Mavic Mini Fly Away

kdelventhal · Dec 28, 2019

Second time i flew my Mavic Mini I brought it up a hundred feet then it just flew away and crashed. There was not that much wind.
Luckily I purchased Dji care plus and am already replacing the drone.

I would greatly appreciate any insight anyone might have. My log:

DJI Flight Log Viewer | Phantom Help

Upload and view flight logs from your DJI drones

www.phantomhelp.com

sar104 · Dec 28, 2019

This looks very much like another recent issue with a Mavic Mini:

Help analyzing a Mini crash - link to Phantomhelp.com log provided

Am bringing this over from the DJI forum with the pilot's permission. Was wondering if someone could help to analyze what was the exact cause of the crash. Was a very short flight about 40 seconds. Pilot ascended rapidly to 120', home point was recorded and it stayed in P-GPS mode. Once at 120'...

mavicpilots.com

Similar position/velocity disagreements in this case:

There was a 30° or so yaw disagreement in the other event, which is not normally enough to cause quite such uncontrolled flight. Can you retrieve the DAT file from this flight (FLY006.DAT)?

How to retrieve a mobile device DAT file: How to retrieve a V3.DAT from the tablet

MAvic_South_Oz · Dec 28, 2019

kdelventhal said:
Luckily I purchased Dji care plus and am already replacing the drone.

Maybe open up a ticket with DJI, this could turn out to be a warranty issue, and you can save your Care Refresh ?

kdelventhal · Dec 28, 2019

MAvic_South_Oz said:
Maybe open up a ticket with DJI, this could turn out to be a warranty issue, and you can save your Care Refresh ?

I already sent the drone in with the dji online repair and said it was user error so it might be to much of a hassle.

kdelventhal · Dec 28, 2019

sar104 said:
This looks very much like another recent issue with a Mavic Mini:

Help analyzing a Mini crash - link to Phantomhelp.com log provided

Am bringing this over from the DJI forum with the pilot's permission. Was wondering if someone could help to analyze what was the exact cause of the crash. Was a very short flight about 40 seconds. Pilot ascended rapidly to 120', home point was recorded and it stayed in P-GPS mode. Once at 120'...

mavicpilots.com

Similar position/velocity disagreements in this case:

View attachment 88991

There was a 30° or so yaw disagreement in the other event, which is not normally enough to cause quite such uncontrolled flight. Can you retrieve the DAT file from this flight (FLY006.DAT)?

How to retrieve a mobile device DAT file: How to retrieve a V3.DAT from the tablet

Here is the DAT file. Thanks for your help.

MAvic_South_Oz · Dec 28, 2019

kdelventhal said:
I already sent the drone in with the dji online repair and said it was user error so it might be to much of a hassle.

Well I guess see if sar104 can get anything from the DAT . . . at least you can confirm what he can glean form all the available data.
The DAT no one but DJI has access too might reveal other factors, who knows, they keep that to themselves for sure.

sar104 · Dec 28, 2019

kdelventhal said:
Here is the DAT file. Thanks for your help.

That's not the DAT file - that's the TXT log. You need to follow the instructions in post #2.

kdelventhal · Dec 28, 2019

sar104 said:
That's not the DAT file - that's the TXT log. You need to follow the instructions in post #2.

There are no files in the FlightRecords/MCDatFlightRecords folder. Let me know if there is anything else I can do

sar104 · Dec 28, 2019

kdelventhal said:
There are no files in the FlightRecords/MCDatFlightRecords folder. Let me know if there is anything else I can do

Unfortunate. That happened in several other cases too.

Mac Man · Dec 29, 2019

sar104 said:
This looks very much like another recent issue with a Mavic Mini:

Help analyzing a Mini crash - link to Phantomhelp.com log provided

Am bringing this over from the DJI forum with the pilot's permission. Was wondering if someone could help to analyze what was the exact cause of the crash. Was a very short flight about 40 seconds. Pilot ascended rapidly to 120', home point was recorded and it stayed in P-GPS mode. Once at 120'...

mavicpilots.com

Similar position/velocity disagreements in this case:

View attachment 88991

There was a 30° or so yaw disagreement in the other event, which is not normally enough to cause quite such uncontrolled flight. Can you retrieve the DAT file from this flight (FLY006.DAT)?

How to retrieve a mobile device DAT file: How to retrieve a V3.DAT from the tablet

Is there a tutorial or some instruction on interpreting these files? I am not sure what I am looking at, but would like to learn how to evaluate flight data.

sar104 · Dec 29, 2019

Mac Man said:
Is there a tutorial or some instruction on interpreting these files? I am not sure what I am looking at, but would like to learn how to evaluate flight data.

You could take a look at a recent post I put in the Mavic Crash & Flyaway Assistance forum. The subject is unfortunately quite deep.

Flight log analysis guide

Mac Man · Dec 29, 2019

sar104 said:
You could take a look at a recent post I put in the Mavic Crash & Flyaway Assistance forum. The subject is unfortunately quite deep.

Flight log analysis guide

Thank you. Deep is good! I am that kind of guy.

Mac Man · Dec 29, 2019

sar104 said:
You could take a look at a recent post I put in the Mavic Crash & Flyaway Assistance forum. The subject is unfortunately quite deep.

Flight log analysis guide

Thank you, sar104! That gave me a better understanding of the data sources. So, the sites that we upload our data to are simply converting delimited files to a “spreadsheet” format. The graphs being posted are from your own personal calculations.

Mac Man said:
Thank you. Deep is good! I am that kind of guy.

sar104 said:
You could take a look at a recent post I put in the Mavic Crash & Flyaway Assistance forum. The subject is unfortunately quite deep.

Flight log analysis guide

sar104, thanks! That was very helpful. I have a much better understanding of the data available and the sources. If I understand correctly, The sites we upload data to simply convert a delimited file to a spreadsheet. The graphs that you have posted in the past are generated by you personally.

sar104 · Dec 29, 2019

Mac Man said:
Thank you, sar104! That gave me a better understanding of the data sources. So, the sites that we upload our data to are simply converting delimited files to a “spreadsheet” format. The graphs being posted are from your own personal calculations.

Yes - the graphs I post are from Igor Pro. Others on the forum post graphs from CsvView too.

m80116 · Jan 1, 2020

I am quite worried about all these uncontrolled flights with the Mavic Mini... I've had mine completely unlink and disappear the second day of flight with no warnings, and doing a quite easy pre-planned line of sight flight.

Thomas B · Jan 1, 2020

m80116 said:
I am quite worried about all these uncontrolled flights with the Mavic Mini... I've had mine completely unlink and disappear the second day of flight with no warnings, and doing a quite easy pre-planned line of sight flight.

I assume you read the analysis in you thread explaining it... and the unremarkable AirData file you’re posted in your crash thread.

m80116 · Jan 1, 2020

Yes, I take care of all your considerations. The airdata I posted clearly shows now reasons for loss of link and least for the drone not accomplishing an auto-RTH or remaining where it was.

My Mavic Mini is to be considered lost after 3 days search operation, with 3 persons team for the first day, looking from atop a skyscraper and accessing various buildings to inspect the roofs for possible signs, pre-selected from our 10x50 binoculars inspection.

I wasn't expecting at least 3 faults in a raw from a DJI product: failing to stay connected, failing to RTH and finally failing to stay put under GPS and attitude IMU control.