UdiRC U42 User guide [ru]

Aerial Photography

U42

Notice:

1. Important Statement:

(1) This product is not a ordinary toy but a piece of complicated equipment which is
integrated with professional knowledge by mechanic, electronic, air mechanics,
high-frequency emission etc., so it should be installed and adjusted correctly to
avoid accidents. The user must always operate in a safe manner. We undertake no
liability for human injury or property damage caused by improper operation as we
could not control the procedure of installation, use and operation of this drone.

(2) This drone is suitable for experienced RC drone user aged 14 years or above.
(3) The flying field must be legally approved by your local government.
(4) We undertake no liability for those accidents caused by improper operation, use

and control of the drone after sale of the product.

(5) UDIRC has entrusted the distributor to provide technology support and after-sale
service. If you have any questions about use, operation, repair etc., please contact
your local distributor.

2. Safety Precautions:

Keep away from crowd when flying because a flying RC drone is very dangerous.
Improper assembly, broken main frame, defective electronic equipment or unskilled
operation all may cause unpredictable accidents such as drone damage or human injury.
Please pay special attention to safety operation and have good knowledge of accident
responsibility that the user may cause.

(1) Keep away from obstacles and crowd

The speed and status of a flying RC drone is uncertain and it may cause potential
danger. So the user must keep away from crowd, tall building, power lines etc.
when operating a flying RC drone. Do not fly a RC drone in rainy, storm, thunder and
lighting weather for the safety of user, around people and their property.

(2) Keep away from humid environment

The drone inside is consisted of precise electronic components. Humidity or water
vapor may damage electronic components and cause accident.

(3) Safe operation

Please operate the RC drone in accordance with your physical status and flying skill.
Fatigue, listlessness and improper operation may increase the rate of accident.

(4) Keep away from rotating parts

Rotating Parts can cause serious injury and damage. Keep face and body away from
rotating motors.

(5) Keep away from heat

The RC drone is made of metal, fiber, plastic, electronic components etc.
Keep away from heat and sunshine to avoid distortion and damage.

(6) Please do not touch the hot motor to avoid being burnt.

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3. Check List Before Flight

(1) Flying field must spacious enough and we suggest at least
8M (length)*8M (width)*5M (height).

(2) Make sure the drone battery and transmitter battery are fully charged.
(3) Make sure the Left Stick of the transmitter in the middle position.
(4) Please strictly obey the order of turn on and turn off before operation. Turn on the

transmitter power first and then turn on the drone power before flying; turn off the
drone power first and then turn off the transmitter power when finish flying. Improper
turn on and turn off order may cause the drone out of control and threaten people’s
safety. Please cultivate a correct habit of turn on and turn off.

(5) Make sure the connection is solid between battery and motor etc. The ongoing
vibration may cause bad connection of power terminal make the drone out of control.

(6) Improper operation may cause drone crash, which may arouse motor defective and
noise, and then effect the flying status or even stop flying. Please go to the local
distributor to buy new parts for replacement so that the drone will return to its best status.

(7) The drone should be controlled within max control distance. Do not fly the drone near
tall building, high voltage cable or other place with signal interference. Or may cause
signal interruption and the drone will out of control, which may result of accident.

Main Specification

Drone Size

Drone Weight

Propeller Diameter

Flying Time

361*355*107mm

120g

146mm

7~8mins

Name of Parts

1. Drone

Propeller Guard

A Propeller

B Propeller

Drone Battery

Charging Time for Drone Battery

Max Flying Distance/Radius 100m

Camera Resolution 1280x720P

Front

Left Right

Rear

3.7V 500mAh

About 70mins

3

B Propeller

Upper Cover

A Propeller

Camera

Front Lamp Cover

(Green)

Rear Lamp Cover

(Orange)

2. Transmitter

Power Indicator Light

Power Switch

Left Stick

(Throttle / Rudder)

Rotation Trimmer

Heading Hold Mode

High / Low Speed Mode

Lower Cover

Front Lamp Cover
(Green)

Landing Gear

Rear Lamp Cover
(Orange)

Rigiht Stick
(Forward / Backward /
Left / Right)

Forward / Backward
Trimmer

Left / Right Trimmer

Take Off / Landing /
Emergency Stop Button

Flip Mode

Heading Hold Icon

High / Low Speed Mode Icon

Video Recording Photo Taking

Take Off / Landing /
Emergency Stop Icon

Flip Mode Icon

Indication Direction
of Power Switch

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Transmitter Installation:

Battery installation: open the battery cover on the back side of the transmitter and put 4
alkaline batteries (not included) into the box in accordance with
electrode instructions.

Drive the screw according to the
arrow direction to loosen the
screw to open the battery cover.
Tighten the screw by driving it in

Battery Cover

opposite direction.

