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  1. tbird68

    Joined:
    Mar 19, 2016
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    Hello I wonder if someone could give me some advice.
    Took off as normal. Ascended to approx 40mtrs. Just hovering and panning around when P4 fell approx 20mtrs. I managed to regain control and land.

    When I play the flight back I notice that the altitude is all good but when it dropped the altitude then showed -20mtrs when it was still in the air?

    Signal was good, no break in video 17 sats. Is this down to IMU or something?

    I look forward to any advice or comments.




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  2. pwiggy

    Joined:
    May 23, 2016
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    Did you calibrate compass prior to flight?


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  3. Liamus27

    Joined:
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    Location:
    Cornwall
    I don't think the compass would affect altitude
     
  4. r62ewa

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    Are you using a gimbal guard?
     
  5. tbird68

    Joined:
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    No gimbal guard. And yes compass cal before I flew. Just a bit worried for my next flight!


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  6. N017RW

    Joined:
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    Location:
    Palm Beach Co.- FL
    More internet lore.
    Compass determines heading referenced to the Earths' magnetic field.

    There is no elevation component to it.
     
  7. pwiggy

    Joined:
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    Could be vps problem.


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  8. Thomas.

    Joined:
    May 31, 2016
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    Location:
    Close to Bonn & Cologne, Germany
    I have a similar problem. But mine does not drop that much. Service told me to send it in because we agreed that it's most probably a problem of the barometer.


    Sent from my iPad using PhantomPilots mobile app (living near Cologne, Germany)
     
  9. tbird68

    Joined:
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    I just flown again. 2 flights ok. 3rd flight moving along slowly at at approx 3-4mtrs. (Following old railway line) then altitude shows dropping drone physically did not. But by end of flight showing altitude at landing of -8.5 mtrs? I called IMU before take off and did compass cal prior to flight.


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  10. paulgp4

    Joined:
    Jun 16, 2016
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    Download
    assistant2 and do a manual calibration on sensors that worked for me
     
  11. Thomas.

    Joined:
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    Location:
    Close to Bonn & Cologne, Germany
    Did it help?


    Sent from my iPad using PhantomPilots mobile app (living near Cologne, Germany)
     
  12. tbird68

    Joined:
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    I have not had chance to fly again since calibrating. Will update as soon as I get chance to test.


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