2.3 Prevent Moisture
R/C models are composed of many precision electrical components.
Store the battery and model in a dry area at room temperature. Exposure to water or
moisture may cause the model to malfunction resulting in loss of responsiveness, or a
crash.
2.4 Proper Operation
For safety please only use Hubsan’s spare parts for replacement.
2.5 Always Be Aware Of The Rotating Propellers
When in operation, the propellers will be spinning at high speed. The prop blades are
capable of inflicting serious body injury and damage to the property.
Be cautious of your actions and careful to keep your body and loose clothing away from
the blades. Never take your eyes off the model or leave it unattended while it is turned on.
Stop operation immediately if the model flies out of your view. Once landed, immediately
turn off the model and transmitter.
2.6 Avoid Flying Alone
Beginners and all First Pilot View(FPV) fliers should avoid flying alone when learning flight
skills. It is advised that an experienced pilot be in nearby guidance.
CAREFULLY INSPECT THE X4 BEFORE EVERY FLIGHT
• Before operation, please check the batteries of the transmitter and receiver are charged
enough for the flight.
• Before turning on the transmitter, please check that the throttle stick is in the full down
position.
• Carefully check rotor blades and rotor holders. Broken or premature failure of parts will
result in a dangerous situation.
• Check the battery and power plug are securely fastened. Vibration and violent flight
may lead the plug loosen and result in loss of control.
• When turning on the unit, please follow the power on/off procedure: for Power ON-
please turn on the transmitter first, and then turn on the receiver. For Power OFF- please
turn off the receiver first and then turn off the transmitter. Improper procedure may
cause loss of control of the quadcopter .
3 SAFETY CHECK BEFORE FLYING
13. One or more motors stop working
Answer: (1) Motor is damaged. Replace the motor.
(2) The motor connections(s) are disconnected. Resolder.
(3) An FET on the flight controller looks burned. Replace the flight controller.
14. The X4 is still drifting excessively when hovering even after a good accelerometer calibration.
Answer: Set it on a level surface and shim the side that it drifts to with a few sheets of paper (the
number of sheets will vary depending on the amount of drift), so it can calibrate the
accelerometers with a level offset angle.
THE HUBSAN X4
3
THE HUBSAN X4
22
15. The Camera can’t record
Answer: Press the button and the camera will start recording, when the recoding is finished
please press the button again to save it. If you don't want to save it please power off the TX.
Please check the battery in both TX and X4, when the battery is low, it can’t record.
SD
