Spirit System

Hi

Just at take off head speed the tail rotates quicly to the right in a full circle. The servo direction is OK and the blades move smoothly. Any ideas of what the problem is?

Could be in the config although moving the TX sticks commands the correct throw direction, the spirit may have this direction reversed somewhere in the settings?

It could be also wrong Mounting Position configuration.
Servo must compensate in the correct direction otherwise model will yaw everytime during lift off.
You can check it without main blades when you will set low RPM and carefully change position.
If it will not try to hold then General/Mounting position was set to incorrect one.
It is better to hold tail boom very firmly and carefully. Very low RPM are enough to check this.