4X1.5V
Alkaline Batteries

Notice:

1. Make sure the electrodes are correct.

2. Do not mixed use new and old batteries.

3. Do not mixed use different kinds of batteries.

4. Do not charge the non rechargeable battery.

Charging Instruction

1. Connect the drone battery with USB plug first and then choose one of the method as
below picture to connect with USB plug. (prior to choose 2A, 5V charger)

2. The red USB indicator light keeps bright when charging.

3. The charging time is about 70 minutes. The light turns to green when fully charged.

4. Li-Po battery is included in spare parts and please pay attention on the safe notice.

* Do not put the battery on high temperature place, such as fire or heating device to
avoid damage or explode.

* Do not use the battery to crash or hit hard surface.
* Do not put the battery in water and keep it in dry place.
* Do not open the battery.
* Do not leave the battery without supervision when charging.
* Make sure that there is no short circuit of the power wire.
* Please use the recommended charger only.
* Check the charger’s wire, plug, surface regularly. Do not use broken charger.

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Drone Battery

Li-Po Battery Disposal & Recycling

Wasted Lithium-Polymer batteries must not be placed with household trash.

Please contact local environmental or waste agency or the supplier

of your model or your nearest LiPo battery recycling center.

Calibration Instruction

Please follow below steps to calibrate the drone if the drone becomes imbalance after
crashing during the flight, and can not be adjusted by trimmer button and cause difficult
operation.

1. Power off the drone, then turn off the transmitter switch.

2. Turn on the transmitter switch, push the Left Stick all the way down to the lowest
position (Picture 1) and then release. The Left Stick will back to the middle position
automatically (Picture 2). The transmitter enters frequency pairing mode.

3. Power on the drone and put it on a flat surface in a

Picture 1

Picture 2

horizontal position. The LED lights change from flash
to solid bright, which indicates successful frequency
pairing.

4. Do not move the Left Stick before successful calibration.
Push the Right Stick as shown in Picture 3 and then
release. The drone body lights flash, which indicates
that the drone is calibrating. When the drone body

Picture 3

lights remain solid, which indicates successful calibration.
Notice: Fail to calibrate may cause loss of drone function.

Pre-Flight Instruction:

1. The green LED lights are front and the orange LED lights are rear.

2. Power on the drone and check the direction of the rotating propellers. The left front
and right rear A propellers rotating clockwise while the right front and left rear B
propellers rotating counterclockwise.

3. Adjust relative transmitter Trimmer button to adjust the rudder if the drone tilts to one
side when flying.

A Propeller

Clockwise

B Propeller

Counterclockwise

Front

Left Right

Rear

6

B Propeller
Counterclockwise

A Propeller
Clockwise

Pre-Flight Operation:

1. Turn on the transmitter switch and the LED indicator begins to flash rapidly. Push the
Left Stick all the way down to the lowest position and then release. The LED indicator
starts flash slowly, which indicates the transmitter enters frequency pairing.

2. Install the battery to the mounted box and power on the drone.

3. Put the drone on the flat surface, the drone body lights turn from flashing to solid bright,
which indicates successful frequency pairing.

Important Notice: Please make sure the gyro of the receiving board is placed on the
horizontal position after powering on the drone, so that the drone can
work well.

Two Take Off Modes

1. Take off: Push the Left Stick and Right Stick as Picture 4 shown to start the motor and
then release. Then push up the Left Stick to fly up the drone to certain altitude and
then release the stick.

2. One button take off:
drone will fly up automatically and keep flying at an altitudel of 1.2 meters.

Press the Take Off / Landing / Emergency Stop button, the

Take Off / Landing /
Emergency Stop Button

Picture 4

Picture 5

Two Landing Modes

1. Landing:
motors stop and the drone lands on the ground.

2. One Button Landing:
shortly, and the drone will fly down slowly till land on the ground.

Tip: Do not use the emergency stop function unless come across emergency situation.
The drone will fall down suddenly after all motors stop.

Push the Left Stick all the way down to the lowest position and hold it till the

Press the Take Off / Landing / Emergency Stop button once

Emergency Stop: When the drone in emergency situation and going to hit the walking
people or obstacle etc., press the Take Off/Landing/Emergency Stop button
immediately and hold it for about 1s and then release. The motors will stop immediately.

Altitude Hold Mode

Altitude hold mode indicates that the drone maintains a
consistent altitude while allowing roll, pitch, and yaw to be
controlled normally. It makes it easier to control the drone for
beginner and more stable for aerial photography.

Push the Left Stick up (down) to fly the drone up (down) at
certian altitude and then release the stick and the stick will back
to the center position as the right picture shown. And the drone
will keep flying at current altitude. Repeat below steps if you
want to change the drone altitude.

