hi guys
i took my spark out for a flight today in my yard(flew it here about 5 or 6 times) and after the first battery died i put in a fresh one and the spark did some wierd things. the first few minutes were fine but than it just started doing 360 turns in mid air and flying away from me, it also crashed down to the ground and than took off again straight up doing 360's. the only warning i was getting is wind velocity but i would say this was a small breeze, flew it in heavy winds before and at 50 meters high no issues. the spark than gave a warning "command failed" and although it was flying over 20 or odd meters high it showed an altitude an negative 15 meters???? i was about 20 meters away from the drone line of sight using the RC connected to an iphone 8 with the latest software on both the phone and drone. i would like to upload the flight log here but not sure how to do that so some advice would be appreciated. Thanks in advance.

Hi, sir. We would not recommend users fly in high wind environment for better flight performance. After the crash, any error message from the app? Please fly your spark in recommended environment and update the situation here.

Sounds like an interesting one!
Logs can be retrieved this way
https://youtu.be/Mn3Vhx6WstI
Then upload to http://www.phantomhelp.com/logviewer/upload/
And reply back here with the url phantomhelp gives you

Lyons90 Posted at 2017-12-11 00:37
Sounds like an interesting one!
Logs can be retrieved this way
https://youtu.be/Mn3Vhx6WstI

thanks will do that when I get home

DJI Elektra Posted at 2017-12-11 00:26
Hi, sir. We would not recommend users fly in high wind environment for better flight performance. After the crash, any error message from the app? Please fly your spark in recommended environment and update the situation here.

hi, is it possible for you to get my flight log from the Dji cloud, I did the Synchronization yesterday after the flight?

Lyons90 Posted at 2017-12-11 00:37
Sounds like an interesting one!
Logs can be retrieved this way
https://youtu.be/Mn3Vhx6WstI

hi, please find attached link of flight data
http://app.airdata.com/main?share=unQXTZ

http://app.airdata.com/main?share=unQXTZ
flight record of crash

Suren Posted at 2017-12-11 10:27
hi, please find attached link of flight data
http://app.airdata.com/main?share=unQXTZ

Could you please upload the same file to http://www.phantomhelp.com/logviewer/upload/

Sounds like an interesting case.  There are some real experts at reviewing these logs here, I'm curious to see what they piece together.

Todd in Chicago

Airdata are not great logs phantom help much better.

Suren Posted at 2017-12-11 11:01
http://app.airdata.com/main?share=unQXTZ
flight record of crash

Also, it appears that this is the first flight for the battery, is that correct?

At take off it was only charged to 70%, has this come straight out of the box?

Regards,
Peter

hi, yes it is a new battery the old one was giving an error 130 could not take off, the battery was fully charged until the lights went off.

Lyons90 Posted at 2017-12-11 14:11
Could you please upload the same file to http://www.phantomhelp.com/logviewer/upload/

downloading itunes to this pc then will upload

Lyons90 Posted at 2017-12-11 14:11
Could you please upload the same file to http://www.phantomhelp.com/logviewer/upload/

hi, please find flight log as requested.

http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

Lyons90 Posted at 2017-12-11 14:11
Could you please upload the same file to http://www.phantomhelp.com/logviewer/upload/

hi, this is the flight log for the first flight flew until the battery ran to 16% than brought it back and put in the next battery and all hell broke loose.

http://www.phantomhelp.com/logviewer/GOXPCH6BB0RFB7Q2WXET/

DJI Elektra Posted at 2017-12-11 00:26
Hi, sir. We would not recommend users fly in high wind environment for better flight performance. After the crash, any error message from the app? Please fly your spark in recommended environment and update the situation here.

hi, any news has yet, I have mailed Dji the flight log and still await their response, please help with this.

http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

a youtube video of the actual flight log

Suren Posted at 2017-12-12 03:11
hi, this is the flight log for the first flight flew until the battery ran to 16% than brought it back and put in the next battery and all hell broke loose.

http://www.phantomhelp.com/logviewer/GOXPCH6BB0RFB7Q2WXET/

Thank you for the logs and the video.

To be honest, I am stumped. This is definitely a case for the engineers! The black box data may show more.
Or one of the more experienced guys here can pick up on something that I can't.

Only 1 note that I have, what is your battery alerts set to?

Best of luck, please keep us up to date with what DJI engineers respond with!!

Regards,
Peter

Lyons90 Posted at 2017-12-12 14:00
Thank you for the logs and the video.

