Hi, Is there something that should be tuned/changes after upgrading as mentioned in subject ?
Especially during level flight, huge, rapid changes in RPM can be heard.
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yes, just found that in release notes. (actually were about to delete this post)
Thank you.
The major change is that between 2.8.1 (which I had flying very nicely) and 2.9.1 (which was initially all over the place for me) is the inertial measurements used on the Z axis. You need to make sure your not getting vibration into your board.
Check your Accel logs and see what levels they are showing, mine were varying by +/- 15 and the hex was all over the place.
I have now reduced it to +/- 1 and the hex is rock solid with the same settings.
You are going to need to do this check anyway with the upcoming 2.9.2 which will use inertial in the X/Y axis as well as Z.
And don't forget to reset your params to the defaults for 2.9, they are quite different from 2.8