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Altitude Hold Center

Flying Control

1. Move the Right Stick to the left to fly the drone
to the left, and move the Right Stick to the right
to fly the drone to ther right.

3. Move the Left Stick to the left to rotate the drone
to the left, and move the Left Stick to the right to
rotate the drone to the right.

2. Push the Left Stick up to fly the drone up, and
pull the Left Stick down to fly the drone down.

4. Push the Right Stick up to fly the drone forward,
and pull the Right Stick down to fly the drone
backward.

1. If the drone rotates to the left or right

Move the Rotation Trimer to the right
till balance if the drone rotates to the
left, and move the Rotation Trimer to
the left till balance if the the drone

Rotate left Rotate right

rotates to the right.

2. If the drone tilts forward or backward

Pull down the Forward / Backward
Trimmer till balance if the drone drifts
forward, and push up the Forward /
Backward Trimmer if the drone drifts

Tilt forward Tilt backward

backward.

Front Rear

3. If the drone tilts to the left or right

Drift left Drift right

Move the Left / Right Trimmer to the
right till balance if the drone drifts to
the left, and move the Left / Right
Trimmerto the left till balance if the
drone drifts to the right.

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High / Low Speed Mode

By default, the drone is in Low Speed Mode. Press the High /
Low Speed Mode button and the transmitter will beep and enter
High Speed Mode.

1. Low Speed Mode is suitable for beginner.

2. High Speed Mode is suitable for expert.

High / Low Speed Mode

Flip Mode

(Note: The flip function is unavailable when the the drone body lights
flash for low battery)

Press the flip mode button when the drone is flying, and you will
hear constantly beep, which indicates flip mode is ready. Push the
Right Stick to forward / backward / left / right to utmost and then
release the stick. The drone will do 360° flip in corresponding
direction. After that the drone will exit from flip mode automatically.

Notice: The flip function is also unavailable when the drone in
heading hold mode.

Warning: Flying field must spacious enough when doing a flip,
or danger may occur.

Flip Mode

Heading Hold Mode

* Drones generally have a front and rear indicated by LED lights or colored propellers.
By default, the users are required to tell the front and the rear of the drone when flying.
Under heading hold mode, the users can operate the drone without worrying about the
orientation (left is left and right is right all the time, regardless of where your drone is
pointing at).

Heading Hold Mode is designed for beginners and users who fly the drone in daylight or
at a far distance.
When the drone in heading hold mode, push the Right Stick to forward / backward / left /
right, and the drone will fly to forward / backward / left / right accordingly.

Prerequisite: Position the drone in such a way that its front is your front (see Picture 1).
Tip: Do not change the orientation of the transmitter (see Picture 2) after entering heading hold mode.

Front

(Green Light)

Front

(Green Light)

Left Right

Rear

Picture 1 Picture 2

Left Right

Rear

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To turn on heading hold mode, press Heading Hold Mode
button and the drone LED lights flash, which indicates the
drone enters heading hold mode.
To turn off heading hold mode, press Heading Hold Mode
button again and the drone LED lights turn solid, which
indicates the heading hold mode is off.

Heading Hold Mode Button

Low Battery Alarm

When the drone in low battery, the transmitter will beep constantly to remind the user to
land the drone as soon as possible. The flip function will turn off automatically when the
drone in low battery.

Video Recording and Photo Taking

Note: insert the TF Card to the slot before power on the drone.

1. Press TF card to insert to the slot in accordance with
below picture. Make sure the metal side of the card
must face up.

2. Press Photo Taking button and the red indicator light
of the camera flashes briefly, which indicates the drone
is taking photo. Press Video Recording button and the
red ndicator light keeps bright, which indicates the drone is recording video. Press the
Video Recording button again to stop video recording and the indicator light off, which
indicates finish recording. Press the TF card to take it out.

Notice: Press Video Recording button to save a video when finishing recording, or the
video cannot be saved.

3. Power off the drone first when finish aerial photography. Take out TF card and insert
the card to the attached card reader. Connect the card reader with computer USB port.
After a while, view the aerial photography data from “my computer” - ”mobile disk”.

Tip: Please play the video or photo after coping all aerial photography data to computer
and make sure the play software can support AVI format.

micro

TF Card

Installation of Propeller Guard

Install the propeller guard to the drone and lock the
propeller guard by attached screws.

Remove the screw from the propeller guard and pull out the
propeller guard with moderate force.

Note: Fly the drone without the propeller guard can improve
the power and flight time.