To be honest, I am stumped. This is definitely a case for the engineers! The black box data may show more.

I fully share your view, I can't say more either.

Lyons90 Posted at 2017-12-12 14:00
Thank you for the logs and the video.

To be honest, I am stumped. This is definitely a case for the engineers! The black box data may show more.

hi, thanks for the reply. the battery alert is set at 30%

Suren Posted at 2017-12-11 02:55
hi, is it possible for you to get my flight log from the Dji cloud, I did the Synchronization yesterday after the flight?

Hi, Suren. Please note that the flight logs will be saved in your phone. Here is the path for your reference: /sdcard/DJI/dji.go.v4/FlightRecord/SyncResult. You can find your records there. Thanks for your support.

DJI Elektra Posted at 2017-12-13 03:19
Hi, Suren. Please note that the flight logs will be saved in your phone. Here is the path for your reference: /sdcard/DJI/dji.go.v4/FlightRecord/SyncResult. You can find your records there. Thanks for your support.

hi, if you refer to above posts you will find the flight logs there including a video of it.

Suren Posted at 2017-12-13 03:37
hi, if you refer to above posts you will find the flight logs there including a video of it.

I see. If you spark can not funtion well, please contact our support and start a case: http://www.dji.com/support. You can provide the flight data to them.

DJI Elektra Posted at 2017-12-13 04:07
I see. Besides, error code 130 indicates that the difference between battery cells is large and the battery cannot not be used normally. Please contact our support and start a case: http://www.dji.com/support.

hi, I think you missing the posts here. the thread was started was in regards to the drone falling from the sky and then taking off and away showing a negative altitude. if you refer to the phantom helper log links and my you tube video above you will see what the issue is.

Suren Posted at 2017-12-13 04:12
hi, I think you missing the posts here. the thread was started was in regards to the drone falling from the sky and then taking off and away showing a negative altitude. if you refer to the phantom helper log links and my you tube video above you will see what the issue is.

http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

Suren Posted at 2017-12-13 04:12
http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

http://www.phantomhelp.com/logviewer/GOXPCH6BB0RFB7Q2WXET/

this is the link that has the log file for when the spark went mad

Was there a lot of wind? it seems that the spark wanted to go home but could not move .. it is already the second case that I read here on the forum

Pirikitto Posted at 2017-12-13 06:20
Was there a lot of wind? it seems that the spark wanted to go home but could not move .. it is already the second case that I read here on the forum

hi, yes ther was wind but very low wind more like a breeze if i may say

DJI Elektra Posted at 2017-12-13 04:07
I see. If you spark can not funtion well, please contact our support and start a case: http://www.dji.com/support. You can provide the flight data to them.

no response as yet from either Dji or anyone to a solution on this product, it seems that I made a hugh mistake buying a Dji Product and should have stuck with Hubsan

Suren Posted at 2017-12-14 23:08
no response as yet from either Dji or anyone to a solution on this product, it seems that I made a hugh mistake buying a Dji Product and should have stuck with Hubsan

Please send your data to our support and start a case to locate the problem. I believe that they will find the answer for you. Hope it can solved soon.

DJI Elektra Posted at 2017-12-16 02:05
Please send your data to our support and start a case to locate the problem. I believe that they will find the answer for you. Hope it can solved soon.

hi, i sent that info numerous times.

Suren Posted at 2017-12-16 07:52
hi, i sent that info numerous times.

I see. Please tell me the case number and I will check it for you. Thanks for your support.

DJI Elektra Posted at 2017-12-18 03:43
I see. Please tell me the case number and I will check it for you. Thanks for your support.

hi, I have not even received the case number has yet, still awaiting that.

Looking at the logs and the video, from my uneducated opinion, the behavior seems consistent with the Spark struggling against a very strong wind.  In the logs, we can see that the aircraft is pitched at a fairly steep angle 30-37 degrees and yet it is not moving at all (0 mph).  You can see this on lines 3308-3314 of the log file while the aircraft is in GoHome mode.  To me this indicates it was trying to buck a wind that was at least 22mph.  Similar type of behavior can be seen all along the log file showing that the aircraft is pitched at a steep angle, but not moving hardly at all.  Normally, I would expect if the aircraft were pitched at such a steep angle for long periods of time, it would be moving at a very fast rate if there were no winds.  

