1. How to measure the center of gravity of the helicopter?？

Remove the main rotor, tie a long line with heavy hammer to the tail pipe, raise the helicopter's tail, and then let the helicopter and the line fall naturally. And the intersection point of the line and the helicopter is the C.G. of helicopter.

2. Do we need to connect a battery to the RX?

No, RX’s power is supplied by the Adapter. No other battery is needed.

3. Shall I use a 7.4V battery to supply the power to control system and the servos which is connected to control system with a regulator?

No. The control system and the servos must be supplied by different batteries placed in different places for avoiding the mutual interferences by the current change to enhance reliability.

4. Where can we connect the battery to the servos?

Connect to the BATT socket of “servo out” on the adapter.

5. What is the channel AUX used for?？

It is used for the 4-servo swash plate helicopter. Or it can be used for gimbal control.

6. Can GPS & Compass be connected to any of the four EXT. sockets on the adapter?

No, it should only be connected to No 1 EXT. sockets on the adapter.

7. How to reverse the direction of the swash plate in Swash Mix of XP configure when adjusting the software on PC?

Change the rear percentage into negative value.

8. Why is there no response or does it need some time to respond when I push the stick to the top as instructed in the software when calibrating the PITCH channel?

If users use an electric helicopter, the throttle curve might be stretched level. Since the throttle and the pitch are controlled by the same stick, when users calibrate pitch channel, they at the same time calibrate the throttle channel. In the case when the throttle curve is level, the software could not read the changing value of the throttle, and thus the calibration is not complete. When a user calibrates the pitch channel, he/she should set the last point of throttle curve to 100% position, and set the throttle curve to its usual configuration after finishing the calibration as instructed.

9. Do I need to calibrate the channel every time I reset the curve of the channel?

If you change the setting of the channel's curve, you need to recalibrate the channel; if you change the curve's end point or its travel adjustment, you must also recalibrate the channel. Re-calibration will not be needed for trimming.

10. During compass calibration, should the white LED be constantly on without any exception at every circle?

Ideally, the white LED would be constantly on if the helicopter is rotated in a near-perfect horizontal position, within the ±3◦ error band.

In the case of accidental flashes, there will be no need to re-enter the calibration mode since data saving is not affected. Usually, the white LED being off means that the helicopter is deviated too far from the horizontal angel. Rotate the helicopter 3-4 circles, and make sure the white LED is not repeatedly off on one or more particular points (e.g. If you rotate the helicopter three circles. In the first circle, the white LED is off on point A, and it is still off on point A during the second and third circle).

The above instructions also apply for vertical axis calibration.

After calibration, in order to check if the calibration is successful, rotate the helicopter clockwise, stop every 90◦ and last for at least 5 seconds, observe the white LED before you rotate again. Repeat this for ten circles, if in eight out of these ten times, the white LED did not flash at all, then the calibration is successful; if not, you need to re-calibrate the helicopter again.

11. Do I need to restart the control system every time when I change the tuning parameters?

No. But we suggest customers to restart the system after GPS calibration.