Operating instructions

Mechanical fine-tuning:
- If the model drifts in one direction when hovering, either in the roll (left / right) or pitch (forward / back) axis, adjust the swashplate by
shortening / lengthening the pushrods until the drift ceases.
- If the helicopter swings to left or right around the vertical (yaw) axis, adjust the length of the tail rotor pushrod until the yawing ceases.
The travel of the tail rotor servo can be limited using the RUDD EXT pot. Ensure that the slider sleeve on the tail rotor shaft does not foul
the housing.
Electronic fine-tuning:
- If the model jitters around the roll or pitch axis when hovering, then the gain of the flybarless system is set too high. Turn the ELEV /
AILE G pot (for the pitch and roll axis) anti-clockwise in small increments until the jitter ceases. If the model responds lethargically to
the controls, turn this pot clockwise until the helicopter starts to jitter, then turn it anti-clockwise again until the jitter ceases.
- If you wish to increase agility around the roll and pitch axes, turn the ELEV / AILE EXT pot clockwise in small increments until the
preferred level of manoeuvrability is obtained. Turn the pot anti-clockwise if you wish to reduce the model's control response.
- If the model jitters around the roll or pitch axis when hovering, then the gain of the flybarless system is set too high. If the tail is not
stable, and swings in one direction when a sudden collective pitch command is given, then gyro gain is too low. If you need to adjust
tail gyro gain, please use the Gyro menu of your T8J transmitter (Instructions: 8.5 Gyro (gyro gain), page 44).
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Operating Instructions - BLUE ARROW CP120 S-FHSS RTB 2.4 GHz No. S2540