GDU Byrd Standard User manual

User Manual
GDU Byrd
User Manual V1.1

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Table of Contents
Product features......................................................................................................................... 4
Portable design........................................................................................................................4
Long endurance time...............................................................................................................4
Multi-adaptive aircraft platform............................................................................................. 4
HD video downlink system.....................................................................................................4
Anti-shooting propellers......................................................................................................... 4
Dual remote controller............................................................................................................ 4
Stowage dropping................................................................................................................... 5
User Instructions.........................................................................................................................5
Warning...................................................................................................................................5
Tutorial video..........................................................................................................................6
App download.........................................................................................................................6
Register................................................................................................................................... 6
Safety Overview.......................................................................................................................... 6
Aircraft........................................................................................................................................ 8
Flight mode............................................................................................................................. 9
RTH mode...............................................................................................................................9
Aircraft status indicator........................................................................................................ 11
Vision positioning system.....................................................................................................12
Stowage dropping................................................................................................................. 13
Remote controller..................................................................................................................... 15
Dual remote controller.......................................................................................................... 16
HD video downlink system...................................................................................................16
Gimbal control...................................................................................................................... 16
Control of aircraft................................................................................................................. 17
Link.......................................................................................................................................18
Gimbal camera..........................................................................................................................20
Byrd-001 gimbal................................................................................................................... 20

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Byrd-002 gimbal................................................................................................................... 21
Byrd-003 gimbal................................................................................................................... 22
Byrd-004 gimbal................................................................................................................... 22
GDU Pro App............................................................................................................................. 24
FCS Firmware Upgrade............................................................................................................. 32
Product assembly......................................................................................................................34
Aircraft preparation...............................................................................................................34
Remote controller preparation.............................................................................................. 39
Flight......................................................................................................................................... 42
Pre-check.............................................................................................................................. 42
Accelerator calibration..........................................................................................................42
Compass calibration..............................................................................................................42
Takeoff..................................................................................................................................44
Landing................................................................................................................................. 45
FAQ............................................................................................................................................46
Technical parameters............................................................................................................... 50
GDU Byrd Standard..............................................................................................................50
GDU Byrd Premium............................................................................................................. 55
Authentication information......................................................................................................58
FCC Compliance...................................................................................................................58
FCC Warning Message.........................................................................................................58
FCC Radiation Exposure Statement:.................................................................................... 58

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Product features
Portable design
While ensuring structural strength and comfortable
experience, the arms, landing gears and blades are
designed to be foldable and portable.
Long endurance time
Equipped with a large-capacity battery. This allows
the GDU Byrd to achieve 29 minutes flight time.
Multi-adaptive aircraft platform
Brand-new attitude integration control algorithm
together with three-axis high-precision image
stabilization design will bring you best photographing
effect and experience. Multi-adaptive aircraft platform
can carry 1080P, 4K high-definition sports camera
and infrared camera. Quick release design makes the
replacement easier.
HD video downlink system
GDU Byrd is equipped with HD video downlink
system, which supports real-time HD videos and
pictures transmitting. The transmission distance of
Advance2.0 and Premium2.0 can reach 2,000 meters.
Its USB interfaces allow Internet surfing during flight
time!
Anti-shooting propellers
The propellers offer dual safety protection, The
propeller cap is a self-locking device which can
prevent the blade from disconnecting.Even if the cap
falls off, the propellers will stay in place.
Dual remote controller
Joy of flight comes from participation,
communication and interaction.Dual remote controller
are designed particularly for sharing, the master unit
has higher priority than slave unit, offering safety
during training and allowing the operator to share the
flight experience.

