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Crash, suspicious of battery

Discussion in 'Inspire 1 Discussion' started by Juan Crane, Dec 30, 2015.

  1. Juan Crane

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    So my inspire shut down in the air and fell from 60 meters, I had almost 100 successful flights, all my 5 batteries have almost 20 flights. I have cycled them as required by the app.
    I am very suspicious of a battery failure as the cause of this crash and I am wondering what their life expectancy is. I just purchased a new inspire 1 pro as a replacement while the other gets fixed but I am a little worried about using the "old" batteries. I have logged up to 200 flights on some of my other lipos!
     
  2. James Cole

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    Do you have the log file? we can tell you by that.
     
  3. Juan Crane

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    Yes I do, at the office though.
     
  4. James Cole

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    What firmware are you at?

    Did you take off with a full battery?

    What was the ambient temp?
     
  5. Juan Crane

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    Firmware was 1.4.0.10
    It was wam outside, definitely not cold.
    Took off on a full Battery charged about an hour before flight.
     
  6. Juan Crane

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    At 28 percent it just dropped from the sky
     
  7. James Cole

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    Strange...we need the logs Juan...
     
  8. Juan Crane

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    I'll send them to you tomorrow, where to?
     
  9. The Editor

    The Editor Moderator
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    Were you on a hard climb out at the time or flying aggressively?
     
  10. Juan Crane

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    I was doing a pull out shot, flying backwards fast while climbing slowly
     
  11. The Editor

    The Editor Moderator
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    At 28% left in the pack and performing a full stick maneuver you could run the risk of the pack voltage dropping to low voltage cut off.
    I would not be attempting fast/aggressive style flying at those depletion levels.
    What do you normally run your packs down to before you land?
     
    Predator, IrishSights and xahhax like this.
  12. James Cole

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    You can post them here via attachment so that we can tell you accurately what happened, If I miss something I am sure someone else wont.
     
  13. Juan Crane

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    I have my alarm set to 35 and normally land at 30, this time I got a little carried away.
     
  14. Juan Crane

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    Got it! Thanks
     
  15. lrwskyfilms

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    Sorry for your lost, as @The Editor said. I suppose the latest FW is help stop this happening. Hope you get it sorted.
     
  16. xahhax

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    Yeah pulling out too many amps on a 28% battery is not a good idea imho...
    If not cut off by the software, you could run a lipo fire and it is not necessarily better than the bird dropping from the sky.
     
  17. Juan Crane

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    Ok here is the download link for the log file.

    FLY352.DAT

    Let me know what you find!
     
  18. James Cole

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    Juan I am not so good at checking out a .Dat file...

    Can you get us the .txt file of the flight.... please check how to get it using IOS or Android, your file is actually inside the device you use for telemetry under "flight records"
     
  19. RotoRanger

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    Juan,
    I've attached a screen shot of the flight map along with a velocity and altitude plot. I was able to generate a .csv file which shows the actual data from the flight recorder but it is too large to upload. If you PM me with your email address, I can send it to you. This .csv file shows you the actual data from the flight recorder. From my reading, your recording appears to end abruptly at altitude indicating a total power loss of some kind. I don't know if the Inspire's battery depletion algorithms provide residual power to the recorder or not even when the ESCs and motors are shut down, but it appears as though power was suddenly interrupted to the entire aircraft power bus. I hope this helps.
     

    Attached Files:

  20. Ilian Iliev

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    Sorry. Roto Ranger

    Which column of the csv file shows the state of the battery