and the use yaw or camera rotation, the horizon get tilted (if i don't move, the horizon get not tilted after several seconds (10 or more)
I think it is a firmware problem. Is it possible to install an old firmware ?
@3dho : do you have an answer from Yuneec
@WTFDproject : have you ever see this kind of behaviour ?
Thanks a lot for your help !