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CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED
BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING
TO THE INSTRUCTIONS
Stowage dropping
The strong dynamic system could release more load
task. You could choose objects for long distance
ejection according to your needs.
User Instructions
Warning
Thank you for purchasing the GDU Byrd. This product has the ability to cause serious bodily
harm and even death as well as property damage if operated improperly. The GDU Byrd is a
highly sensitive, highly tuned RC aircraft and should not be operated by persons under the age of
18. The operator is responsible for knowing the local laws and abiding by them. GDU is NOT
responsible for improper/illegal use of this product.
To ensure the quality of your experience and your personal security, please carefully read the
following sections before operating the aircraft;
1. Disclaimer
2. Battery safety guidelines
3. Routine Maintenance Manual
4. Item List
5. User Manual
6. After-sales Service Manual
7. First Flight Guide and Fast Flight Guide

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Tutorial video
In addition to above written instructions, GDU also provides tutorial videos for you.
You can go to www.gdu-tech.com or scan the following QR code to watch and download the
tutorial video to better learn how to use the aircraft.
App download
To ensure the best experience, please go to www.gdu-tech.com or scan the QR code below to
download and install GDU Pro App.
Register
To enjoy perfect after-sale services, please register your aircraft by visiting www.gdu-tech.com.
Registering or not will not affect product’s normal use, but we still invite you to be our VIP.
Unscheduled official activities and more privileges have been prepared for you, stay tuned!
Your registration information would be kept strictly confidential.
Safety Overview
1. Environment
Do not fly in severe whether such as rain, thunder, high wind, snow, heavy fog, and the sand
and dust weather.
Do not fly between tall buildings. Doing so may lead to disabling of the GPS and affecting
flight characteristics. Please fly in wide open spaces with no buildings or other tall obstacles.
Always keep the aircraft in direct line of sight and avoid flying over people and water.
Do not fly in places where there are communication base stations of high-tension cable or
launch towers to avoid the interference of the signals from the remote controller.
Please operate with caution when flying above 4000 meters above sea level.

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Do not fly in areas that are restricted by laws or regulations..
2. Caution
Do not answer the telephone or make telephone calls while flying the aircraft. Pay close
attention to the display of the APP interface to ensure safe flight.
Return to base and land as soon as possible when the low battery warning sounds;
The aircraft will land automatically when the battery reaches critical low voltage. The pilot can
guide the aircraft to a safe landing place though;
Turn the aircraft off upon landing and before removing the battery.
In case of an emergency during flight, please use the Return to Home button. DO NOT power
off the motors during flight as the aircraft will come crashing to the ground causing damage and
possible bodily injury.
The propellers spin at a high rate of speed and can cause serious bodily injury. Please maintain
a safe distance from the spinning motors during operation.
3. Maintenance
In case of damage, swell, leakage or other defects of battery, please replace the battery in time.
When starting up the motor without installing propeller, if abnormal sounds occur, it may be
caused by the bearing abrasion, please replace the motor.
Replace deformed and damaged propellers in time.
Please use special cleaning kit to keep the lens clean.

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Aircraft
※Only Advanced and Premium versions are provided with “vision positioning system”.
※Only Advanced 2.0 and Premium versions are provided with “dropping box”.

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Flight mode
GDU Byrd supports the following three flight modes:
1. P mode (positioning mode)
When the GPS signal is good, the GPS module is used to maintain the aircraft’s position;
When the GPS signal is not so good or is lost, it will turn to the visual and acoustic positioning
When both GPS positioning and the vision positioning do not work, only the attitude stabilization
is provided.
2. F Mode (Course lock mode)
In this mode, forward control of the aircraft is related to the direction the pilot is facing and is not
dependent upon the direction of the nose of the aircraft. Forward is forward even if the nose of the
aircraft is pointing backward. This allows new pilots to enjoy flying while learning to control the
orientation of the aircraft. This mode relies on GPS data, so please use it when GPS signal is good.
3. A mode (Attitude mode)
In this mode, GPS positioning and the visual and acoustic positioning are not used and only the
attitude stabilization is provided. It is a manual mode and should only be used by experienced
pilots.
※To change flight modes, please use the FLIGHT MODE switch on the remote control.
RTH mode
GDU Byrd has the function of returning to home automatically. If the home point is recorded
successfully before the flight, then the aircraft will return to home point and land automatically
when connection between the remote and the aircraft is lost. The following three conditions can
cause this to happen: return to home is activated on remote control, when aircraft reaches low
battery and when the aircraft loses contact with the remote control.
1. Home point
Home point refers to the point at which the aircraft has been unlocked for the first time
successfully and in Mode P and the GPS signal is good. Home point will only be logged if starting
off in MODE P. IT WILL NOT WORK IF FLIGHT IS STARTED IN OTHER MODES.
2. RTH mechanism
When this mechanism is started,the aircraft will rise or descend to the pre-set height (if the current
height is lower than the pre-set height, the aircraft will rise to the pre-set height. If it is higher, and
the aircraft will descend to the pre-set height) and it will fly to the point above the home point and
hover for five seconds before slowly landing.

