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Possible fly-away/insect impact?

JCLeigh99

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Hello,
I'm new to this forum but just want some advice before I either go through insurance or get in touch with DJI.

I bought a DJI Flip about 4 months ago. I've flown the drone almost 30 times now and I've not encountered any issues whatsoever - I bought it to go travelling so did some practice flights in the UK before taking it with me to South East Asia.

Anyway, fast forward a bit and I'm getting ready to capture some footage over the lovely beaches on the island of Koh Rong in Cambodia, when, all of sudden after about 30 seconds of flying, I get a bunch of warnings saying sensor error - the drone banks and spins to the right before gradually descending into the sea, completely uncontrollable. I was at a height of about 100ft and over the sea a bit so away from any nearby trees or other obstacles, there was very little wind that day but when the sensors played up, I was suddenly told that there was a strong wind warning just as the sensor errors occured so I'm assuming they're related.

Having checked the logs, earlier in the flight I was switched to attitude mode due to lack of GPS signal (unsurprising given the location) and had an error about a slow SD card, but the flight was completely normal until that point. The footage of the crash shows me flying completely normally until it suddenly spins off to the right hand side, turning about 90 degrees before banking hard to the right and gradually descending into the sea, despite my inputs on the controls countering the movement entirely.

I recovered the drone and found several spokes on both right props had been snapped, so my assumption is I must've hit a bird/insect, most likely one of the ridiculously big beetles or wasps that I keep see flying about. I don't recall seeing many birds around as it was the middle of the day in peak heat and I can't see anything like that in the footage. Although it is recovered, salt water has completely fried everything and as it took over an hour to recover I think my chances of reviving my Flip are long gone unfortunately :(

So essentially I guess what I'm asking is: does this sound like a collision with an insect/bird or is this a random runaway incident? And depending on the answer to this, who am I best contacting in either scenario, DJI or Cover drone (my drone insurer)?

TLDR; my drone became uncontrollable mid-flight, away from obstacles and crashed into the sea. Logs show sudden sensor failure, followed by spin and crash. Recovered drone has damaged spokes on both right props. What is most likely cause and who should I contact, DJI or insurer?
 
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Greetings from Birmingham Alabama USA: welcome to the forum! We look forward to hearing from you!

Sorry to hear about your lose. Did you have a good GPS lock before taking off?
 
Having checked the logs, earlier in the flight I was switched to attitude mode due to lack of GPS signal (unsurprising given the location)
??
If you were 100 ft over the sea, why would losing GPS be unsurprising?
and had an error about a slow SD card,
That has no impact on flight.

So essentially I guess what I'm asking is: does this sound like a collision with an insect/bird or is this a random runaway incident?
As usual, the recorded flight data is needed to tell what happened.

To post your flight data there are a couple of options ...

1. Go to DJI Flight Log Viewer | Phantom Help
Follow the instructions there to upload your flight record from your phone or controller.
That will give you a detailed report on the flight data.
Come back and post a link to the report it provides and someone might be able to analyse it and give you an understanding of the cause of the incident.
or
2. Just post the .txt file here
or
3. If you use Airdata, you can view the flight data on Airdata and post a link for the Airdata report
 
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The flight logs will tell you for sure probably BUT my guess..The sun and water did it to you.
Question: How did you apply and receive your permits to fly in Cambodia? the question has been asked here before and most requests by tourist get denied from what I understand, is this not the case?
 
Better yet ... how about explaining the way you think that the sun and water caused the incident.

I've been flying in the sun and over water and investigating drone incidents for more than 10 years and know of no way that the incident described could be related to the vague concept you've suggested.
 
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I have been Driving Down the Grapevine at 95 MPH for 10 years now without being pulled over, That doesnt mean the general public wont get a ticket, it just means I'm Lucky. Just because it doesnt happen to you doesnt mean its not a real problem.
DJI Drones just like any Drone with a sensor suffer from what is called "GLINT" Glint occurs when the sun reflexes on a shiny surface such as water. Please reference the study below:
If you would like more DATA there are many very good articles on this phenomenon this article just shows how the issue is more obvious in high tech sensors.
perhaps you are doing something the engineers and researchers have missed.
It happens...and the problem is real,Dismiss it if you wish, It won't happen every time you fly over water, and maybe just maybe never, but it certainly CAN happen don't fool yourself.
 
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DJI Drones just like any suffer from what is called "GLINT" Glint occurs when the sun reflexes on a shiny surface such as water. Please reference the study below:
That article deals the effects on imagery when sunlight reflects (not reflexes) off the surface of the water. The concern is loss of image information below the surface..

"Sun glint presents a significant challenge in marine ecological remote sensing by obscuring valuable features of benthic communities, thus hindering accurate monitoring of these communities. "

Benthic refers to things on or attached to the bottom of a body of water.

I can't see how degraded images could affect the operation of a drone 100' above the surface, or lower.
 
I can't see how degraded images could affect the operation of a drone 100' above the surface, or lower.
The article is about the sensors and lenses they use in their research, and the complications of Sun "Glint" that occurs. Just as sun "Glint" is effecting them it effects your Drones Sensors. Drive down the road aways and then let a friend hold a mirror into your face till the sun is in your eyes...Hows your driving now?
MORE? I got em.
 
