Issues with the hexacopter on the Yaw axis

ArduCopter Copter 4.6
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1

I have a 9-inch hexacopter in a ‘Plus’ configuration, equipped with a Pixhawk 6C, Emax ESC BLHeli 50A, and SURPASS HOBBY Bat B3115 900 kV motors. The issue is that during flight, for some reason, there’s a problem with yaw: the copter turns left very well and without any noticeable issues, but when turning right, it either responds very weakly or doesn’t turn at all.

I’ve already checked the motor and propeller connections, and ArduCopter itself sends correct values to the motors when yawing in both directions (tested on the bench without propellers). I’ve also completely reconfigured the drone and checked the center of mass. What could be the problem?

2

Twisted motor mounts causing yaw imbalance. Search this forum for “twisted arms”, “twisted motors”, “yaw imbalance”