Welcome Mavic Pilot!
Jump in and join our free DJI Mavic community today!
Sign up

Mavic 2 pro lost

Droneshot

Active Member
Joined
Dec 22, 2018
Messages
34
Reaction score
110
Last week I was flying at sunset on a mountain top over a hour away. The drone was only about 545 feet away and in clear sight of me. I was just moving around a little taking pictures, the last few just looking straight down. There are no homes or power lines for miles from where I was and the top of the mountain top where I was didn't have any trees around and was the highest point in the area. I had two warnings pop up and only was able to read one that said something about not blocking the antenna when I was in plane view of the drone. I heard the sound of the drone rpm speed up then go silent and then got a disconnect on the controller. At that point I tried to reconnect and figured the drone would return to home and it never did. It was getting to dark and late to go far to look very much for it. I went back three times looking for it with the find my drone on the DJI app. I was way above anything in the area. I have given up and now shopping for another Mavic 2 Pro drone. I had over thirty hours of flying time on that drone without any issues. I have a Phantom 4 Pro so at least I'm not grounded completely but really loved the Mavic. I'm not sure if this is what someone needs to maybe give me a idea of what happened DJI Flight Log Viewer - PhantomHelp.com . Thanks for any help or ideas
 
  • Wow
Reactions: Skywatcher2001

Meta4

Well-Known Member
Joined
Oct 30, 2016
Messages
4,286
Reaction score
4,669
Age
64
Last week I was flying at sunset on a mountain top over a hour away. The drone was only about 545 feet away and in clear sight of me. I was just moving around a little taking pictures, the last few just looking straight down. There are no homes or power lines for miles from where I was and the top of the mountain top where I was didn't have any trees around and was the highest point in the area. I had two warnings pop up and only was able to read one that said something about not blocking the antenna when I was in plane view of the drone. I heard the sound of the drone rpm speed up then go silent and then got a disconnect on the controller. At that point I tried to reconnect and figured the drone would return to home and it never did. It was getting to dark and late to go far to look very much for it. I went back three times looking for it with the find my drone on the DJI app. I was way above anything in the area. I have given up and now shopping for another Mavic 2 Pro drone. I had over thirty hours of flying time on that drone without any issues. I have a Phantom 4 Pro so at least I'm not grounded completely but really loved the Mavic. I'm not sure if this is what someone needs to maybe give me a idea of what happened DJI Flight Log Viewer - PhantomHelp.com . Thanks for any help or ideas
The flight data shows the drone 375 feet up and 550 feet south of the home point.
It is facing east and flying south at full speed when the data just stops.
The pitch, roll and yaw data shows no sudden change that would indicate a collision.
This suggests a sudden complete loss of power.
I heard the sound of the drone rpm speed up then go silent and then got a disconnect on the controller.
The most likely explanation for this is that you pushed the right stick fully towards the right at 10:11.2.
The last line of recorded data shows the right stick suddenly centred.
Did you do that?
It was getting to dark and late to go far to look very much for it. I went back three times looking for it with the find my drone on the DJI app
Find my Drone can only show where the drone was last recorded - not where it crashed after a loss of power.
Where it was last recorded, it was 375 feet higher than the launch point and moving south at 27 mph.
It will have continued moving further south as it fell to the ground.
@sar104 might be able to calculate a likely crash site location from the data.
 

PhantomFandom

Well-Known Member
Joined
Jan 1, 2019
Messages
336
Reaction score
527
I see battery voltage drop as it should during a flight. However, why does the battery percentage not change at all? It shows 84% from power up through the entire 10 minute flight.
 

sar104

Dic mihi solum facta, domina.
Premium Pilot
Joined
May 27, 2017
Messages
8,645
Reaction score
9,608
Location
Los Alamos, NM
I see battery voltage drop as it should during a flight. However, why does the battery percentage not change at all? It shows 84% from power up through the entire 10 minute flight.
Which data are you looking at? The smart battery remaining percentage (blue trace) is dropping appropriately. It ends up around 50%:

Battery.png
 

Droneshot

Active Member
Joined
Dec 22, 2018
Messages
34
Reaction score
110
First I would like to thank those who have looked at my data and given input on what happened. I walked a grid for three or four hours all around the area where it was suppose to be with no luck. More than likely it's up in one of the large pine trees. We had a early winter storm yesterday and probably buried in snow on the mountains right now and not even able to get back to the area.. The last input that I remember giving the drone was moving sideways to get a straight down shot of the trees. There was no wind or birds as it was just about to get dark when I lost it. Do you think the battery could have popped out to just loose all data while in air. I always recharge after batt is cooled when I get home and have never noticed swelling of any of my batteries. Thanks again
 