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You didnt read or understand the article my apologies please read the others. You have yet as to explain why DJI sensors don't suffer from the same problems as others PLEASE oh please enlighten us.
Somehow I expect a short "no you do it" answer.
You know.....Somehow this sensor thing really gets your goat huh? Calm down dude it happens maybe it didnt happen this time who knows......Only you apparently :rolleyes:
 
DJI Drones just like any Drone with a sensor suffer from what is called "GLINT" Glint occurs when the sun reflexes on a shiny surface such as water. Please reference the study below:
I missed the part in that journal article explaining why they lost control of their drone.
I missed it because the paper isn't about drones crashing at all.
It's about the difficulty shooting high quality images through sun glare on the water's surface.
If you would like more DATA there are many very good articles on this phenomenon this article just shows how the issue is more obvious in high tech sensors.
To suggest that problems getting good imagery shot through sun's glare on the water's surface could somehow cause a drne to fall from the sky is just bonkers.
It happens...and the problem is real ....

Dismiss it if you wish, It won't happen every time you fly over water, and maybe just maybe never, but it certainly CAN happen don't fool yourself.
You are the one that's fooling yourself.
The scenario you've suggested exists only in your imagination.
It's never happened and can't possibly happen.
 
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The article is about SENSORS AND SUN GLINT I am sorry if you cannot take info from one subject matter and apply it to another. I am not paid to explain subjects and facts you want to refute, I can only suggest that that may have been the problem but you already know what occured perhaps you could tell me and the OP.
If I used airplanes to explain the aerodynamics of cars would that confuse you?
I'm out good luck OP Fly safe.
 
You didnt read or understand the article my apologies please read the others. You have yet as to explain why DJI sensors don't suffer from the same problems as others PLEASE oh please enlighten us.
Again, from the article you referenced.

"Sun glint presents a significant challenge in marine ecological remote sensing by obscuring valuable features of benthic communities, thus hindering accurate monitoring of these communities. "

Benthic refers to things on or attached to the bottom of a body of water. The article is about not being able to see things below the surface of the water well. Yes, all optical cameras, including DJI's, will be affected by glare or glint on the surface of the water, impairing the quality of sub-surface images. The article makes no suggestion that glare or glint might affect remote sensing equipment, including drones.
 
You didnt read or understand the article my apologies please read the others. You have yet as to explain why DJI sensors don't suffer from the same problems as others PLEASE oh please enlighten us.
Somehow I expect a short "no you do it" answer.
You know.....Somehow this sensor thing really gets your goat huh? Calm down dude it happens maybe it didnt happen this time who knows......Only you apparently :rolleyes:
DJI_0299a-XL.jpg
I guess my drone should have fallen from the sky because the detail in bottom left is obscured by glare on the water.
I've never heard anything so stupid.

Come back sometime when you are sober.
There's no point discussing anything with someone apparently stoned out of his mind.
 
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DJI_0299a-XL.jpg
I guess my drone should have fallen from the sky because the detail in bottom left is obscured by glare on the water.
I've never heard anything so stupid.

Come back sometime when you are sober.
There's no point discussing anything with someone apparently stoned out of his mind.

Reminds me of Up In Smoke, but in the OP's case, down...down...down...

😂😁🚭🚭😁😂
 
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Another case of speculation that may be laid to rest with the flight logs. I note that the OP has been conspicuous by his absence. If he reads this, please give us some real data for the experts to work on!
 
I have been Driving Down the Grapevine at 95 MPH for 10 years now without being pulled over, That doesnt mean the general public wont get a ticket, it just means I'm Lucky. Just because it doesnt happen to you doesnt mean its not a real problem.
DJI Drones just like any Drone with a sensor suffer from what is called "GLINT" Glint occurs when the sun reflexes on a shiny surface such as water. Please reference the study below:
If you would like more DATA there are many very good articles on this phenomenon this article just shows how the issue is more obvious in high tech sensors.
perhaps you are doing something the engineers and researchers have missed.
It happens...and the problem is real,Dismiss it if you wish, It won't happen every time you fly over water, and maybe just maybe never, but it certainly CAN happen don't fool yourself.
Read through the linked article... "...surface glint..."??? I actually wondered what the hell the writer meant.

Do you think whoever wrote it meant 'specular reflection'?... that well known effect that can be countered or lessened significantly by using a cheap polarising filter.

And "...benthic communities..." - that's a howler, perhaps he/she thought it sounded more academic than "sea life".
 
The article is about the sensors and lenses they use in their research, and the complications of Sun "Glint" that occurs. Just as sun "Glint" is effecting them it effects your Drones Sensors. Drive down the road aways and then let a friend hold a mirror into your face till the sun is in your eyes...Hows your driving now?
MORE? I got em.
And regarding the idea that strong directional light or specular reflection can cause odd behaviour in drones: this is not without precedent.

The Autel Nano+ was a bugger for this - as demonstrated in quite a few real-time Youtube videos from credible sources... one that immediately springs to mind being 'Ian from London'.

I've also had first hand experience of what is shown in the videos, where the Autel Nano+ I owned would suddenly stop dead mid-flight, or swerve quite violently with no apparent reason and without additional stick input.

Giving some thought to these occurrences, the only common denominator I could identify was the position and intensity of the sun... Golden Hour... at certain angles presumably causing a snap (specular) reflection off the glass cover shielding the forward sensor, which the drone must have interpreted as a sudden, unexpected obstacle then acted as per programmed O/A response.

Following this line of thought, it isn't that much of a stretch to see how a sharp specular reflection from water might trigger a similar response... especially when the drone is close to the source (less than 100 feet above the reflecting surface).

It might be an interesting experiment to see if a similar O/A response could be triggered on a bright, sunny day by someone on the ground flashing a mirror up onto the front of an O/A capable drone from various angles.
 

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