Hubsan X4 DESIRE User manual

2.4GHZ RC SERIES 4 CHANNEL
®
THE HUBSAN X4
2.4GHZ RC SERIES 4 CHANNEL
THE HUBSAN X4

1 INTRODUCTION
Thank you for buying HUBSAN products. The X4 quadcopter is designed as an easy-to-use,
full-featured RC model capable of hovering, fast forward, and aerobatic ight maneuvers. Please read
the manual carefully and follow all instructions in it. Be sure to retain the manual for future reference,
routine maintenance, and tuning.
2.1 Important Notes
This RC quadcopter is not a
toy.
Any improper use of this product will result in serious injury. Be aware of your personal safety,
safety of others and your surrounding environment.
We recommend beginners learn to y with more experienced pilots playing nearby before
attempting to y the X4 for the rst time.
2.2 Caution
The X4 quadcopter has parts that move at high speed, which poses a certain degree of danger.
Choose a wide open space without obstacles. Do not operate the X4 near buildings, crowds of
people, high voltage cables, or trees to ensure the safety of yourself, others and your model.
Improper operation may cause damage to people and property.
2.3 LiPo Battery Safety Notes
The X4 is powered by a Lithium-Polymer (LiPo) battery.
To avoid risk of re or damage, never recharge your battery while it is inserted in the X4.
If you do not plan to y the X4 for a week or more, store the battery approximately 50% charged to
maintain battery performance and life.
2 SAFETY NOTES
H107 SPARE PART CHART
H107-A31 H107-A02
Propellers
H107-A03
MotorBody Shell
H107-A34
H107-A05
Battery
H107-A06
USB Charger
H107-A39
Rubber Feet
X4 RX
H107-A07
Screw Set
H107-16
Transmitter
H107-A13
T-Shirt
H107-A11
U Wrench
H107-A32
Blue LEDs
H107-A44
4*AAA Rechargeable
NI-MH battery（700mAh )
Red LEDs
H107C-A33
Value Pack
H107-A18
H107-12
Protection Cover

Charge and store LiPo batteries in a location where a battery re or explosion
(including smoke hazard) will not endanger life or property.
Keep LiPo batteries away from children and animals.
Never charge the LiPo battery that has ballooned or swelled .
Never charge the LiPo battery that has been punctured or damaged.
After a crash, inspect the battery pack for the sign of damage. Discard in
accordance with your country’s recycling laws.
Never charge the LiPo battery in a moving vehicle.
Never overcharge the LiPo battery.
Never leave the LiPo battery unattended during recharging.
Do not charge LiPo batteries near ammable materials or liquids.
Ensure that charging leads are connected correctly. Reverse polarity charging can
lead to battery damage or a re or explosion.
Have a suitable re extinguisher (electrical type) OR a large bucket of dry sand near
the charging area . Do not try to extinguish electrical (LiPo) battery res with water.
Reduce risks from re/explosion by storing and charging LiPo batteries inside a
suitable container.
Protect your LiPo battery from accidental damage during storage and
transportation. (Do not put battery packs in pockets or bags where they can short
circuit or can come into contact with sharp or metallic objects.).
If your LiPo battery is subjected to a shock (such as a crash), place it in a metal
container and observe for signs of swelling or heating for at least 30 minutes.
Do not attempt to disassemble or modify or repair the LiPo battery.
LiPo batteries are dierent from conventional batteries in that their chemical contents
are encased in a relatively lightweight foil packaging. This has the advantage of
signicantly reducing their weight, but does make them more susceptible to damage if
roughly or inappropriately handled. As with all batteries, there is a risk of re or
explosion if safety practices are ignored:
!
3) Hold the Throttle stick to the full down position and move the Rudder stick to the lower right
position. Quickly move the Aileron stick to the left and right repeatedly until the two headlights
blink, indicating successful calibration. This calibration will reduce excessive drifting when doing
level yaw turns.
4) If the X4 still drifts to one side, add a few sheets of paper (the number of sheets will vary
depending on the amount of drift) to the side of the X4 that drifts. The paper will help
counterbalance and create a level oset angle.