Droneshot

Active Member
Joined
Dec 22, 2018
Messages
34
Reaction score
110
The flight data shows the drone 375 feet up and 550 feet south of the home point.
It is facing east and flying south at full speed when the data just stops.
The pitch, roll and yaw data shows no sudden change that would indicate a collision.
This suggests a sudden complete loss of power.

The most likely explanation for this is that you pushed the right stick fully towards the right at 10:11.2.
The last line of recorded data shows the right stick suddenly centred.
Did you do that?

Find my Drone can only show where the drone was last recorded - not where it crashed after a loss of power.
Where it was last recorded, it was 375 feet higher than the launch point and moving south at 27 mph.
It will have continued moving further south as it fell to the ground.
@sar104 might be able to calculate a likely crash site location from the data.
Last I remember I was moving sideways to get a picture looking straight down into the trees when it disconnected. There is no way that I ran into anything as I was way above the trees from the home point and the mountain dropped off from where I was flying so would have been even higher where I lost it. The air was calm and not a bird in sight as it was almost dark. Thanks for your input.
 

Droneshot

Active Member
Joined
Dec 22, 2018
Messages
34
Reaction score
110

PhantomFandom

Well-Known Member
Joined
Jan 1, 2019
Messages
336
Reaction score
527
Which data are you looking at? The smart battery remaining percentage (blue trace) is dropping appropriately. It ends up around 50%:

View attachment 82627
My apologies. I did not look at the raw data, but went to the table presented at PhantomHelp. The column for "Battery" shows 84% from start to finish. I guess it was just a problem with PhantomHelp interpreting the logs?
 

sar104

Dic mihi solum facta, domina.
Premium Pilot
Joined
May 27, 2017
Messages
8,645
Reaction score
9,608
Location
Los Alamos, NM
My apologies. I did not look at the raw data, but went to the table presented at PhantomHelp. The column for "Battery" shows 84% from start to finish. I guess it was just a problem with PhantomHelp interpreting the logs?
Probably. @msinger's converter is pretty robust, but occasionally I've noticed odd artifacts in the tabular data.
 

ChrisOutdoors

Well-Known Member
Joined
Jun 27, 2019
Messages
258
Reaction score
237
What was the temperature at the time of loss? Lithium cells do not like really cold temps.
 

Droneshot

Active Member
Joined
Dec 22, 2018
Messages
34
Reaction score
110
What was the temperature at the time of loss? Lithium cells do not like really cold temps.
It was in the mid 70's but we just had a big cold front that dumped snow and freezing rain. It was beautiful out when it happened and I was in a t shirt.
 

tribar

Well-Known Member
Joined
Dec 27, 2016
Messages
57
Reaction score
37
Age
59
I see battery voltage drop as it should during a flight. However, why does the battery percentage not change at all? It shows 84% from power up through the entire 10 minute flight.
I saw exactly that in another topic (also 84%):
 

DanMan32

Well-Known Member
Premium Pilot
Joined
Sep 1, 2018
Messages
5,193
Reaction score
1,829
Age
53
What was the temperature at the time of loss? Lithium cells do not like really cold temps.
Unless it was drastically cold, he had been operating long enough to have kept the battery sufficiently warm.
 

sar104

Dic mihi solum facta, domina.
Premium Pilot
Joined
May 27, 2017
Messages
8,645
Reaction score
9,608
Location
Los Alamos, NM
Unless it was drastically cold, he had been operating long enough to have kept the battery sufficiently warm.
And, in any case, the battery was performing normally until the sudden failure.
 

DanMan32

Well-Known Member
Premium Pilot
Joined
Sep 1, 2018
Messages
5,193
Reaction score
1,829
Age
53
Which is pretty much why I was saying cold wasn't a factor. It was already running long enough that battery was at normal operating temp.
 
  • Like
Reactions: sar104

thinglenn40

Member
Joined
Nov 26, 2017
Messages
11
Reaction score
10
Age
58
Sorry for your loss! Lost my Mavic 2 Pro and the tip of my thumb! But it was totally my fault!