Mavic totalled while using Litchi

[tpop24]

Have had my Mavic for a few weeks and have been using Litchi almost exclusively. I love the fpv feature. I have been working with waypoints and increasingly becoming bolder on the length and intricacy. I know about the line of site rule but stupidly tried to push it's limits. I plotted a flight with a total flight distance of 9242 ft. with a 9 min flight time. Altitude was set at a minimum of 95ft. well above any obstacles. I was flying with goggles and couldn't see the signal strength but was confident the Mavic would finish its mission. Video started breaking up and I decided to RTH. (RTH is above any obstacles) No response, lost video and connection jumped in my car and headed towards it, never reconnected. Searched 15 min then found it along side parking lot about 200 yards from last point seen in Litchi. It is toast. Camera broken. Arms bent landing gear broke

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[tpop24]

Had it set to auto record but last video won't play

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[tpop24]

Flight log. HealthyDrones.com - Innovative flight data analysis that matters

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[tpop24]

Any ideas what happened?

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[james_mav]

Any ideas what happened?

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Someone crashed using Litchi the other day when the drone went up to 400 meters or so after hitting RTH eventhough the RTH setting were much lower on the DJI app & then it fell out of the sky when it didn't have enough battery power left to land.

 

[tpop24]

I was only 4min into the flight. Started with a full battery. Found the crashed Mavic less than 20 min after takeoff. Battery still shows 3 lights. It was thrown about 20ft from Mavic.

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[Logger]

Hit a power line perhaps.
Had it continued enroute from the previous WPT? By this I mean, does where you found it suggest it was still continuing along your Litchi WPT route when it crashed - or do you think it had it spun around and started flying the RTH?

Does it power on? If so you should pull the logs with DJ Assistant. Then it will be pretty obvious if you hit something.

My bet is it collided with something. A wire from those silos or old water tower perhaps?

 

[tpop24]

The point I found it could indicate continuation along the route or a direct RTH from the last point seen.

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[tpop24]

No wires or anything over about 60 ft where I found it. Are the dji log files more in-depth than healthy drone?


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[tpop24]

It does power on. Never used DJI assistant, will have to do some research on it.

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[theone29]

Are you getting it fix? I am interested in the controller if you are parting it. Sorry about your crash.

 

[R24fran]

This is why people need to learn how to handle these things. If we don't all start being responsible we WILL lose our privilege and this will all just be a dream that could have happened. Don't fly outside the FAA requirements. They made them for a reason


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[Logger]

No wires or anything over about 60 ft where I found it. Are the dji log files more in-depth than healthy drone?

Yes way more so. HD only logs what is sent back to the RC and Litchi during the flight when there is a sginal. It has NFI what is going on during signal loss periods. The on aircraft DJI DAT file captures all the onboard info which is far more detailed.

This might not describe the latest version but will give you the gist of how to extract it
How to retrieve a .DAT

Once you get the dat file you can post it up somewhere like GDrive or dropbox and there are knowledgeable people around here who will be able to tell you exactly what went on.

 

[Logger]

No wires or anything over about 60 ft where I found it.

What about if you hit RTH at an inopportune time and it clipped something like this, then flew on some and crashed.

https://www.google.com.au/maps/@30....4!1sI7ZJ90PBf9jUyhgldl5Obw!2e0!7i13312!8i6656

 

[tpop24]

I'm at a loss, anything is possible.

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[tpop24]

I thought I had the bases covered with enough altitude to avoid any obstacles. I had tested Litchi waypoints several times on a smaller scale and it performed flawlessly. Everything was up to date, batteries charged, I thought I was ready This was my first big test, kinda pushing the limits to see what it can do before I head to the beach and get out over the water. Hindsight being 20/20...

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[Strafe1]

I hope I am not out of place commenting on an app I have no familiarity with. I saw a video of an experienced Litchi app waypoints user explain how his quad crashed because he had altered (removed in this case) the number of waypoints after his initial programming and that as the program updated the new waypoints, some of the altitudes had changed. Fortunately, no damage was done and he was able to keep flying. He had to go in and reset some of the altitudes to compensate for the removed waypoints. I don't know if this is related.

 

[BudWalker]

Have had my Mavic for a few weeks and have been using Litchi almost exclusively. I love the fpv feature. I have been working with waypoints and increasingly becoming bolder on the length and intricacy. I know about the line of site rule but stupidly tried to push it's limits. I plotted a flight with a total flight distance of 9242 ft. with a 9 min flight time. Altitude was set at a minimum of 95ft. well above any obstacles. I was flying with goggles and couldn't see the signal strength but was confident the Mavic would finish its mission. Video started breaking up and I decided to RTH. (RTH is above any obstacles) No response, lost video and connection jumped in my car and headed towards it, never reconnected. Searched 15 min then found it along side parking lot about 200 yards from last point seen in Litchi. It is toast. Camera broken. Arms bent landing gear broke

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Can you provide the .csv log file that Litchi produces? Not the HD .csv file, but the original .csv log that was submitted to HD.

 

[tpop24]

Hi,

Here's the link to the file:

https://1drv.ms/x/s!AjMALoFHkqmdmEvZw_OaY8nalimd

Shared from Excel for Android
https://office.com/getexcel

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[BudWalker]

Hi,

Here's the link to the file:

https://1drv.ms/x/s!AjMALoFHkqmdmEvZw_OaY8nalimd

Shared from Excel for Android
https://office.com/getexcel

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I managed to extract a .csv from the link you posted. There wasn't anything indicating the cause of the incident. The .DAT will show any high acceleration events that would happen if the Mavic ran into something.

There is one question though. In the final 75 seconds of flight there were 3 pitch up/pitch down events. Since the Mavic was being controlled by a mission those events would have had to been programmed into the mission. Is this correct?