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MM Flyaway opinion of logs

adavis

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Age
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Location
Sydney Australia
Hey all.
I had a flyaway on my Mini Christmas Eve that I had thought was simply my inexperience in putting it up with too much wind.
Luckily I was able to recover the drone to fly another day, but after I had some prop issues recently that was expertly diagnosed in this forum, I though that I would post my logs of the fly away event to see if anyone has any ideas other than wind as the cause of the issue that I had.

It was Christmas Eve and we were in the middle of a major fire event here in the Blue Mountains of Sydney Australia.
There was a hot spot of fire activity appearing on a satellite based heat source map that a LOT of people were using to get the real picture of the state of the fires, and there was a spot showing that was very close to my house and in an area untouched by fire.
If there was fire in this area, a lot of people would have to be evacuated immediately.
I checked OpenSky and determined that we were not in any no fly zones at that time and headed out with a neighbour to check out the location in dense bushland.
It was a very quick look and see and there was nothing there at all, a data error in the reporting, so I started to bring the drone straight back.
It was blown to the north west, and wouldnt go where I told it, then began to lose altitude.

I was on the top of a ridge and the Mini kept losing altitude and heading away from me.
I changed to sport and it made no difference.
To make matters worse we have rather large cliffs here and the mini was losing altitude over the edge of the cliff and as it did so I started to lose signal.
It engaged RTH on loss of signal and started to make some headway, then I stupidly decided to interrupt RTH to fly myself, and it started losing ground again.
This happened a few times.
Battery was getting very low, so I picked a spot that I might be able to retrieve it from and let it auto land on lack of battery and no signal.

Very luckily I was able to retrieve it not too long after after a very brisk hike :) and it was EXACTLY where the map and find my drone said it would be.
I managed to get it about 10m from the walking track and luckily 1-2m from the cliff edge.

Anyway, that is the background, attached are the logs.
Any analysis of this event is appreciated, and if it is, "stupid you, that was all wind" then that is all good too. :-D
 

Attachments

  • DJIFlightRecord_2019-12-24_[17-17-52].txt
    1 MB · Views: 17
I am not an expert log analyzer but I see a lot of errors about not enough force/esc error. Also lots of errors about loss of signal but I'm assuming that's when it went below the cliff. I am also interested in what the experts have to say. A quick google search of the force error says its defective hardware and a warranty will be needed. But maybe it's also wind problem? Though your flight log says the wind was only 7mph which is pretty low...
 
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That looks like the usual lack of propulsion problem from the Mini, but it is slightly complicated by the wind speed, which looks to have been marginal. It will require the DAT file ending FLY031.DAT that includes motor performance data to diagnose properly, but it's unlikely that it still exists on your mobile device.
 
It looks like a typical uncommanded descent problem for Mini. We have quite a number of such reports over the last few days here. Can you post the .DAT file of the flight as well so that a more thorough analysis can be done ? The filename of the file should end with "FLY031.DAT"

Whoops, looks like I need to type faster ....
 
Yeah ... as @sar104 said, same components as seen from the "uncommanded descent" events we have seen lately. But this time not so catastrophic with a quick dive down. I bet that the DAT (FLY031.DAT) will show maxed motors again ...

Looking at this section were the AC mostly are directed towards HP, before & after the AC icon location, it clearly drifts with the wind. The height is relative constant but the Mini never once manage to get the tilt angle up to the specified 30 degrees it should be able to achieve in Sport mode.

1582557972707.png
Graphs from the marked section above ...the markers is placed were the AC is located in above pic. head on in the wind ... only achieve 14,9 degrees tilt & no heading speed at all.

1582558091996.png

The winds for this flight ...

1582558359366.png

And all messages ...

