Hi guys, good day! While taking of the Tello drone,I noticed the rear right motor was spinning at a slower rate and I got a warning message telling that the there was a takeoff error. I am supposed to calibrate the Centre of Gravity. Will that resolve the issue of the motor rotating at a slower rate? @RYZE @DJI

Dear customer,
According to your description, it might be the problem of motor. In order to confirm for a further step, please contact us via support@ryzerobotics.com.
Hope my reply could help you.