Mikrokopter Gutted… wkm low voltage crash

[plingboot]

Effing disaster last night.

Finally got single waypoint running and had my Y6 just sitting in the sky rock solid in gps mode shooting pics.

I was descending, when the low voltage alarm kicked in. Usually I have plenty of time to bring here down safely.

NOT this time.

Controls became completely unresponsive and she just shot down. The props were still under power, but nowhere near enought for a gentle landing.

'luckily' she landed flat on the skids, but the landing gear and the AV130 took the hit.

Damage.
Snapped one droidworx std landing gear plate
Massively bent and twisted AV130 roll cage, it's main toothed gear ring and camera plate
Broken AV130 tilt pot

Felt physically sick and totally gutted.

 

[DennyR]

The alternative is to get one of theseView attachment 5417 or disable the low battery cut-off on the ESC .You can then disable the battery monitor in the DJI and work with a telemetry signal to your Tx. If you loose the odd battery it is still a cheaper and safer option.http://www.youtube.com/watch?v=dLBNBEzvvUc&feature=player_embedded

Simply disabling the DJI will turn the shutdown over to the ESC which will still drop you out of the sky because they will give you some warning wobbles first and send you off usually in a bad sideways direction.

 

[plingboot]

Will have a look at that Denny.

As i say, i know how long i have on each pack and was flying her back down when this happened. I also have a balance lead screamer as a back-up alarm.

The strange thing was the complete, apparent, loss of any control from the radio…

Gallery of shame…

View attachment 5418View attachment 5419View attachment 5420

 

[DennyR]

Did you check the battery level after the crash. When I had a problem recently it was just after climbing to about 120 feet and then starting a slow descent two shut downs from almost the same place, but the props were still turning. I am convinced that it was firmware related.

If the assistant software is not stable then the upgrade could be getting corrupted.

 

[plingboot]

I'm sure this is firmware related.

It didn't just cut out and fall - it simply entered a very fast and level descent.

 

[ZAxis]

Having been in a very similar situation with our MK Y6 recently I can understand your frustration. In our case it was due to a bad battery cell. I hope my recent contribution to your 'repair fund' helps.

cheers
andy

 

[yeehaanow]

Switching into manual mode might've saved you. It's hard to react fast enough though. And if it is a battery problem and there's a danger of the esc's cutting off you could be in real trouble.

I had my Y-6 come down pretty fast once too with a low V protection. Most of the time it was a slow decent, but one time it REALLY wanted to be down.

 

[seattle_helo]

Sorry to hear about that, pling. No matter the cause it's always a terrible feeling to have something like that happen.

nick

 

[RotorTalk]

Sorry to hear that Pling I had a similar thing happen with my AD-8 a couple of weeks ago. Graupner telemetry (cell monitoring) does not work with their HoTT Electric Air module and gives a low reading for cell H1 by default. I flew not knowing that there was a problem with the battery and just like you she was hovering at about 3 m (I had just been up to 80m ;-) when she rolled forward briefly came back to level then rolled port and straight in... I wrote off an AV200, undercarriage gear rails. My mistake - I should have been more thorough with the battery commissioning. Since then I had a much worse prang which I'll write up separately.