Safety Check Before Flying - Hubsan X4 User Manual

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2.4 Prevent Moisture
The X4 contains many precision electrical components.
cause malfunction resulting in loss of responsiveness, or a crash.
2.5 Proper Operation
For safety only use the included HUBSAN spare parts for replacement.
2.6 Always Be Aware of the Rotating Blades
When in operation, the main and tail rotor blades will be spinning at high speed. The blades are
capable of inflicting serious body injury or property damage.
Be careful to keep your body and loose clothing away from the blades. Never take your eyes off the
X4 or leave it unattended while it is turned on. Stop operating immediately if the X4 flies out of your
view. Once landed, immediately turn off the X4 and transmitter.
2.7 Avoid Flying Alone
Beginners should avoid flying alone when learning flight skills. We recommend flying with an

3 SAFETY CHECK BEFORE FLYING

CAREFULLY INSPECT THE X4 BEFORE EVERY FLIGHT
(down position).
detach the plug and result in loss of control.
off, always turn off the X4 first and then the transmitter. Improper procedure may cause loss of
control of the quadcopter .
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9. The motors do not spin freely after a crash.
Press the shaft down from the top of the propeller and motor to remove any objects, or replace
the motor.
This is specially designed to absorb impact from hard crashes.
Simply force the arms to snap back into the joint position as
shown.
11. One or more motors stop working.
(1) Replace the motor.
(2) Resolder any broken motor connections.
(3) Spin the propellers to see if it jammed the motors, make sure the propellers can spin normally.
12. The X4 always drifts to one direction.
Calibrate the accelerometer as follows:
1) Before calibrating the accelerometer, make sure that the propellers, motors and body are in good
condition with the battery fully charged. Ensure that the battery and the cables are inserted into the
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