2.4 Prevent Moisture
The X4 contains many precision electrical components.
Store the battery and the X4 in a dry area at room temperature. Exposure to water or moisture may
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 inicting serious body injury or property damage.
Be careful to keep your body and loose clothing away from the blades. Never take your eyes o the
X4 or leave it unattended while it is turned on. Stop operating immediately if the X4 ies out of your
view. Once landed, immediately turn o the X4 and transmitter.
2.7 Avoid Flying Alone
Beginners should avoid ying alone when learning ight skills. We recommend ying with an
experienced pilot nearby in case you need help.
CAREFULLY INSPECT THE X4 BEFORE EVERY FLIGHT
• Before operation, check the batteries of the transmitter and X4 are charged for the ight.
• Before turning on the transmitter, check that the throttle stick is pulled completely backward
(down position).
• Carefully check rotor blades and rotor holders. Broken parts will pose risk of injury and hazard.
• Check the battery and power plug are securely fastened. Severe vibration during ight may
detach the plug and result in loss of control.
• When turning on the unit, always turn on the transmitter rst, and then turn on the X4. To power
o, always turn o the X4 rst and then the transmitter. Improper procedure may cause loss of
control of the quadcopter .
3 SAFETY CHECK BEFORE FLYING
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.
10. The arm of the X4 separates after a hard landing or crash.
This is specially designed to absorb impact from hard crashes.
Simply force the arms to snap back into the joint position as
shown.
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
battery compartment correctly (see the picture on P10 6.1.4 ). Pair the X4 and transmitter, then put
the X4 in Expert Mode (see P12, 7.2 ).
2) Set both the aileron and elevator trim to the middle so that the LCD displays 50.
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.

1.Transmitter and X4 do not pair.
Throttle stick needs to be in the full down position. Make sure you do not move the transmitter
sticks or trim during initial power-on.
2. Transmitter LED suddenly goes out.
Replace the AAA batteries in the transmitter.
3. Trasmitter display is not showing the setting interface after holding down the throttle for 2
seconds.
The throttle stick needs to be in the full down position.
4. Gyro is not working well.
(1) Battery voltage is too low.
(2) Pair the X4 with the transmitter again.
(3) Land the X4 with the throttle stick in the full down position for 3 seconds and then take o again.
5. X4 won't perform ips.
(1) Press the Elevator stick to enter into Expert Mode.
(2) In Expert Mode, the sensitivity on each channel should be above 90%. You can program the
sensitivity in the Setup Menu. See 7.3 on P13-14.
(3) Press the throttle stick to turn on ip function.
(4) LiPo power is too low. Recharge the X4.
6. Quadcopter is shaking and making noise.
Check that the motors, canopy, body and propellers are all properly positioned.
7. Switching between low and high rates on the transmitter is dicult.
Press the Elevator stick briey to switch between the Expert Mode (transmitter LED ashes red and
green) and Normal Mode (transmitter lights up green steadily). "Expert" will also appear at the
bottom center on the display.
8. Cannot take o.
(1) Make sure the propellers are installed correctly. The propellers are marked with "A" (clockwise)
and "B" (counterclockwise). Refer to the Top View picture below for the correct orientation.
(2) Make sure that each motor is installed correctly. There are two dierent motors with dierent
motor wire colors. Refer to the Bottom View picture below for the correct order.
B
B
B
B
A
A
A
A
White A
White B
Black A
Black B
B
B
BB
A
A
AA
White
White
Black
Black
Blue
Blue
Red
Red
Top View Bottom View
H107 TROUBLESHOOTING
4.2 Safety Advisory Notice
Always partially charge your LiPo battery before storage. LiPo batteries retain the power over a
reasonable period; It is not normally necessary to recharge stored LiPo batteries unless stored for
periods longer than 3-6 months.
If your LiPo battery has been over-discharged, it will not be possible to recharge it again.
4.1 3.7V 240mAh LiPo Battery
4.1.1 Take out the battery from the bottom of the X4.
3.7V 240mAh
4.1.2 Connect the battery with USB charger, then connect the USB charger to a computer or other
USB connector, such as a smartphone
charger. The LED lights up while charging
and turns o when charging is complete.
The voltage of the USB is +5±0.5V.
4 CHARGING THE LI-PO BATTERY
3.7V 240mAh
Recycling
Lithium-Polymer(LiPo) batteries must not be placed in with household trash. Please contact
your environmental or waste agency or the supplier of your model for local regulations and
the location of your nearest LiPo battery recycling center.

