Actually, I see it almost every day. If a person takes off in a magnetic field that is interfering with the compass, almost every time within 1 foot off the ground, the magnetic interference goes away, and the error message goes away. It will allow you to spool the motors up every single time.
In all the flight logs I've reviewed with compass issues, which is many hundreds now, I've never seen that sequence of events, and it would be completely inconsistent with how the FC uses the compass and IMU. Taking off from a magnetically distorted location is an almost certain recipe for compass/yaw errors in flight, with all the accompanying uncontrolled flight problems that you have no doubt seen in dozens of flight log analysis of events here. If you have a DAT file showing that not happening then I'd certainly like to see it.
I have learned that the compass calibration message is most times a misnomer. Compass calibration is not necessary, but it is compass interference that actually the case. As you know, temporary compass interference and compass calibration are 2 different things. Interference requires just moving to a different spot, or get out of the spot with interference. That includes moving or climbing vertically or horizontally sometimes as little as 1 foot to escape the interference.
It can certainly be a misnomer, as has been explained many times here, but it depends on the model of Mavic. Compass interference (move or calibrate) messages on the ground arise from one of two reasons: either the magnetometers are reporting values that are outside the accepted range (could be external or internal magnetic fields) or, in the case of the
Mavic 2, the aircraft is requesting calibration based on time or distance, even though the magnetometers are probably measuring well within the expected range.
If it is a time/distance triggered M2 message then it should still fly just fine, but my M2 won't start motors until it is recalibrated in that situation.
If it is magnetic interference then moving the aircraft away from the source is all that's needed,
but the IMU has to be reinitialized otherwise compass errors will occur after takeoff. That will happen spontaneously given time, but it's safer just to restart the aircraft. Taking off is a terrible idea as the means of moving out of the interference, because the IMU yaw value will definitely be incorrect on takeoff, and IMU/compass disagreement will inevitably occur as soon as the aircraft climbs out of the distorted magnetic field.
So I'm not aware of any compass interference error on the ground that would allow you to takeoff, go away after takeoff, and not lead to serious IMU/compass disagreements afterwards.
This topic has been explained and discussed
ad nauseam by me,
@BudWalker,
@Meta4 and others, supported by numerous sets of data, so I'm very surprised to see you propose an explanation and strategy that is completely contradictory with what I would say is the established explanation.
) and it's been rather crazy at work lol... Anyhow, doing a second glance shows the damage wasn't much fortunately, looks like the "foot" just got more "bent" than cracked at the point where it screws to the folding arm, though I def need to do a more thorough check to make sure everything's kosher. I think the arm folded backwards when it hit the side of the house and that took most of the impact.