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※Connection between remote controls and mobile equipment are different for different Byrd models
(WiFi/USB connection) and the specific connection is subject to actual conditions.
※When return to home is activated, the aircraft WILL NOT avoid obstacles. Please make sure that the
height is set to avoid any obstacles between you and the aircraft. IF YOU CANNOT SEE THE
AIRCRAFT, DO NOT ACTIVATE RETURN TO HOME.
※Use the parameter adjustment software to change the altitude of the aircraft when return to home is
activated. A safe altitude is dependent upon the environment in which you fly.The return altitude can
be set through the FCS Configuration Software or the Flight setting page in the APP.
3. Return to home (RTH)
During flying, automatic return can be realized by pressing “Return to home” (RTH) button
in the remote control or click the RTH icon on the APP interface.
4. RTH in low battery
Before RTH automatically happens, there is a warning issued to the pilot regarding the state
of the flight battery.
Low battery warning
When the aircraft power is less than 30%, low battery warning will be activated and APP will
send alarm to you, so that you can return ASAP.
RTH in severe low battery
When the electric quantity is less than 20%, the battery is serious low and the aircraft will
return to home automatically.

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5. Out-of-control return
In normal conditions, the GPS signal is good, the compass works normally and the aircraft will
record the home point successfully. If the signal between the remote controller and the aircraft is
interrupted or lost, the aircraft will hover until signal is regained. If the signal interruption lasts for
over three seconds, the aircraft will return to home automatically. During returning, if the signal is
back to normal, the returning will be stopped and the pilot can regain control of the aircraft.
※When GPS signal is not good enough, automatic return won’t work.
Aircraft status indicator
The flight status of GDU Byrd can be judged by two groups of LED indicators at the head and tail
of the aircraft. Their locations are as shown in the following picture.
The two groups of LED indicator lights show the current status of the flight control system
through different groups of colors and flickers. See the following table for more details.

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Vision positioning system
This positioning system consists of the visible light camera and the ultrasonic module. The former
is used to obtain the position information of the flight to provide reference for the horizontal
direction of the aircraft. And the latter will judge the current flight height to provide reference for
the height from the ground to maintain the flight at a certain height.
This system is adaptable to the environment in which the height is lower than 6 meters, where
there is no GPS signal or the GPS signal is not good enough. It is particularly suitable for indoor
flight.

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The precision of the visual and acoustic system can be affected by the illumination intensity and
the surface texture of articles. And the ultrasonic will not measure the distance in certain damping
materials. If both vision and ultrasonic do not work, the flight mode will be turned into the
Attitude mode automatically. Therefore, please notice the following conditions during flight:
The normal flight height of this system ranges from 0.2m to 6m. Please stay in this range when
the aircraft is used indoor;
The illumination condition is 10 lux–100000 lux;
Within the required range of the illumination conditions, all textures could be used to position
the flight except pure colors (such as pure black, pure red, pure white and pure green);
Be cautious on the surface where there is intensive reflected light or inverted images;
The flight speed should not be too fast and the highest speed should not exceed 8m/s(17mph).
The maximum flight inclination should not be more than 30°.
The range of flight temperature is -10℃-55℃(14 F to 131 F).
The flight altitude should not be more than 4000 meters (13,000 feet).
※In Mode P and when the GPS signal is lost or not good enough, the system will turn to the visual and
acoustic positioning mode and no manual operation is needed.
※This system is only open to GDU Byrd Advanced/Premium version.
Stowage dropping
GDU Byrd is able to be loaded with loads less than 500g (not including gimbal and camera) and
deliver objects from a long distance.

