hi there
my spark crashed down like a stone from about 100 meter altitude .. here are the log from the litchi-app:
http://www.phantomhelp.com/logviewer/C1RO9UZA7CKE8JJ1T98S/

(on the end of the fly is 9% battery left)


i found on the smartphone also a log in a dji-folder with the same time (djj-app is not installed):
http://www.phantomhelp.com/logviewer/JZKGHI5KR4AI3ETYZ81K/

1. here it shows incorrect: after minute 6'27'' is 0% battery left .. why?


after 5:50 spark loses for 30 sek the connection .. why?


2. my spark loses often the connection .. why?

there was pure nature ..


3. and why it show on the beginning less then 50% battery .. battery was certainly about 100%


all firmwares are up + gps + imu looks good.


please help ..

4. what i can do any more? is something wrong with my spark?

Hi, thanks for reaching DJI Forum. We do apologize if you have some issues. May we ask if you updated the firmware of your aircraft?

DJI Gamora Posted at 2018-8-11 06:35
Hi, thanks for reaching DJI Forum. We do apologize if you have some issues. May we ask if you updated the firmware of your aircraft?

yes .. sorry i wrote "all firmware are up" .. tnx!

xordo Posted at 2018-8-11 06:38
yes .. sorry i wrote "all firmware are up" .. tnx!

p.s. it was very difficult to found the spark in 1000's of thornbushes (full of them) .. and i got 100 thicks .. many days very itching .. but happy to found

the question for me ist:
hardware or software-error?

or is there an other answer?

Both logs clearly show, that battery was about 48% at the take off.  So it's clear that after about 7min it discharged to 0% ( full time about 14 minutes average
Now the question - are 100% sure that the battery was showing 100% at the take off moment?

nixuspix Posted at 2018-8-11 07:01
Both logs clearly show, that battery was about 48% at the take off.  So it's clear that after about 7min it discharged to 0% ( full time about 14 minutes average
Now the question - are 100% sure that the battery was showing 100% at the take off moment?

on the end, the battery was 9:% .. not 0% .. i think the dji-log is false .. the litchi-log shows 9% on the end.

unfortunately i don't verified the state of charge if i found the spark

i loaded booth batterys 2 weeks ago to 100% .. always 100%

and if: why the drone not came home to the right-time .. ?
can i not leave me, that de drone came back to the right time?

xordo Posted at 2018-8-11 07:10
on the end, the battery was 9:% .. not 0% .. i think the dji-log is false .. the litchi-log shows 9% on the end.

unfortunately i don't verified the state of charge if i found the spark

Battery charged 2 weeks ago? The intelligent battery is supposed to begin a self-discharge at 10 days.

Chuck101 Posted at 2018-8-11 07:14
Battery charged 2 weeks ago? The intelligent battery is supposed to begin a self-discharge at 10 days.

50%?

the question would be: howmany % in howmany time ..

and i am shure: when the spark crashed, the battery was 9% .. 100% shure!

After 2 minutes on 9%, you can expect it to fall down. 1 minute in the air is about 7.5% battery. Next time, when you are on 200m and the bird starts autolanding, use the throttle down, also. That gives a bit speed for the elevator! 200m in autolanding alone is over one minute time for getting it down.

Now the question is, why the battery info froze.
And why your battery shows all 3 cells "falling" for a long time 0.1volt down in 1/10 of a second
Open a case

xordo Posted at 2018-8-11 07:22
50%?

the question would be: howmany % in howmany time ..

Yeah, 9% for over 2 minutes already, mate!
Which is "Mission impossible"

xordo Posted at 2018-8-11 07:10
on the end, the battery was 9:% .. not 0% .. i think the dji-log is false .. the litchi-log shows 9% on the end.

unfortunately i don't verified the state of charge if i found the spark

You are right, the log is wrong!
No battery stays for 2 minutes on 9%
So the app froze the batt info.
Which may get you a chance, to get a discount or even a replacement.

Just: starting with 50% up to 200meters?

hmmm, i tryed i fresh fly now, and i was short with 30% batterie (70% left)  in 440 meter altitude .. no problem .. after i cam down with the bird it had 48% batterie

some things irritated me:
1. and important:  many connection loses - after the peak of 440 meter .. to this, it was o.k .. but after: why often loses connection with more than 50% batterie on a line of sight?
2. why my battery shows in the log only 96% .. it was just now loaded
3. why the logs are cutted after 1 minute? no possible to analyse

http://www.phantomhelp.com/logviewer/FYIZCRQLA9BPBGACW6Z4/

Hate to say, the DJI log is going to be the accurate one.

