Project Drunken Sparrow (link to thread)

[ianwood]

This applies to Vision and Vision+ owners too: viewtopic.php?f=19&t=16598

For those not familiar with the Compass Declination Defect

If you live in:

• Western US and Canada
• Northeastern US and Canada
• Eastern OZ and all of NZ
• Northeastern South America
• Southern Africa

This applies to you:

• Affects all P2x in areas of high magnetic declination (+/-8 or higher).
• Curved flight and hooking is worst when first flying. It improves during flight but may take several minutes.
• Once power is removed, the P2 forgets any adaptions it made during the previous flight.
• It appears to not affect the P1.
• Areas with very high declination will experience TBE during initial hover.
• Several people have returned their P2x thinking it was defective only to get a new one with the same problem.
• This is a firmware defect. Possibly a signing bug in the code.
• This defect is still present in versions 2.0 and 3.0 of the firmware.
• Measuring the angle between initial true heading and initial course lock heading will give you the real margin of error.
• Rotating the compass is not a recommended workaround.
• Using a very rough bottom up model, it is expected that at least 1 in 4 P2x users experience this problem.
• "Beta testers" have submitted data to DJI for analysis. We are waiting on DJI to provide us with an update.

See this post for more detail on the issue: viewtopic.php?f=19&t=10317

Follow the link at the beginning of the post for what we're trying to do about it.

 

[Don the builder]

I watched the video on the link and read a number of the comments, as I too am here in LA I have experienced this not every flight but from time to time it is very pronounced.