Raf_IZ0QWM
Second Officer
Flight distance : 2864915 ft
Italy
Offline
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Many thanks for posting the video.
I tried to make a hypothesis about the tumble problem, different from what others say.
I think it is not due to a structural or design problem and therefore from an unstable condition due to the passage of air, such as Vortex ring state, but I think the problem is due to some problem on the IMU and magnetometer.
The IMU calculates the heading by seeing the velocity vector how is displaced in angle and compares it with the heading seen by the magnetometer.
If for some reason there is a bug or any problem, even magnetic interference, you can run into problems similar to the toilet bowl or, when very sudden, to an overturning if the two measures do not coincide.
Not all models have this problem.
To date I have tried three and on one there was no way to drop it or get it off balance in any way. Externally there is no difference, which however means that it is not a design problem.
Even the fact that it is the fault of the wind is not valid, because the overturning takes place under any conditions.
I would like to add that if the problem is on the MEMS component, it is likely that the instability can also occur on other fast rotations as well on the other axes, roll and pitch.
We'll see what DJI will do. |
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