5.1 Identication and Functions of the Main Menu
TRANSMITTER
Main Menu
MODE 1 MODE 2
Battery voltage
display
Rudder trim
Elevator trim
Data display
Throttle trim
Aileron trim
Expert mode
T
X
M2
Expert
Battery voltage
display
Rudder trim
Elevator trim
Data display
Throttle trim
Aileron trim
Expert mode
T
X
M1
Expert
5 TRANSMITTER
MODE 1
MODE 2
T
X
R
X
M1 M2
Expert
4 Elevator Trim
1 Throttle/Rudder Stick
5 Rudder Trim
LCD
6 Throttle Trim
2 Elevator/Aileron Stick
7 Power Switch
3 Aileron Trim
T
X
R
X
M1 M2
Expert
4 Elevator Trim
(2) Elevator/Rudder Stick
5 Rudder Trim
LCD
6 Throttle Trim
(1) Throttle /Aileron Stick
7 Power Switch
3 Aileron Trim
9
12
5
6
7
8 8
8
10
11
1 2
11 3
10
4
15
15
13
14
13
14
15
15
1White blade B 9RX
10 720 motor (clockwise)
11 720 motor (counterclockwise)
12 Li-po battery
13 LED-2
14 LED-1
15 Rubber feet
2White blade A
3Black blade A
4Black blade B
5Upper shell
6Lower shell
7Screw
8Screw
No PART NAME QTY QTYNo PART NAME
1
1
1
1
1
1
2
3
1
2
2
1
2
2
4
Exploded View

MODE 2
Input Key Function
S/N Mode/ Control Function
MODE 1
(1)
Throttle /Aileron Stick
Move the stick forward or backward to increase or decrease speed . Move
the stick left or right to make the quadcopter roll left or right to initiate
a banked turn.
MODE 1
(2)
Elevator/Rudder Stick
Move the stick forward or backward to make the quadcopter nose point
up or down. Move the stick left or right to make the quadcopter
yaw left or right.
3 Aileron Trim
Aileron trim adjusts for left and right drift.
4 Elevator Trim
Elevator trim adjusts for forward and backward drift.
5 Rudder Trim
Rudder trim adjusts for drift of left and right rotation or yaw.
6 Throttle Trim
Throttle trim normally left at neutral. The lower trim turns LEDs on and o.
7 Power Switch
Push to ON to turn on the transmitter. Push to OFF to turn o.
MODE 2
2 Elevator/Aileron Stick
Move the stick forward or backward to make the quadcopter move
forward or backward. Move the stick left or right to make the
quadcopter drift sideways left or right.
1 Throttle/Rudder Stick
Move the stick forward or backward to make the quadcopter ascend or
descend. Move the stick left or right to rotate the quadcopter’s fuselage
left or right.
9. REMOVING AND INSTALLING LEDS
Attention：After a crash landing, the protection cover will loose and block the
propellers, check and press back the four cover holes before ying again.
>2mm
Removal: Unscrew and remove the lower shell and the rubber feet. Then desolder the red and
yellow wires.
Installation: Solder the red wire onto the anode/positive (+) lead of the LED, and the yellow onto
the cathode/negative (-) lead of the LED. Press the LED wires into the leg slots, then press the
motor wires into the leg slots. Install the lower shell, then the rubber feet. You can determine the
color of the LED lights by looking at the color of the LED wire insulation at the bottom of the LED
lens: red insulation is the red LED, blue insulation is the blue LED.
LED
LED
LED
LED Yellow
Red
1. First line up the wires with
the slots. The LED's black
insulated cathode(-) wire
must be outermost.
2. Line up the LED to the round
holder slot. Press the wires
carefully into the slot and secure
them neatly into the arm.
Installation is complete

