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Drone lost in the Aegean Sea—Cause?

Liny

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Hi. I lost my mavic2pro yesterday in Greece. I have attempted to attach the flight logs. The battery acted a little janky previously and I had another battery a few months ago short out and stop working while landing. Any thoughts on cause? Thanks.

I was about 3 mins into flight not far offshore and I got a message—Aircraft Disconnected. I waited to see if it would RTH but it did not.
 

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Meta4

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Your flight data doesn't give away many secrets.
You launched with a full battery, flew up and out.
And at 135.3 seconds the data just stops, with the battery still good, no extreme movements, no indications of a collision.
It looks like a case of sudden loss of power.
Was the battery at all swollen?
 

StantonZ

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Thank you. Nope not at all. Do you think it’s worthwhile seeing if DJI will do anything?
It would be...if you could send them the battery (which I assume is impossible).
I have to say I'm very concerned about all the M2P (and M2) "sudden loss of power" postings I see, because that means there are even more (older) battery packs out there that could potentially fail. Would be interesting to know what/how they improved the MA2/MA2S packs, because they obviously have performed well enough to continue using the exact same design.
 
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Meta4

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Thank you. Nope not at all. Do you think it’s worthwhile seeing if DJI will do anything?
Without the drone, I wouldn't expect much, but it doesn't hurt to try.
 
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Liny

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It would be...if you could send them the battery (which I assume is impossible).
I have to say I'm very concerned about all the M2P (and M2) "sudden loss of power" postings I see, because that means there are even more (older) battery packs out there that could potentially fail. Would be interesting to know what/how they improved the MA2/MA2S packs, because they obviously have performed well enough to continue using the exact same design.
I can’t send the battery. What’s the best way to contact them.
 

PhiliusFoggg

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I can pay $65 for them to Read the flight logs
Sorry about your drone.

$65 for something that quite a few on here do for free ??????? and, I assume, they are not talking about the DAT on the drone since that is, presumably, 'fishfood'.
Just as a matter of interest what was your reponse?
 

slup

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...Any thoughts on cause? Thanks.
Yeah ... this is very likely a dislodged battery causing a sudden power loss.

At 135,3sec you releases a full aileron stick which had driven up your M2P to 9,3m/s which required a positive roll of approx 34 degrees. Just 0,1 sec after the stick release (blue dotted graph) the log ends ... probably a fast negative counter roll to break broke the battery lose (sudden swelling weaken the attachments) & that cut the power.

1628030844893.png

Did you have anything attached to your craft ..?

1628030873559.png
 

Liny

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Sorry about your drone.

$65 for something that quite a few on here do for free ??????? and, I assume, they are not talking about the DAT on the drone since that is, presumably, 'fishfood'.
Just as a matter of interest what was your reponse?
Sorry about your drone.

$65 for something that quite a few on here do for free ??????? and, I assume, they are not talking about the DAT on the drone since that is, presumably, 'fishfood'.
Just as a matter of interest what was your reponse?
Something like I’m pissed but it really didn’t matter. She’s like that is the policy and there is nothing I can do
 

Liny

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Yeah ... this is very likely a dislodged battery causing a sudden power loss.

At 135,3sec you releases a full aileron stick which had driven up your M2P to 9,3m/s which required a positive roll of approx 34 degrees. Just 0,1 sec after the stick release (blue dotted graph) the log ends ... probably a fast negative counter roll to break broke the battery lose (sudden swelling weaken the attachments) & that cut the power.

View attachment 132781

Did you have anything attached to your craft ..?

View attachment 132782
I did not. That was perplexing to Me too.
 

Liny

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Thanks for all of the replies. This helps and makes me feel vindicated although I need to pay attention to battery swelling. I did check my remaining battery and there is no swelling.

is there a thread on air v pro?
 
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Macabre

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**** that sucks, M2Pro gone. But wasn't it extremely hot lately in Greece? Might be the reason for batteries to fail.
 
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