Video of Naza-m v2 dropping rev and sinking in lake

[swede_sailor]

Anyone got an idea about what happened here?

When starting to ascend the motors cut out totaly and the hexa dropped into the water.
It was a DJI F550. You can hear the engines start to rev up again just before hitting the surface

Could be pilot-error (throttle) but since it cut out when I started a planned 50+ meter ascend I dont think that was it. Anyone had sudden drops/cut outs?

 

[Bugilt]

With the information provided anything is pretty much a guess. What TX/RX are you using?

 

[PeteDee]

Battery, settings, pilot error, LVC all possibilities without any other info being offered.

Pete

 

[swede_sailor]

Latest Firmware on everything, fully charged 4S5000Mah, about 15 sec into flight, 7+ GPS-satellite connection, GPS-mode, DX8 with AR8000.

Here is a film of the whole flight:

 

[vispaaja]

Wow that sucks..

It comes to mind that if there were a glitch with the radio and failsafe throttle was set to zero, then this could possibly happen. U channel should be set to `failsafe`and throttle to around 30%. Have you had problems with the DX8 before? Is the receiver located near ESC's?

 

[stitch1615]

Anyone got an idea about what happened here?

When starting to ascend the motors cut out totaly and the hexa dropped into the water.
It was a DJI F550. You can hear the engines start to rev up again just before hitting the surface

Could be pilot-error (throttle) but since it cut out when I started a planned 50+ meter ascend I dont think that was it. Anyone had sudden drops/cut outs?

Given their propensity for failure, I believe it's pretty bold flying any Naza over water.
I'm sorry for your loss.

 

[photobobga]

If you were using a GoPro with the wireless option turned on (blue light flashing) and did not have your Fail Safe configured correctly this could be your problem.
http://www.multirotorforums.com/showthread.php?14528-GoPro-wireless-option-linked-to-NAZA-flyaways

-Bob

 

[OneStopRC]

Could have been a battery failure! could have been a number of things as mentioned.... my guess is either the battery was not charged or it just failed. It can happen, would love for someone to tell me different.

 

[tom3holer]

Well to look at the bright side at least it was fresh water.

How did it do after the recovery?

Tom

Cape Cod

 

[stitch1615]

Could have been a battery failure! could have been a number of things as mentioned.... my guess is either the battery was not charged or it just failed. It can happen, would love for someone to tell me different.

I had a perfect flying Reptile 500 (Discovery clone) and it had perhaps 50-60 flawless flights on it.
I took it up in a slow climb to about 150' and it just dropped out of the sky.
No explanation at all. Battery had 10.9 volts, telemetry voltage never wavered, etc, etc, etc.
I connected it to the assistant and not a hint of an issue.
Broken arms and props but everything is in a new PVC scratch-built and performing flawlessly,,,,, until the next time.
I suspected an esc but they all check out perfectly. I came to the conclusion that sometimes it just happens.