My Air Crashed Twice Today

Discussion in 'Mavic Air' started by heo3480, Feb 13, 2018.

  1. heo3480

    heo3480 Well-Known Member

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    I have been pretty happy with my Mavic Air until now and it has not failed me until today.

    I all started with me accidentally dropping it on the tile floor yesterday from a 1,5m height. It seemed fine to me when inspected with no marks. I decided to fly it today to make sure nothing was broken. Everything was fine from the DJI Go 4 App to I decided to take off with 14 satellites.

    After take off it drifted hard left and ended up crashing into a bench, where the front arm took most of the impact by folding back. I decided to give it one more try on a more soft surface, and again it was completely out of control by I managed to semi land it.

    I took it indoor and calibrated IMU and Compass and that seemed to have resolved the problem. Seems crazy the sensors can be that much off from an impact, or could this be caused by something else.

    NB! it was dark outside when I tested, so could downward sensor system have been confused?
     
  2. Mossiback

    Mossiback Well-Known Member

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    Anti-collision and positioning sensors need adequate light to function. With GPS only it may drift a little but not as much as your description.
     
  3. philh24

    philh24 Well-Known Member

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    Sorry to hear you had a problem but at least you no what caused the problem. It was most definitely was from the impact I’m sure.
    The sensors don’t work correctly at night or in dark conditions.
     
    #3 philh24, Feb 13, 2018
    Last edited: Feb 13, 2018
  4. Thunderdrones

    Thunderdrones Well-Known Member
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    OP, spin all your motors around and see if you are getting any more resistance in one of them than the rest of them. One motor out of sync could cause it to do that. I dont think that your sensors are the problem.
     
    Skymax likes this.
  5. R1Mavic

    R1Mavic Well-Known Member

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    Sorry to hear this. I'm lucky my crash had no adverse effects.
     
  6. heo3480

    heo3480 Well-Known Member

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    I'll fly it tomorrow and see how it goes
     
  7. thongbong

    thongbong Well-Known Member

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    dont want to be the bearer of bad news but if an IMU calibration won't fix it, sounds like you might have knocked something loose on the board, maybe the IMU.
     
  8. heo3480

    heo3480 Well-Known Member

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    That's what I fear as well
     
  9. heo3480

    heo3480 Well-Known Member

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    It flies again after the IMU calibration
     
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  10. Skymax

    Skymax Well-Known Member

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    Also Bent or damaged Props can give you Sensor fail warnings.
     
  11. OldBlueHeron

    OldBlueHeron Well-Known Member

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    This is my most sensitive dji drone. I’ve calibrated it more then all my others combined. Once calibrated it flies as expected.
     
    heo3480 likes this.
  12. Talley

    Talley Well-Known Member

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    Mines a tough one.

    Anyone wanna sell me props :)
     
  13. Squamer

    Squamer Well-Known Member

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    Spark props till dji releases spair Air props
     
  14. Homie_555

    Homie_555 New Member

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    Hi guys - first post here.

    So brand new Mavic Air. I was flying the spark before so and upgraded to the Air. Flew it once and all was perfect; second time I attached the prop guards at night and it did a very acward steep back twice; first it crashed into a tree and got some scratches. It baffled me so I tried once more and did the same thing!! Crashed twice. Nothing - not even the props - looks damaged except for the scratches... sad that I got some scars but It was super strange. Im blaming the night and the prop guards, hoping that it doesnt happen again Im going to try it with some daylight...
     
  15. swooshdave

    swooshdave Well-Known Member

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    The sensors can certainly be affected by hard impacts.

    For more information than you need: iPhone 4 Gyroscope Teardown

    [​IMG]

    [​IMG]

    Note the sizes. The human hair is roughly 75 microns in width. So given the size of a typical gyroscope or compass or the like it doesn't take much to affect one. It more surprising they are as robust as they for as small as they are.
     
    joejaxvic123 likes this.
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