5.2 Transmitter Stick Calibration
Mode 2: Push both sticks to the upper left position and hold, then power on the transmitter. Rotate
both sticks twice. Hold down any trim until the LED on the transmitter blinks red, indicating
successful calibration.
Mode 1: Push the left stick to the upper left position and right stick to the upper right position and
hold, then power on the transmitter. Rotate both sticks twice. Hold down any trim until the LED on
the transmitter blinks red, indicating successful calibration.
5.3 Transmitter Battery Installation
Notice: Do not mix old and new batteries.
Do not mix different types of batteries.
Do not charge non-rechargeable batteries.
Replace cover
Remove the cover Install 4 x AAA batteries
according to the correct polarities
PUSH PUSH
Install Propellers: Pinch the propeller hub,
align the hole to the motor shaft, and press
it straight down rmly but gently.
Remove Propellers: Hold the propeller, insert
the U wrench under the propeller, pull up
and the propeller will easily come o the
motor shaft.
The propellors are dangerous when the quadcopter is ying. To avoid injury or damage,
install the protection cover.
Note:
Remove the propellers. Position the cover’s four holes with the motors. Press each of them onto
the motors, then re-install the propellers in their correct positions on the X4 .
When removing the protection cover, remove the propellers rst as in the above steps, and
pinch the protection cover from each motor. After any crash landing, always check to make sure
the protection cover is still on tight, and that the body, motors and propellers are not damaged.

MODE 2 MODE 1
6.1 Power-On Safety Mode
Your X4's ight contoller is designed with a Power-On safety feature that ensures that the X4’s motor
will not start unless it detects a suitable control signal when the LiPo battery is connected.
6.1.1 Make sure the throttle stick is in the full down position.
6.1.2 Power on the transmitter and the red LED will
blink. Do not move any other stick or trim before the
transmitter and X4 nish pairing, or the X4 will drift.
The transmitter LED will turn green after pairing is
successfully completed.
6 FLY THE X4
T
X
M1 M2
6.1.3 Connect the battery plug with correct polarity.
3.7V 240mAh
7.4.4 Backward Flip
Push the Elevator stick forward and then quickly pull it backward. Release the stick to the center
after the ip.
MODE 2 MODE 1
Note: when the X4 battery is low, performing ip is not possible.
!
T
X
M1 M2
T
X
M1 M2
The X4’s propellers are not identical. Each propeller is labeled with an A or B. When installing
replacement propellers, be certain to install as shown below. The X4 will not y, and will ip and
crash if the propellers are not installed correctly.
A
A
B
B
FRONT
B
B
A
A
8 REPLACING PROPELLERS

6.1.4 Insert the battery into the bottom of your X4. Make sure the battery and wires are pushed
into the end of the battery compartment, so they will not negatively aect the center of gravity
and cause unstable ight. Twist the wires and squeeze them into the notched holder as
shown, to prevent shaking when ying.
6.1.5 LED Indications
After a “beep”, the red LED on the transmitter turns green, and the 6 lights on the X4 light
steadily, indicating successful pairing. Press the lower throttle trim for about 2 seconds to turn
the LEDs on or o. NOTE: The LEDs will automatically blink when the quadcopter battery
power is low or the pairing has failed.
3.7V 240mAh
3.7V 240mAh
T
X
M1 M2
T
X
M1 M2
Always disconnect the X4 battery plug after turning o the transmitter when you stop ying.
(MODE 2) (MODE 1)
Tip: You do not need to adjust the rudder trim
if the X4 keeps yawing left or right during
ight. The X4 will nd the rudder central point
automatically in 3 seconds after the
quadcopter lands on a level ground with
throttle full down. Landing on a level ground
MODE 2 MODE 1
7.4.1 Left Flip
Push the Aileron stick fully to the right and then quickly push it fully to the left. Release the stick to
the center position after the ip.
MODE 2 MODE 1
7.4.2 Right Flip
Push the Aileron stick fully to the left and then quickly push it fully to the right. Release the stick to
the center after the ip.
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
MODE 2 MODE 1
7.4.3 Forward Flip
Pull the Elevator stick backward and then quickly push it forward. Release the stick to the center
after the ip.
T
X
M1 M2
T
X
M1 M2