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Before the ejection, the buttons C1 and C2 should be customized to choose the ‘steering gear
control’ in the APP setting interface. The objects to be ejected are to be put into the container
carrier and the container is inserted into the steering gear hole. Operate the aircraft to the place
above the ejection point and press C1 or C2 button to let the container break away from the
aircraft. The ejection is finished.
※Stowage dropping function is only applicable to Advance 2.0 and Premium version.

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Remote controller
The remote controller of GDU Byrd is an advanced wireless communication system that features
automatic frequency hopping to realize 3-DOF control of aircraft within control range. It allows
multiple aircrafts to work simultaneously in the same space.
The integrated wireless high-definition video transmission system within the controller is
connected to GDU Pro App via Wi-Fi (via USB data wire for Advance 2.0 and Premium 2.0
versions). You can watch the video in real time on your personal mobile device (mobile phone,
tablet). All parameters of the aircraft will be fully presented on the screen of your device. With
state-of-art folding innovation and delicate design, you surely won’t want to take your hands off it.
※USB connector is only available on the remote controller of Advance 2.0 and Premium 2.0 versions.

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Dual remote controller
※The slave remote controller is not included with the GDU Byrd. For more information, please visit official
shop at www.gdu-tech.com
HD video downlink system
GDU Byrd series products are equipped with a high definition image transmission module which
consists of a transmitter and a receiver. It does 1080P at 60 frames per second. The high-def image
transmission module in GDU Byrd Standard, Advanced 1.0, and Premium 1.0 adopt common
WIFI system and the transmitting distance is 500m for Standard version, and 1000m for Advanced
1.0 and Premium 1.0 versions. This image transmission of high definition module in GDU Byrd
Advanced 2.0 and Premium 2.0 adopt OFDM system and the transmitting distance is 2000m.
Gimbal control
The control dial wheels for the gimbal yaw and pitch could control the yaw and pitch. The
Back-to-center button of the gimbal could let the gimbal return to the initialization place.

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※The type of the gimbal in the above picture is only for indication. Different types of gimbals are used
for different aircrafts with different configurations.
Control of aircraft
There are three different control schemes: American customization, Japanese customization, and
Chinese customization. Definitions of the control sticks of the three modes are as follows:
1. American customization: throttle and yaw on left stick and pitch and roll on right stick.
2. Japanese customization: pitch and yaw for left hand and throttle and roll for right hand.
3. Chinese customization: pitch and roll for left stick and throttle and yaw for right stick

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The default operation mode of the remote controller is the “American customization". You can
modify with the parameter adjustment software or in “Control setting" on your APP. (See APP
control setting for more details)
Link
After leaving factory, the remote controller has been bound to the aircraft and ready to be
used. If the aircraft or the remote controller is replaced, then follow these steps to bind the units
together:
1. Turn on the aircraft.
2. Press and hold the ‘Return to home button’ in the remote controller and then press the ‘the
power switch’ button in the remote controller. At this moment, the remote controller gives a
warning tone, the red LED indicator light is on, and the four indicator lights of the power of the
aircraft in the remote controller flicker sequentially.
3. Press the power button of the aircraft for five times and wait for several seconds for the binding
procedure to finish. At this time, the green LED indicator light showing the status of the remote
controller is on.

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Gimbal camera
There are many high precision triaxial stabilization gimbals for GDU Byrd series aircraft,
with brand new integrated control algorithm. The jittering of the angel is ±0.05 allowing for
stabilized video and photos.
According to the design philosophy of GDU Byrd series, aircraft platform and load mission
have been separated as two parts. The following four gimbals could be used in any type of Byrd’s
platform.
Byrd-001 gimbal
The standard configuration of GDU Byrd Advanced is Byrd-001 multi-function gimbal (without
camera). This gimbal supports GoPro camera that you can buy separately.
What’s more, Byrd-001 Gimbal can realize the controllable two-axis of pitch and yaw, providing