Alari
lvl.2
Offline
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Hi,
After 3 months, 23+km distributed over 50 flights with flawless operation, my drone went beserk today
What makes it extremely sad for me, is that I've taken such great care of the drone and kept it completely clean and scratch free, now it's cosmetically not the prettiest looking.
So, I set everything up, as usual, turned the controller and drone on, let it warm up, and get good GPS signal and home point. As soon as I lifted up, the drone started drifting sideways, so i compensated a little bit, and at first didn't think much of it (maybe wind), until a second later, when it started drifting way more and seemed to be gaining speed (accelerating) I still had control with the controller, so I made it go higher, so it would go above our heads, and not through them, and when I saw there was no chance of regaining control, i came as low as I could, so a wooden fence would stop it near us, and not have the drone go even faster into the unknown, or into the sea/harbor (300-400 meters from us) and initiated the emergency cut motors command before it hit the fence, and seemed to save my propellers.
After that, when gathering all the pieces and reassembling everything, i tested if the drone works (safe area, low altitude) and it did, but seems not to be as stable as it used to.
The logs (which I can upload later) will confirm, that the drone moved and gained speed without any commands from the controller and that there were no errors. All conditions for flying were good (No strong winds, clear sky, good GPS, stable compass and IMU readings).
I've lost a lot of confidence in the drone, that i had before and was amazed at the engineering work behind it.
Damages: mostly cosmetical, except as the battery fell out at the crash location, the battery clamp sockets on the drone side seem a bit bent and I'm afraid it will jepordize the battery staying secured in the future. Also will need to do further testing, but it seems to drift a bit more, and struggling to keep still/stable.
What's also strange is, that in my flight log, the drones initial facing direction seems opposite of what it actually was.
This is my little sad story.
EDIT:
I've been travelling and was unable to deal with all this earlier.
Uploaded the log available from the app to: http://www.phantomhelp.com/LogViewer/9TVU5N3F45PJ4CN6P2CY/
Unfortunately that log does not seem to display any information regarding the controller inputs, so for this scenario seems not too useful.
More information in the HealhyDrones log: http://healthydrones.com/main?share=wXcNNi but can't find control inputs on this one either..
I was unable to upload to a reader or read the flight logs (.BAK file) I got straight out of the drone with DJI Assistant via my computer, but I uploaded them to dropbox, and they can be downloaded here: https://www.dropbox.com/s/xpa2lm ... 1-03-05%5D.rar?dl=0 (hope it's the correct one )
Anyhow, on my own inspection it seems that without any Compass errors and the compass calibration screen giving no interference (all green) on the map (in the app) the drone's direction seems the opposite of what it was, and I figure the drone wanted to correct it's location because of wind movement and what not, trusting the compass, but correcting in the wrong direction, hence trying to correct even harder and gaining more speed in the wrong direction..
Here are some images of the drone after the accident. The pictures were taken right after getting home, I've managed to clean it a bit but not completely.
The nooks holding in the battery have gotten bent, theres a lot of scratches and dents, the colored scratches don't want to completely clear off (the one at the battery nook location is extremely weird).
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