I was flying my ALTA on a shooting today, flew 4-5 flight without problem, then suddenly lost control, the copter started making very stragne noise (high vibration) and then started to yaw left and roll left and in a spiral it crashed. Temperature was 4 celsius, the gros weight was 12.5 kg. After crashing I could stop the motors, only when I teared off the batteries. Tried to contact Freefly, but no response yet. Is there any way to check the log files?