6.2 Transmitter Sticks And X4 Control Responses
CAUTION: To avoid loss of control, always move the transmitter sticks slowly. Be aware that
control inputs will reduce available lift. Be ready to use a little extra throttle to maintain height
during maneuvers.
Throttle increases/decreases the ying height of your quadcopter.
Rudder rotates your quadcopter’s fuselage left or right.
Elevator moves your quadcopter forward and backward.
MODE 2 MODE 1
MODE 2 MODE 1
MODE 2 MODE 1
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
T
X
M1 M2
Aileron moves your quadcopter left and right.
MODE 2 MODE 1
T
X
M1 M2
T
X
M1 M2
NOTE:
Expert
T
X
M1 M2
You can also adjust sensitivity in Expert Mode following the Normal Mode procedure controls.
3 dots displayed in Normal (Sensivity range 20-60%)
5 dots displayed in Expert (Sensivity range 60-100%)
Press the Elevator stick to switch between Normal Mode and Expert Mode at any time.
MODE 2 MODE 1
7.4 Aerial Flip Mode
Expert
T
X
M1 M2
The ip maneuver will only work in Expert Mode.
Use the Elevator stick to enter Expert mode.
Press the Throttle stick to enter Flip Mode, indicated by two "beeps".
Press the Throttle stick again to exit Flip Mode, indicated by one "beep".
For proper ip execution, make sure the X4 is close to level, within a 30°
angle with the ground, and add throttle to climb before you perform a ip.
!Left Right

7.1.2 Aileron and Rudder Reverse Setup
Press and hold the Elevator stick for 2 seconds to enter the setting menu. Press (a) Aileron Trim /(b)
Rudder Trim left or right to reverse the channel, and then press and hold the Elevator stick for 2
seconds to conrm and exit.
7.1 Reverse Setup
7.1.1 Elevator Reverse Setup
Press and hold the Elevator stick for 2 seconds to enter the settings menu. The LCD will display “SE”.
Press the Elevator Trim up or down to reverse the channel, and then press and hold the Elevator stick
for 2 seconds to conrm and exit.
T
X
M1 M2
(a)Aileron Trim
T
X
M1 M2
(b)Rudder Trim
7 ADVANCED PERFORMANCE SETUP
T
X
M1 M2
Elevator Trim
The X4 is factory set for Normal Mode ying, and it will always power up in Normal Mode. Though
fast and responsive in Normal Mode, the X4 has even greater performance capability when Expert
Mode is activated.
Press the Elevator stick to activate Expert Mode (the X4 and transmitter must both be on). Two beeps
indicate Expert Mode; one beep indicates Normal Mode.
7.2 Normal and Expert Flight Modes
T
X
M1 M2
T
X
M1 M2
Expert
Normal mode Expert mode
The LCD will display EXPERT and the green LED will blink red and green when in Expert Mode.
7.3 Sensitivity Setup
Hold down the Elevator stick for 2 seconds to
enter the setup (SE) menu. Press the base of the
throttle stick, the three-point dotted line starts
to ash (see picture (a) below). Press it again to
switch to dierent channels. Use the (a) Rudder
Trim, (b) Elevator Trim, or (c) Aileron Trim to
change the sensitivity values shown on the LCD
and then hold down the Elevator stick for 2
seconds to conrm or exit. The X4 control
sensitivity increases with higher value settings.
T
X
M1 M2
Flashing
(a) Rudder Sensivity Adjustment
T
X
M1 M2
Flashing
(b) Elevator Sensivity Adjustment
MODE 1
T
XR X
M1 M2
Expert
OFF
T
XR X
M1 M2
Expert
OFF
T
XR X
M1 M2
Expert
OFF
T
XR X
M1 M2
Expert
OFF
MODE 2
T
X
M1 M2
Flashing
(c) Aileron Sensivity Adjustment