Mavic Mini flyaway
- Thread starter Davidmito
- Start date
It's scrambled as well.
Looking at your flight path and description of the incident in post #1, it has a lot of the signs of a yaw error incident.
Can you describe the surface you launched from and any steel items that might have been within 10 feet of it?
If I remember correctly this was a hand launch on this occasion. The structure I was trying to photograph is a steel structure...but I believe I was approx 50-60ft away.
I flew towards it (drone flew normally - no issues), then flew backwards to get a better shot of the city in the background.
Looking at the screen I noticed that it started to drift slowly to the left - no wind at all.
When I then looked up at the drone to check it position it then just flew in a circle and then off to my right - I thought I had lost it as it wasn't responding to my stick control.
Eventually after a few seconds I managed to regain control, reduce altitude and flew back and landed.
Any reason why the flight data is scrambled?
I'm not sure.
I've only seen it a few times but never understood what caused it.
Looks like the data is corrupted somehow.
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Have seen this before, @sar104 did one like this not sure if it could be delat with.
Right - another one of those. Yes - it's recoverable - I just need to apply the correction routines. That will take a while.
That's the correct file, but the problem appears to be magnetic interference at startup. Can you see if you can find the mobile device DAT file ending FLY043.DAT?
Hi, thanks for the reply...looking through my phone it says that this folder is empty.
Right - but you have auto-sync turned on, and that deletes the DAT files after synchronization occurs.
I have managed to look at the flight data on airdata and according to this the propeller has fallen off several times during the flight.
Ok, sorry....this is my 1st drone so I am not sure. Is it best then to have this turned off?
No - the txt flight logs from your aircraft are corrupted, and so the AirData parser is simply getting confused. You didn't have any propeller issues, and most of those notifications are artifacts of the corrupt data. I have cleaned up the important data - hence my comment above that this looks like magnetic interference at takeoff.
Well if you want access to the DAT files when you need them then yes - it should definitely be turned off.
Thanks for your help. Have you any idea why they would be corrupted? Anything that I need to do?
Would the file be corrupt as well if downloaded from AirData? Looks a bit better than what Phantom LogViewer displayed.
Neither of those websites is able to correct the data errors. I've not been able to figure out what causes it - I've only seen three total instances of this problem.
It is either magnetic interference at the takeoff location or an IMU problem in flight - the velocity disagreements are quite characteristic:
Unfortunately, without the DAT file that contains the raw sensor data, it is difficult to figure out the exact cause.
Unfortunately, without the DAT file that contains the raw sensor data, it is difficult to figure out the exact cause.
Prismatic
Well-Known Member
I should think that the recovery of control is a clue, no? An intermittent failure in the IMU could (possibly, maybe) revert to correct performance in flight. In contrast a yaw error caused by a faulty compass initialization is never "autocorrected" because there's no physical fault at play, intermittent or otherwise. (Assuming the Mini can't reset the compass after takeoff; only the Mavic 2 has that capacity.)
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Considering all the above, I'd think the only thing the OP can now do is contact DJI (chat), tell them you've had this crash and ask what has happened . . . go through the procedure of having them look at the log (and DAT they should have).
It will come down to them doing the right thing unless they can find a definitive pilot error somewhere.
One more thing you COULD try, is when talking to DJI, ask for the copy of the DAT file to be emailed to you.
There was a case just in the past few days here, where the pilot asked for his DAT, and they sent it to him.
It was uploaded there and checked.
Here it is . . . check on from this past by that thread OP . . .
It will come down to them doing the right thing unless they can find a definitive pilot error somewhere.
One more thing you COULD try, is when talking to DJI, ask for the copy of the DAT file to be emailed to you.
There was a case just in the past few days here, where the pilot asked for his DAT, and they sent it to him.
It was uploaded there and checked.
Here it is . . . check on from this past by that thread OP . . .
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