0.0,IN FLIGHT0
124.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
124.4,STRONG WIND WARNING
124.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
307.4,IN FLIGHT0
308.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
308.4,STRONG WIND WARNING
308.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!L
323.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
325.9,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
332.9,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
332.9,RC SIGNAL LOST
332.9,REMOTE CONTROLLER SIGNAL LOST!
333.9,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
335.0,IN FLIGHT0
343.7,RETURNING TO HOME0
363.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
363.4,STRONG WIND WARNING
363.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!O
398.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
401.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
435.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
438.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
439.4,IN FLIGHT0
443.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
443.4,STRONG WIND WARNING
443.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!5
449.3,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
452.0,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
452.0,RC SIGNAL LOST
452.0,REMOTE CONTROLLER SIGNAL LOST!
460.5,IN FLIGHT0
460.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
460.5,STRONG WIND WARNING
460.5,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
461.6,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
461.8,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
462.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
462.9,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
475.5,GNO GPS SIGNAL. AIRCRAFT UNABLE TO HOVER. FLY WITH CAUTION (CODE: 30008)
475.5,TAKE OFF WITH CAUTION (NO GPS)
475.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
475.5,STRONG WIND WARNING
475.5,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
475.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
475.7,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
476.5,IN FLIGHT0
476.5,FAILSAFE MODE IN PROGRESS
478.0,RETURNING TO HOME0
478.0,RETURNING TO HOME0
494.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
494.5,STRONG WIND WARNING
494.5,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
497.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
500.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
505.1,FAILSAFE MODE IN PROGRESS
505.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
505.9,STRONG WIND WARNING
508.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
508.7,FAILSAFE MODE IN PROGRESS
512.2,STRONG WIND WARNING
512.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
513.2,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
515.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
516.3,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
529.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
532.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
536.2,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
537.5,FAILSAFE MODE IN PROGRESS
543.4,STRONG WIND WARNING
545.3,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
551.5,RETURNING TO HOME0
554.2,NREMOTE CONTROLLER SIGNAL WEAK. ADJUST REMOTE CONTROLLER ANTENNAS (CODE: 80002)
554.2,WEAK SIGNAL. ADJUST ANTENNAS
555.4,FAILSAFE MODE IN PROGRESS
555.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
555.5,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!B
556.5,STRONG WIND WARNING
556.9,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
560.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
563.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
597.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
599.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
600.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
605.5,;AIRCRAFT POWER INSUFFICIENT. FLY WITH CAUTION (CODE: 30168)
605.5,AIRCRAFT POWER INSUFFICIENT
611.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
611.5,STRONG WIND WARNING
611.5,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
626.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
632.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
635.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
667.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
670.1,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
675.5,IN FLIGHT0
695.5,IN FLIGHT0
696.9,RETURNING TO HOME0
698.1,*WEAK SIGNAL. ADJUST ANTENNAS (CODE: 80016)
698.1,WEAK SIGNAL. ADJUST ANTENNAS
701.1,RETURNING TO HOME0
733.1,*WEAK SIGNAL. ADJUST ANTENNAS (CODE: 80016)
733.1,WEAK SIGNAL. ADJUST ANTENNAS
736.0,RETURNING TO HOME0
740.3,NREMOTE CONTROLLER SIGNAL WEAK. ADJUST REMOTE CONTROLLER ANTENNAS (CODE: 80002)
740.3,WEAK SIGNAL. ADJUST ANTENNAS
740.9,RETURNING TO HOME0
748.0,FAILSAFE MODE IN PROGRESS
748.0,AIRCRAFT NOT CONNECTED TO RC
748.0,GNO GPS SIGNAL. AIRCRAFT UNABLE TO HOVER. FLY WITH CAUTION (CODE: 30008)
748.0,TAKE OFF WITH CAUTION (NO GPS)
774.5,IN FLIGHT0
775.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
775.4,STRONG WIND WARNING
775.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
787.5,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
788.3,FAILSAFE MODE IN PROGRESS
789.9,STRONG WIND WARNING
791.3,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
793.8,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
795.8,FAILSAFE MODE IN PROGRESS
796.9,STRONG WIND WARNING
798.0,FAILSAFE MODE IN PROGRESS
799.6,STRONG WIND WARNING
801.8,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
802.4,RETURNING TO HOME0
803.0,IAIRCRAFT IN HIGH INTERFERENCE ENVIRONMENT. FLY WITH CAUTION (CODE: 80015)
803.0,AIRCRAFT SIGNAL INTERFERENCE
806.0,RETURNING TO HOME0
818.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
818.4,STRONG WIND WARNING
818.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!X
837.4,RETURNING TO HOME0
839.4,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
839.4,STRONG WIND WARNING
839.4,/STRONG WIND. FLY WITH CAUTION AND LAND PROMPTLY!
855.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
857.0,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
858.6,+STRONG WIND. FLY WITH CAUTION (CODE: 30149)
858.6,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
858.6,RC SIGNAL LOST
858.6,REMOTE CONTROLLER SIGNAL LOST!U{
865.5,IN FLIGHT0
866.6,;AIRCRAFT POWER INSUFFICIENT. FLY WITH CAUTION (CODE: 30168)
866.6,AIRCRAFT POWER INSUFFICIENT
870.1,IAIRCRAFT IN HIGH INTERFERENCE ENVIRONMENT. FLY WITH CAUTION (CODE: 80015)
870.1,AIRCRAFT SIGNAL INTERFERENCE
873.1,;AIRCRAFT POWER INSUFFICIENT. FLY WITH CAUTION (CODE: 30168)
873.1,AIRCRAFT POWER INSUFFICIENT
885.0,*WEAK SIGNAL. ADJUST ANTENNAS (CODE: 80016)
885.0,WEAK SIGNAL. ADJUST ANTENNAS
886.1,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
886.1,RC SIGNAL LOST
886.1,REMOTE CONTROLLER SIGNAL LOST!
888.1,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
888.1,:REMOTE CONTROLLER DISCONNECTED FROM AIRCRAFT (CODE: 30029)
888.1,IN FLIGHT0
927.9,>CRITICAL LOW BATTERY. AIRCRAFT RETURNING TO HOME (CODE: 30184)
927.9,LOW BATTERY. RETURNING TO HOME
927.9,LOW BATTERY. RETURNING TO HOME!
928.0,>CRITICAL LOW BATTERY. AIRCRAFT RETURNING TO HOME (CODE: 30184)
929.3,>CRITICAL LOW BATTERY. AIRCRAFT RETURNING TO HOME (CODE: 30184)
931.0,>CRITICAL LOW BATTERY. AIRCRAFT RETURNING TO HOME (CODE: 30184)
 
Unfortunately, no, I dont have the DAT file any longer.
Does anyone think that it is worth talking to DJI about this event?
 
...does anyone think that it is worth talking to DJI about this event?

They will most probably point at the AC were flown in winds above the spec & that's it for them ... but sure you can try if no cost is involved.
 
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