Lost Mavic while in waypoint mission

sar104 · Nov 2, 2018

SpinItUp said:
Some reading to do may help?
Edit; @15% I think it forces autoland or at least RTH so from there it will be straight lining it home
Guy did a test for a MA so battery time is going to be different.

Neither RTH nor autoland occur at fixed battery levels - both of those levels are calculated. The RTH battery level depends on distance from the home point, while the autoland battery level depends on altitude relative to the home point.

SpinItUp · Nov 2, 2018

Thankyou sar, that's cleared that up, I'm just guestimating and due to no calculations I thought 800m from the final guess on the path to home would be near this road
distance guesses from your graphs

I see no haystacks to throw a pin into so thought I'd give it a shot!
Edit; I'm good at not calculating (using my brain)

drz12345 · Nov 3, 2018

This forum is great for blaming pilots and drones BUT everyone forgets the controller. I had an incident with my Mavic Air and had to have it replaced. I repeatedly told Tech support it was a controller problem. They would not hear of it and refused to take my controller back for a check assuring me it was fine. I continued to have problems and finally lost the drone. No flight data recorded BUT I had an AirData subscription and records. After many fights and complaints DJI agreed to replace my drone, a supervisor agreed to check the controller. Surprise bad controller. I am now fighting the replacement charges since they were an original warranty issue with the controller causing my problems. Take info on this forum with a grain of salt. Not everything is the pilot's fault

sar104 · Nov 3, 2018

drz12345 said:
This forum is great for blaming pilots and drones BUT everyone forgets the controller. I had an incident with my Mavic Air and had to have it replaced. I repeatedly told Tech support it was a controller problem. They would not hear of it and refused to take my controller back for a check assuring me it was fine. I continued to have problems and finally lost the drone. No flight data recorded BUT I had an AirData subscription and records. After many fights and complaints DJI agreed to replace my drone, a supervisor agreed to check the controller. Surprise bad controller. I am now fighting the replacement charges since they were an original warranty issue with the controller causing my problems. Take info on this forum with a grain of salt. Not everything is the pilot's fault

Are you going to cross post this in all the threads?

Oto · Nov 4, 2018

Had to leave the site yesterday with no success. At least was not able to find it on ground. From my older logs it seems when RTH it can go 60m@1% of battery so my guess was also some 300-360 meters. We did a some photos from P4Pro around the swamp so could later upload it so maybe it is possible to spot my lost Mavic in photos if it did not drown.

Oto · Nov 16, 2018

Received a free refurbished replacement Mavic from DJI after log investigation by DJI data analyze team "as no pilot error-warranty". Not sure what they saw but it was based on last uploaded logs from DJI go app and not from RC or TXT logs.
Housing was little bit dislocated in transit or from factory but not a big deal pushed it together and recalibrated all sensors.

Old one is still lost and still would like to know the fate of it. Could do a a flight test with new Mavic later in open field to calculate how far old one did really go after RTH .

Oto · Nov 20, 2018

Made a graph of "fatal.log" 32 parameters which still doesn't make much sense. First half is waypoint mission with no RC input and second half when drifting away in ATTI mode with minimal input from RC and some intermittent disconnects. From 32 parameters 9 seem to be frozen so did not show on this graph.

Last minute force landing and after RC reconnects initites RTH.

Last 10sec. Going up and then RTH.

Seems need to decompile RC firmware to get what each value actually means.

Oto · May 21, 2019

Blast from past. Recently installed DJI Pilot mission planner without connecting RC and for some reason it shows some last coordinates for lost Mavic even that I have had flights with new replacement one with DJI Go.

From where it got these coordinates? Suspicious...

SpinItUp · May 21, 2019

Oto said:
Blast from past. Recently installed DJI Pilot mission planner without connecting RC and for some reason it shows some last coordinates for lost Mavic even that I have had flights with new replacement one with DJI Go.

From where it got these coordinates? Suspicious...

Digital past can be difficult to erase.
Must be buried in the Go app.

Jackcutrone · May 21, 2019

Ask the Chinese intelligence agency. They probably know.

Oto · May 21, 2019

That what I was telling before that the app logs should be also decrypted to find such forensic evidence. Or this may come from DJI servers, who knows.