10

Landing Gear Installation Diagram

To install the Landing Gear, insert the Landing
Gear’s pillars into the drone body holes with
moderate force as the diagram shown. Then
lock the Landing Gear by attached screw.
To remove the Landing Gear, remove the
screw first and then pull out the Landing Gear
with moderate force

Note: Please ensure the Landing Gear can stand
firm on the ground. Or the flight stability
would be effected.

Instruction for Receiving Board

The drone works well only when the installation direction of the receiving board and the
connection position of the wires the same as below picture:

Front

Right-front light wire

Left-front light wire

Left-front motor wire

(red and blue wire)

Left Right

Left-rear motor wire

(black and white wire)

Left-rear light wire Right-rear light wire

Left-rear light wire

1

Blue wire

2

Red wire

White wire

3

Black wire

4 8

9

Switch Wire Barometer

Rear

Black wire

White wire

Red wire

Blue wire

5

Right-front motor wire

6

(black and white wire)

Right-rear motor wire

7

(red and blue wire)

Right-rear light wire

Spare Parts

For convenience, the spare parts are listed for you to choose, which can be purchased
from the local distributor. ( Please refer to the exploded view below to check the circled
icon)

1310 1

7

9

U42-01

Upper Cover

U42-05

Landing Gear

U42-02

Lower Cover

11 1412

U42-06

Main Casing

19

U42-03

Propeller

U42-07

Lamp Cover

11

U42-04

Propeller Guard

U42-08

Clockwise Motor Parts

(Red and Blue Wire)

2

4

4

8

18 21

U42-09

Counterclockwise Motor

Parts (Black and White Wire)

U42-13

USB Charger

U42-17

Transmitter

Exploded View

1

2

3

4

5

6

9

7

8

3

4

5

6

10

11

12

13

14

15

16

14

U42-10

LED

U42-14

Camera Box

U42-11

Receiving Board

15 16

U42-15

Card Reader

U42-12

Drone Battery

U42-16

TF Card

9

9

7

3

8

4

5

6

17

18

19

20

21

1

3

2

4

5

6

9

12

12

No.

1

A Propeller (Clockwise)

Clockwise Motor

2

(Red and blue wire)

3 Drive Shaft

4 Motor Gear

5 Motor Holder

6 Speed Gear

B Propeller

7

(Counterclockwise)

Problem Problem Cause SolutionNo.

The
transmitter

1

indicator
light is off

Fail to
pair the

2

drone with
transmitter

The drone
is under­powered

3

or can not
fly.

The drone
can not

4

hover and
tilts to one
side

The drone
indicator

5

light is off

Name

No. Name

Counterclockwise Motor

8

(Black and white wire)

9 Propeller Guard

10 Upper Cover

11 Landing Gear

Rear Lamp Cover

12

(Orange)

13 Lower Cover

Front Lamp Cover

14

(Green)

No. Name

15 Camera

16 TF Card

17 Battery Cover

18 Receiving Board

19 Main Casing

20 Switch Board

21 Battery

Troubleshooting Guide

1. The transmitter battery is too low. 1. Replace battery.

2. The battery positive pole and negative
pole are in reverse order.

3. Poor Contact.

1. Indicator light is off. 1. The same as above 1.2.3.

2. There is interfering signal nearby.

3. Misoperation.

4. The electronic component is damaged
for frequent crash.

1. The blade deformed seriously. 1. Replace blade.

2. The drone battery is too low. 2. Recharge the drone battery.

3. Incorrect installation of blade.

1. The blade deformed seriously. 1. Replace blade.

2. The motor holder deformed and out of
verticality.

4. The motor is damaged. 4. Replace motor.

1. The drone battery is too low. 1. Recharge the drone battery.

2. The battery is expired or overdischarge
protection.

3. Poor contact.

2. Install the battery in accordance with the
user manual.

3. Clean the dirt between the battery and the
battery alice.

2. Restart the drone and power on the
transmitter.

3. Operate the drone step by step in
accordance with the user manual.

4. To buy spare parts from local seller and
replace damaged parts.

3. Install the blade in accordance with the
user manual instruction.

2. Replace the motor holder.

2. Buy a new battery from local seller to
replace or recharge the battery.

3. Disconnect the battery and then connect
it with the plug again.

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FCC Information

This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rul es.These limits are designed to provide
residential protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not Installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception. which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:

● Reorient or relocate the receiving antenna.

● Increase the separation between the equipment and receiver.

● Connect the equipment into an outlet on the circuit different from that to which the

receiver is connected.

● Consult the dealer or an experienced radio/TV technician for help.

FCC WARNING:
The equipment may generate or use radio frequency energy. Changes or modifications to
this equipment may cause harmful interference unless the modifications are expressly
approved in the instruction manual. Modifications not authorized by the manufacturer
may void user’s authority to operate this device.

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