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• Next, power on the transmitter, then the plug the battery pack into the battery lead of the 3-in-1 control unit.
Allow time for the 3-in-1 control unit to initialize properly. Also, be sure to allow the gyro to initialize properly,
as outlined in its manual. If you are using the G90 gyro, the blue status LED should illuminate solidly just before
the status LED of the 3-in-1 unit becomes solid green. This will indicate that the gyro and 3-in-1 control unit are
ready for the test.
• After securing the helicopter and ensuring that all objects are free and clear of the tail rotor blades, and also
reconfirming that the main motor power lead has been disconnected from the 3-in-1 control unit, advance the
throttle/collective stick on the transmitter to approximately 1/3–1/2 travel. Use caution, as the tail motor may
begin to spin the tail rotor blade.
• Now it is best to check that the tail motor/rotor is responding properly to transmitter inputs. When inputting
a slight amount of right rudder, the tail rotor rpms should increase (to push the nose of the helicopter to the
right). When inputting a slight amount of left rudder, the tail rotor rpms should decrease or stop entirely. If
the tail motor/rotor is not responding properly, use the Servo Reversing switch located on the front of the
transmitter to reverse the direction of response.
• Once confirming that the tail motor/rotor is responding properly to transmitter inputs, it will also be necessary
to confirm that it is responding properly to inputs from the gyro. After again securing the helicopter and
ensuring that all objects are free and clear from the tail motor, and that the throttle is set to approximately
1/3–1/2 power, quickly twist the nose of the helicopter to the left. If the tail motor/rotor is responding properly
to inputs from the gyro, the rpms will increase, to counteract the nose twisting to the left, in order to bring the
nose back to the right. When quickly twisting the nose of the helicopter to right, the rpms should decrease or
stop entirely. If the tail motor/rotor is not responding properly, use the Reverse switch located on the gyro to
reverse the direction of response.
• After confirming that the tail motor/rotor is responding properly to inputs from the gyro and transmitter,
disconnect the battery from the 3-in-1 control unit, power down the transmitter and re-install the main motor
power lead into the 3-in-1 noting proper polarity for correct operation.
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