Litchi is 3rd party software and is more likely to produce false readings.

And also flying litchi, there is no case to file because again of using 3rd party software.

Chalk it up to the intelligent batteries auto discharging after 10 days and always check your batteries before flight.

Dont forget that the phantom help log  viewer is also 3rd party.
Only DJI have the  software to  read the flight  logs with 100% accuracy.

And flying at  440 meters is  just being stupid.....

tnx to pmshop and s-e-ven!

another question in this relation:
why beginn in 3m 42.9s (dji-log)  3'29' (litchi-log) 'the "auto landing" - modus? .. i have this so many times .. normaly it comes if the connection loses .. but to this time nothing in the log is writen

and why this is so often (also with dji-spark-app)? thats why i ignore it mostly and fly to the point, that "forced landing" is starting ..
only these allways loud "piep" "piep" "piep" is very nerving .. how i stop this?

it is possible to make this loud "piep" "piep" "piep"quieter?

Harbourside Posted at 2018-8-11 11:34
Dont forget that the phantom help log  viewer is also 3rd party.
Only DJI have the  software to  read the flight  logs with 100% accuracy.

stupid??

make a stop

for me here in small switzerland one of the best possibilties to fly free without to be in neighbor's garden or a fly-restrict area.

i see over the mountains in other valleys and enjoy the view down ..

and for to learn more about this hightech-bird i can go far with less risk to lose the bird


stupid??

i beliefe y..

xordo Posted at 2018-8-11 12:42
stupid??

make a stop

Hi Xordo,

Oh yes, plain stupid.

In France, small drones are allowed a maximum altitude of 150m above ground level.
Especially in the mountains there are sailplanes, paraglider, parachuters, helicopters and other air traffic.
THEY CAN'T SEE A SMALL DRONE LIKE A SPARK!

Please, inform yourself about the regulations and stick to them.
It is people like you that give our cool hobby a bad reputation.

Stay safe,
Wolferl

Just looked it up out of curiosity: for being a European country, Switzerland has quite relaxed regulations.
Small drones like a Spark below 500 grams don't have an altitude limit, but a pilot must be aware to share air space with other traffic above 150m.
And there are a lot of NFZs, not anly airports and airfields, also national parks!

Fly safe, fly legal.
Wolferl

Wolferl Posted at 2018-8-12 00:58
Hi Xordo,

Oh yes, plain stupid.

not stupid: criminel
there was minimum 10km no other aircraft around there ..
sorry i'm not so worry about norms and rulkes .. i look self and nobody will disturbed from me .. only here in words may be
sorry i think self .. "fok" the police

sorry for confusion .. i changed my name from "xordo" to "also stupid" .. as answer to the nice reviews

and sorry for my bad english an typingerrors .. in last post: "norm and rules" .. than i mean: "i try do not disturb anyone with my drone"

and: switzerland is to small for a certain freedom .. here life to many people .. to many rules .. but i found my own way

Please need ypur help here guys i lost it,the support helped as always... so you might be able to help
https://forum.dji.com/thread-161299-1-1.html?mobile=2

sorry to read that

Is your drone ok after the fall???

Greg F Posted at 2018-8-12 04:46
Is your drone ok after the fall???

i hope so .. no irritations in 3 flights after the fall.

she came down in a field of thorn bushes .. my poor skin

thanks for demand

also stupid Posted at 2018-8-12 05:02
i hope so .. no irritations in 3 flyes after the fall.

she came down in a fleld of thorn bushes .. my poor skin

Just make sure you do a IMU & Compass calibration after the crash..  I'm sure u already have.   Hope it's ok.

Greg F Posted at 2018-8-12 05:03
Just make sure you do a IMU & Compass calibration after the crash..  I'm sure u already have.   Hope it's ok.

is planned .. but here to much radiation to do it

also stupid Posted at 2018-8-12 05:06
is planned .. but here to much radiation to do it

Do it as soon as possible as after a crash u need to do a IMU calibration.