Also, looking at the location of your flight, it looks like you may have been flying across a little bit of a valley.  If that is the case, then it is very possible for the negative altitude numbers.  The starting location of your flight is the base level (i.e. 0 meters).  If the landing spot was lower than the takeoff location, then the negative numbers are what would be expected.

Weather for the general area shows that the max wind speed for the day was 16mph.  https://www.wunderground.com/his ... name=South%20Africa

Localized wind speeds could be even faster than recorded for the area based on geographic features.

The above are based solely on this uneducated, non-expert interpreted from the provided log files.  If you see something different in the logs I'm misinterpreting or haven't taken into account, I would be interested to see so I can learn more.  Also,  I obviously wasn't there, so hard for me to compare my observations to real life.

Kloo Gee Posted at 2017-12-18 08:53
Looking at the logs and the video, from my uneducated opinion, the behavior seems consistent with the Spark struggling against a very strong wind.  In the logs, we can see that the aircraft is pitched at a fairly steep angle 30-37 degrees and yet it is not moving at all (0 mph).  You can see this on lines 3308-3314 of the log file while the aircraft is in GoHome mode.  To me this indicates it was trying to buck a wind that was at least 22mph.  Similar type of behavior can be seen all along the log file showing that the aircraft is pitched at a steep angle, but not moving hardly at all.  Normally, I would expect if the aircraft were pitched at such a steep angle for long periods of time, it would be moving at a very fast rate if there were no winds.  

Also, looking at the location of your flight, it looks like you may have been flying across a little bit of a valley.  If that is the case, then it is very possible for the negative altitude numbers.  The starting location of your flight is the base level (i.e. 0 meters).  If the landing spot was lower than the takeoff location, then the negative numbers are what would be expected.

"uneducated, non-expert"
Aren't you slightly understating here? ;-) Nobody will believe it anyway

Kloo Gee Posted at 2017-12-18 08:53
Looking at the logs and the video, from my uneducated opinion, the behavior seems consistent with the Spark struggling against a very strong wind.  In the logs, we can see that the aircraft is pitched at a fairly steep angle 30-37 degrees and yet it is not moving at all (0 mph).  You can see this on lines 3308-3314 of the log file while the aircraft is in GoHome mode.  To me this indicates it was trying to buck a wind that was at least 22mph.  Similar type of behavior can be seen all along the log file showing that the aircraft is pitched at a steep angle, but not moving hardly at all.  Normally, I would expect if the aircraft were pitched at such a steep angle for long periods of time, it would be moving at a very fast rate if there were no winds.  

Also, looking at the location of your flight, it looks like you may have been flying across a little bit of a valley.  If that is the case, then it is very possible for the negative altitude numbers.  The starting location of your flight is the base level (i.e. 0 meters).  If the landing spot was lower than the takeoff location, then the negative numbers are what would be expected.

hi, there are no valleys by me that i flew over. i was flying over flat land. there was wind has i explained earlier but it was just a breeze with the wind hardly moving the trees by me. the drone flew well minutes earlier on one battery and went crazy on the second.

Suren Posted at 2017-12-12 02:47
hi, please find flight log as requested.

http://www.phantomhelp.com/logviewer/MK3XJDBJHVWNH3VA3SK1/

Hi Suren, looking at your logs as Kloo gee said when your aircraft went into RTH wind was your problem. Although Kloo mentions 22mph the reality is you were within 100 metres of home so Aircraft speed is curtailed to 14mph and if wind for the day was 16mph then it is to strong to make any headway. Your Aircraft did go into auto landing and even then was loosing some ground from there it went into Forced Landing at .3 of a metre as it should do and the landed.
There is nothing peculiar about your flight , you could have canceled RTH and tried to fly back in sport mode .
You said you used a fresh battery but your log shows battery at 75%, the reason for negative altitude reading is due to homepoint being above the area you landed in.

Looking at your coordinates it shows the ground you flew over and it looks like there is a drop in the ground.

Suren Posted at 2017-12-13 04:13
http://www.phantomhelp.com/logviewer/GOXPCH6BB0RFB7Q2WXET/

this is the link that has the log file for when the spark went mad

In this log there is no sign of spark giving any problems.

Wachtberger Posted at 2017-12-18 09:24
"uneducated, non-expert"
Aren't you slightly understating here? ;-) Nobody will believe it anyway

Haha, thanks for the positive reinforcement!  Ego boosts are always appreciated!   

But seriously, I feel like there is always something to be learning.....