Phantom drop in altitude.

[tbird68]

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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[pwiggy]

Did you calibrate compass prior to flight?


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[Liamus27]

Did you calibrate compass prior to flight?


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I don't think the compass would affect altitude

 

[r62ewa]

Are you using a gimbal guard?

 

[tbird68]

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


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[N017RW]

Did you calibrate compass prior to flight?


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More internet lore.
Compass determines heading referenced to the Earths' magnetic field.

There is no elevation component to it.

 

[pwiggy]

Could be vps problem.


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[Thomas.]

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.


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[tbird68]

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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[paulgp4]

Download

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.




Sent from my iPhone using PhantomPilots mobile app

assistant2 and do a manual calibration on sensors that worked for me

 

[Thomas.]

Did it help?


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[tbird68]

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


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