Greg F Posted at 2018-8-12 05:16
Do it as soon as possible as after a crash u need to do a IMU calibration.

eye eye sir
tnx

also stupid Posted at 2018-8-12 05:18
eye eye sir
tnx

the imu and the compass looks good .. but what i sayed: it's planned

also stupid Posted at 2018-8-12 05:25
the imu and the compass looks good .. but what i sayed: it's planned

Cool...  

To the last question, some posts above :
Auto landing starts, when the battery has just enough juice left, to get the bird down onto the ground.
On most altitudes it is around 10%.
But in case you are 200 or 400m up, you need more battery to land. 20 or 25, perhaps.
Calculate 180m as max speed, 7-8% per minute flight time. 10% is a failsafe for DJI.
Autolanding is slower, if I remember that right
Will check, next time I fly

But: Using also throttle down, in "auto landing" mode, that is speeding the landing up, a lot.

I almost "burried"my Spark once, landing with stick and just 3 or 4m over ground, the autolanding kicked additional in.
;-)

I would not say stupid to fly around 500m (I think everyone want to try that out once ), it´s just to much for the Spark. Even in calm wind condition you only have maybe 2-3 minutes to calibrate your camera and take some footage, and if you accidentally want to take a 360 pano then you will find yourself on the border of your sparks ability. 300m is the highest optimum I think.
Anyway is that only me, who found that really strange you have DJI log file even you don´t have the app installed on your phone?

Just an addition:
With throttle down, critical battery landing is 3m/s, even if just 3m over the ground.
Without throttle it seems to be a lot less (1.2 m/s), but already on 20 or 30 m height
Have not checked critical battery on 50m or higher.
On the linked log, the auto landing is all the time just about 2-3 mph

Xordo, did your Spark cross some clouds?

S-e-ven Posted at 2018-8-12 21:36
Just an addition:
With throttle down, critical battery landing is 3m/s, even if just 3m over the ground.
Without throttle it seems to be a lot less (1.2 m/s), but already on 20 or 30 m height

s-e-ven posted: "On the linked log, the auto landing is all the time just about 2-3 mph
Xordo, did your Spark cross some clouds?"

no no .. i tried to come up .. or to break the autolanding-mode

i wrote here in a upper post:
"and why i have this is so often (autlanding-mode .. also with dji-spark-app) - i ignore  it mostly and fly to the point, that "forced landing" is starting ..
only these allways loud "piep" "piep" "piep" is very nerving .. how i stop this?"

sorry .. something stupid .. but realy nerving this behavior

normaly i never had problems to come down to the right time

ViPatrik Posted at 2018-8-12 21:07
I would not say stupid to fly around 500m (I think everyone want to try that out once ), it´s just to much for the Spark. Even in calm wind condition you only have maybe 2-3 minutes to calibrate your camera and take some footage, and if you accidentally want to take a 360 pano then you will find yourself on the border of your sparks ability. 300m is the highest optimum I think.
Anyway is that only me, who found that really strange you have DJI log file even you don´t have the app installed on your phone?

i was also surprised .. maybe from an old installation .. but
1. in the app-list is no more dji-go app
2. i started only liychi .. lichi must maked this .. minimum the initialisation

this beavior must be normal .. i d'ont no ?

i fly often over 400 meter .. but only for fun, for snapshots, to see fare

also stupid Posted at 2018-8-13 13:08
i was also surprised .. maybe from an old installation .. but
1. in the app-list is no more dji-go app
2. i started only liychi .. lichi must maked this .. minimum the initialisation

the only point you can raise here legally with DJI is why the app did not warn you about the flight return time is only enough for RTH !!
Or perhaps you ignored this warning which will give you no warranty for the crash.

Starting your flight with a battery reading 48% that had already started auto discharge.....1 st mistake.

in 2 minutes,  your battery was already into low voltage......you were flying with less than 3.5v per cell.  Most every Pilot here is landed well before then.

At 23% battery and 3 min 24 sec you were over 500ft and climbing, and your battery was reporting under 3.5v per cell.

I also fly RC planes.....some are quite fast......I am LANDED and the batteries are out at no less than 3.7v per cell.....and they are a tad warm at that.......

Point being you SHOULD NOT BE IN THE AIR with less than 15% battery......

Good luck next time
Randy