Thanks for the explanation, I was rather surprised that you would fly along and over a busy road like that.
I did notice a twitch in the drone/camera at the 18sec mark, could that be related to the final failure?
I Just lost my Mavic 3
- Thread starter zeusfl
- Start date
I did notice a twitch in the drone/camera at the 18sec mark, could that be related to the final failure?
Yaros
Well-Known Member
I don't know, looks like a bird strike to me, and then a prop failure.
I think that what may have happened is that a bird attacked it, got scared and flew away, the propeller got damaged by the bird and broke in half, the drone flipped again and fell. Something like this happened to me with an old drone when I was flying along the beach.
Only because you can't see the bird in the video doesn't mean it wasn't there
I think that what may have happened is that a bird attacked it, got scared and flew away, the propeller got damaged by the bird and broke in half, the drone flipped again and fell. Something like this happened to me with an old drone when I was flying along the beach.
Only because you can't see the bird in the video doesn't mean it wasn't there
Pretty sad if you can't find it. I am still seeing a lot of issues with the M3's as though they weren't ready for release yet. I use a Marco Polo transmitter stuck to me drone just in case of things like this. They are expensive but are self contained and don't rely on any cellular or satellite signal. Good Luck
Chiuki
Active Member
I've had many bird strikes, and this looks different. Like either the motor fell off, or was shot off. Is it possible someone shot it down?
I say that because there was an initial hit like the motor or arm was shot off, then another where the camera/gimbal was taken out. When a hawk or raptor has hit my M2P, at some point it appears and the sensors warn of an approaching object. This didn't look like that.
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@Chiuki, somebody would have to have been one hell of a good shot to hit that drone at that altitude and speed. We have so many guns here because we do not focus on accuracy. : )
Well this thread rapidly degenerated into fantasy. When will people learn that dreaming up convoluted scenarios involving birds/guns is not a useful substitute for looking at the data.
The first thing to note, as mentioned a few times, is that there was an initial loss of control at 735 seconds, lasting around one second, involving a roll to the left, pitch forwards, and rapid CCW rotation. It then stabilized briefly before losing control again. Looking at that in pitch/roll/yaw space:
These data agree well with the video cache frames at the end of the flight, which generally rules out IMU failure.
In terms of velocity:
The only somewhat discontinuous change in velocity is 2.5 m/s to the west (aircraft right) recorded at 735.4 seconds. If that were due to a collision then to get CCW rotation and pitch down it would need to have been from below and left nearer the rear of the aircraft, but that would have resulted in right roll, not left roll. It doesn't look like a collision.
Without motor speed data it's impossible to draw any firm conclusions, but I would suspect a front left ESC problem, partial recovery, then failure. That would be a warranty issue, possibly even if you cannot recover the aircraft.
The first thing to note, as mentioned a few times, is that there was an initial loss of control at 735 seconds, lasting around one second, involving a roll to the left, pitch forwards, and rapid CCW rotation. It then stabilized briefly before losing control again. Looking at that in pitch/roll/yaw space:
These data agree well with the video cache frames at the end of the flight, which generally rules out IMU failure.
In terms of velocity:
The only somewhat discontinuous change in velocity is 2.5 m/s to the west (aircraft right) recorded at 735.4 seconds. If that were due to a collision then to get CCW rotation and pitch down it would need to have been from below and left nearer the rear of the aircraft, but that would have resulted in right roll, not left roll. It doesn't look like a collision.
Without motor speed data it's impossible to draw any firm conclusions, but I would suspect a front left ESC problem, partial recovery, then failure. That would be a warranty issue, possibly even if you cannot recover the aircraft.
LeeHene
Member
For what it's worth, I too think it looked kinda like a motor or ESC failure. It seems the fact that it certainly DID somewhat stabilize very briefly before spiraling would rule out prop failure, yet it's obvious the flight controller WAS trying to compensate for something.
So sad. Best wishes for getting a full replacement from DJI.
So sad. Best wishes for getting a full replacement from DJI.
Chiuki
Active Member
*wasn't intending to drag this thread down into the non-factual world with my fantasy comments so I'll refrain from contributing to this forum in the future.
I truly hope you find your drone and can get some answers as to what happened so as to possibly prevent a future loss or repeat. If I were there, I would help you search for it in the woods and swamp.
Good luck, man.
I truly hope you find your drone and can get some answers as to what happened so as to possibly prevent a future loss or repeat. If I were there, I would help you search for it in the woods and swamp.
Good luck, man.
peterc4
Well-Known Member
0Kajuna0
Well-Known Member
I ran your log through FlightReader which revealed several messages throughout your flight concerning communication problems between your controller and the drone, image transmission troubles between the drone and your controller, and aircraft in the area. Perhaps you had signal blockage when flying low and far away? Good luck finding your drone; I'm sorry for your loss.
Nice functionality with the overlayed data, but the data are not just "not exactly" in sync - it's not even close. The displayed telemetry for the event doesn't start until after the video feed has ended.
I just expend 6 hours trying to find the drone and nothing. I made a mapping mission with my Mavic Air 2 using Dronelink and I am processing the mapping pictures now.
I do. But but the deductible is $800 if I cant find the drone. I do not want to pay if was a DJI fault.
0Kajuna0
Well-Known Member
Right. It's in the black section of the video. I could move the corrupt bits of the video there manually and re-sync them with the data if that adds anything useful.
See my signature
That would be good - if it's not too much work. It might help @zeusfl with DJI too, if they don't initially find anything conclusive in the logs.
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