I recently purchased a used Phantom 3. I noticed an frequent chirp sound from one or two of the motors. I purchased 4 replacement motors and installed them and I still hear chirps.
Is this a common issue or should I investigate further? There doesn't seem to be any other flight issues with this...
As for the props spinning at different speeds at idle, I noticed that this happens if the drone is not on a level surface as if it were trying to correct it's pitch and yaw.
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