Dr Turbo one of the designers and Is DJI Propulsion man has stated the following
And he went on to say
I strongly suggest people take DR T advice as he is the man on this stuff but my personal opinion is this.
DR Turbo Stated that the IMU is calibrated at the factory in controlled conditions that ensure warm up times are kept to a minimum - this I would hazard a guess to be a temperature controlled environment. DJI's stance is you should only need to recalibrate If promoted to do so, this was also the case for the
P4 I believe as well.
However having learnt what I have from some of the best people on this forum I really believe it's a good idea to calibrate after doing any firmware updates, now if you just calibrate the IMU at room temp you will likely increase warmup times and it could take a few attempts to get a stable horizon based on passed experience so this is where the infamous cold IMU calibration comes in, you chill the craft a few degrees below your ambient and then calibrate thus showing the IMU the widest possible temp range thus keeping the warm up times down.
For me personally I will calibrate after every firmware update as I have done before, Whilst I'm not saying I don't trust DJI have calibrated correctly at the factory there are just too many variables at play for me to not do it, perhaps that's my OCD or I'm just a tool but my believe is to calibrate and be sure.
But I completely understand why Dr T stated it's not needed as tbh it should not be necessary in reality and having huge amount of new inexperienced users trying to calibrate the IMU with out following the correct process could causes large amounts of support issues in its self when it's not absolutely necessary let alone what else he stated.
I don't think this is correct. I think RTH does not depend on the mode the bird was set to. I think it should default to Smart RTH. Can someone confirm, specifically on the RTH comment. The comment about VPS being inactive in Sport mode is correct. I just don't think it applies to RTH.
At this moment it's not known that it does work when OE has been disabled like in Sport mode, this needs to be confirmed as the manual is not clear and no one has been able to confirm.
My belief is it should work but as it's not confirmed we have to assume otherwise.
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