Why did it crash?

[NLarson801]

Last night I wanted to test out a shot involving a car driving under the drone as it hovered in place. I did not have anyone with me so I placed the drone in the air with plenty of clearance above the road and used tripod mode to try to make the Mavic still. I hit record on the controller and set it on the passenger seat and then drove quickly down the road. As I returned to where I left the Mavic I could not see it anymore so new it had somehow flown off. It was only after reviewing the footage on my phone that I saw what had happened.

the first video is of the car driving down the street, you can see after the car passes under the Mavic starts to fly backwards for some reason. The 2nd video is a continuation and shows it clipping the tree and luckily landing in some grass from not too high of a height.

I know that I should have been watching the phone screen, but I figured it would be fine since it was in tripod mode and had GPS signal.

 

[msinger]

Please upload your TXT flight log here and post a link back here. You'll find instructions for locating your TXT flight log at that link.

 

[RobP62]

Last night I wanted to test out a shot involving a car driving under the drone as it hovered in place. I did not have anyone with me so I placed the drone in the air with plenty of clearance above the road and used tripod mode to try to make the Mavic still.

Yea, can't wait to hear the pro explanation on this. I plan on using tripod mode a lot around my pool at parties so I'm really interested in why this happened.

I hate when things go wrong but I try to read all these posts to learn from them.
Thanks,
Rob

 

[NLarson801]

Phantom Log Viewer - PhantomHelp.com

looks like it lost GPS connection for some reason.

 

[erkme73]

Phantom Log Viewer - PhantomHelp.com

looks like it lost GPS connection for some reason.

The GPS position no match is after it landed upside down. What ever happened, occurred well before those errors.

 

[msinger]

Your flight shows the right stick was in the full down position. That caused the Mavic to fly backward.

 

[NLarson801]

Your flight shows the right stick was in the full down position. That caused the Mavic to fly backward.

I guess it's possible the stick got bumped when I accelerated, but it was just sitting on the passenger seat.

 

[msinger]

It seems it got bumped to the full down position and then was held in that position until the Mavic crashed.

 

[NLarson801]

It seems it got bumped to the full down position and then was held in that position until the Mavic crashed.

Where in the log file do you see the position of the sticks?

 

[msinger]

Where in the log file do you see the position of the sticks?

Go here and click the "Download CSV" link. You can find the stick positions in that file. Here's a diagram explaining what the values mean in the log:

 

[Kilrah]

Yup the right stick got bumped and gave full back/slight left order all the way. Controller probably rolled on the seat during acceleration...

Could have been magnetic effect on the stick too.

 

[NLarson801]

Thanks guys, this is good info.

 

[TrayBoz]

Sorry for your crash. I know that really sucks. There is a part of me though that is always relieved when I read these threads and find that a crash was because of human error, instead of mavic malfunction, which is most of the time luckily.

 

[mkp2020]

So are we thinking the controller with phone got placed upside-down on the passenger seat? Otherwise I can't quite see how the stick could be held in that position.

 

[ibatman]

Man, you need a friend hopefully there isn't that much damage.

 

[JOHNNYBRAVO]

So thankful for the Pros on here. Thanks guys

 

[dacofty]

Looks like a clipped a limb

 

[NLarson801]

So are we thinking the controller with phone got placed upside-down on the passenger seat? Otherwise I can't quite see how the stick could be held in that position.

It wasn't upside down, but the controller may have slid and hit the right stick back. I honestly didn't think it did, but according to the data it is saying it did. I was wondering if somehow the accelerometer on the phone caused it, but that doesn't seem to do anything.