FORCE LANDING ?!

msinger · Nov 6, 2016

4wd said:
What does healthy drones say about the battery cells?

There is no battery data in the Mavic flight logs. I'm hoping DJI fixes that issue soon.

msinger · Nov 6, 2016

Ed209, can you upload your TXT flight log here and post a link back here? It'll allow us to see more data than shown by Healthy Drones.

m0j0 · Nov 6, 2016

Forced landing really leads me to believe bad cell on the battery. I don't think it was a disconnect.. logs don't show that. I would be really curious to see what the battery showed for voltage across the cells. If one cell was low it may have forced the landing. Especially, watching the video. The operator was zipping around pretty good which could have strained the battery.. all theories I guess without a reading from the battery.

Ed209 · Nov 6, 2016

Steve said:
Off topic a little, but is there a fan in the controller or something? Sounds like something spun up at 6:57.. I wonder if there might be a problem with the controllers..

Yeah seems that the R/C has a fan that spins up from time to time.

Ed209 · Nov 6, 2016

msinger said:
There is no battery data in the Mavic flight logs. I'm hoping DJI fixes that issue soon.

Yeah I noticed that too and reported in the HD forum. I thought at first it just wasn't tracking serial numbers but on closer look it seems it's missing most of the data.

msinger said:
Ed209, can you upload your TXT flight log here and post a link back here? It'll allow us to see more data than shown by Healthy Drones.

Working on that log right now. Will post it ASAP.

msinger · Nov 6, 2016

Ed209 said:
Yeah I noticed that too and reported in the HD forum. I thought at first it just wasn't tracking serial numbers but on closer look it seems it's missing most of the data.

Unfortunately, they won't be able to do anything about it. The data is not being saved to the flight logs.

Ed209 · Nov 6, 2016

m0j0 said:
Forced landing really leads me to believe bad cell on the battery. I don't think it was a disconnect.. logs don't show that. I would be really curious to see what the battery showed for voltage across the cells. If one cell was low it may have forced the landing. Especially, watching the video. The operator was zipping around pretty good which could have strained the battery.. all theories I guess without a reading from the battery.

Yeah I was zipping around pretty good earlier but at the end of the flight I was taking it easy because I was walking off the pier to shoreline since some people walked onto the pier after I lifted off. Usually when you get some voltage sag, it recovers after you ease up. I've studied that closely when pushing distance flights with my P3 to 0%. Even so, DJI Go should report some critical voltage or battery failure.

m0j0 · Nov 6, 2016

The absence of battery data is troubling that is a critical element to monitor. Hmmm why would they leave that out.

msinger · Nov 6, 2016

It's most likely a bug.

jimbug · Nov 6, 2016

I'm very interested in the results of this inquiry. My Mavic is weeks away, but my plans involved much flying over water to film fishing, paddle boarding, and kayaking.

I'm so glad there are so many DJI drone experts here to guide us newbies. Thank you guys for your experience.

Sent from my iPhone using MavicPilots

J3ffrey · Nov 6, 2016

Why is your video not level... ?

Ed209 · Nov 6, 2016

J3ffrey said:
Why is your video not level... ?

Plagued with gimbal horizon issue. I have tried to calibrate and it seems to go wonky often. With the P3 you could calibrate while flying and that worked for me. But you can't calibrate the Mavic's.

Ed209 · Nov 6, 2016

msinger said:
Ed209, can you upload your TXT flight log here and post a link back here? It'll allow us to see more data than shown by Healthy Drones.

Are you able to read DAT files from DJI Assistant 2? I exported them but seems that Datcon isn't able to read them.

msinger · Nov 6, 2016

No. My log viewer can only read TXT flight logs.

Ed209 · Nov 6, 2016

msinger said:
No. My log viewer can only read TXT flight logs.

Ahhh Ok I was getting ahead of myself. TXT file is here: Phantom Log Viewer - PhantomHelp.com

AnzacJack · Nov 6, 2016

wondering about any surface radar interference from those boats?

quesoburgesa · Nov 6, 2016

djholt said:
Technically, DJI Care does not cover anything that results from water damage--even if water damage were to occur following the original problem. Even still, I purchased the protection. For your reference, here is a list of the exclusions:

If the theoretical water 'landing' resulted from a defect with the mavic, then it doesn't even seem like dji care is applicable. Dji care isn't a substitute for the warranty that accompanies the mavic, but is an add-on to cover damage caused by misadventure or bad luck.

Sent from my HTC_0PJA10 using MavicPilots mobile app

Ed209 · Nov 6, 2016

anzacjack said:
wondering about any surface radar interference from those boats?

That would be a first been flying around here for over a year.

Mavic_Man504 · Nov 6, 2016

couldn't you use a battery/cell tester to see what percentages you're getting per cell?

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Steve · Nov 6, 2016

Mavic_Man504 said:
couldn't you use a battery/cell tester to see what percentages you're getting per cell?

Sent from my SM-G935V using MavicPilots mobile app

I thought that through the DJI Go app you can actually see each individual cells values??