GDU Tech S400E Quadrotor UAV Portable Drone Camera

Specifications

• Product Name: E Quadrotor UAV v1.0 2023.11
• Maximum Battery Life: 49 minutes
• Flight Control Radius: 15 km
• Maximum Flight Speed: 23m/s
• Wind Resistance: Level 7
• Payload Capacity: 3kg

Product Overview
This chapter introduces the functional characteristics of the E Quadrotor UAV v1.0. It includes guidelines for aircraft instruction, names of parts of the aircraft, and the remote controller.

Function Highlights

1. Relay networking and cross-barrier communication: Utilize the relay for cross-barrier communication in mountainous areas.
2. Obstacle avoidance day and night: Integrated millimeter-wave radar and binocular visual obstacle avoidance technology for precise obstacle sensing.
3. Flight Time: 49 minutes with a durable propulsion system.
4. Flight Speed: Maximum speed of 23m/s with wind resistance up to Level 7.
5. Portability: Lightweight and portable design with all devices fitting in one pack bag.
6. Payload Compatibility: Supports multiple payloads including quad-sensor camera, thermal & visible dual camera, and 8K visible camera.
7. Intelligent Docking Station: Enables accurate takeoff and landing with unattended operation.

Product Usage Instructions

Preparation of the Aircraft
Before using the E Quadrotor UAV v1.0, ensure the left and right landing gears are properly installed as per the provided instructions.

Control of the Aircraft
To control the aircraft, use the remote controller and follow the guidelines provided in the user manual. Ensure compliance with local aviation regulations.

Control of the Gimbal Camera
To control the gimbal camera, refer to the instructions in the user manual. Adjust settings as needed for optimal performance.

IP Rating:
The E Quadrotor UAV v1.0 has an IP rating for dust and water resistance. Refer to the specifications for detailed IP rating information.

Description of the Remote Controller Display Screen
Understand the information displayed on the remote controller screen to monitor the status of the aircraft during flight. Familiarize yourself with the symbols and indicators for effective control.

FAQ

Q: Do I need to register my UAV?
A: Yes, as per regulations, all UAV owners must register their real name and relevant information in the official government UAV registration system and display the registration mark on the aircraft.

Warning
Thank you for using this GDU product. This product is a special electronic product. Improper operation may result in property damage, personal injury, or even death. The user will bear the legal consequences of these actions. This product must not be used by juveniles under the age of 18. In order to ensure a positive operating experience and to protect your personal safety, please carefully read the following documents before use:

• Disclaimer and Safety Guidelines
• Item List
• User Manual
• Quick Start Guide
• Intelligent Battery Safety Guide
• This document is subject to updates without notification. Please refer to the latest version at www.gdu-tech.com.

UAV legal registration
As per the Provisions on Real-time Registration Management of Civil Unmanned Aerial Vehicles of the Civil Aviation Administration of China, all UAV owners must register their real name and fill any related information at time of purchasing their UAV in the official government UAV registration system (https://uom.caac.gov.cn/), and paste the registration mark on the hull of the UAV.

Product Overview

This chapter mainly introduces the functional characteristics of the product, the guidelines for aircraft instruction, as well as the names of parts of the aircraft and the remote controller.

Introduction

The S400E is equipped with an advanced flight control algorithm, camera processing algorithm, gimbal stabilization algorithm, and visual AI algorithm. By integrating an omnidirectional obstacle avoidance system, high-precision RTK system, and visual positioning system, this product is capable of automatic patrol inspection, AI intelligent object recognition and tracking, automatic return, automatic precision landing, and other autonomous flight functions. In addition, visual assistance positioning, visual omnidirectional obstacle avoidance, and other functions ensure a safer and more stable flight of the UAV. The portable fuselage is easy to fold and carry. The maximum battery life is 49 minutes (1), and the flight control radius is 15 km (2). As it can be used with different types of payloads, this product can meet the needs of different industries in complex Applications and various scenarios.

1. The maximum battery life is affected by the environmental climate, and the reference value is 49 minutes.
2. The flight control radius of 15 km was measured in an open environment using line of sight operation in a straight-line range test at an altitude of 200 m.

Function highlights

1. Relay networking and cross-barrier communication: Use the relay to realize the cross-barrier communication and networking where mountains are completely blocked.
2. Obstacle avoidance day and night with everything under control: Integrate millimeter-wave radar and binocular visual obstacle avoidance technology, enabling accurate sensing of obstacles at night.
3. 49-minute flight time and durable propulsion: High-efficient propulsion system in the UAV ensures a super-long flight.
4. 23m/s flight speed and robust flight: The maximum flight speed is 23m/s, and the wind resistance is up to Level 7.
5. Lightweight and portable One pack bag can accommodate all devices and tools with the overall size (folded) as small as a piece of A4 paper.
6. Multiple payloads and robust functions: The payload is 3kg . It supports dozens of payloads, including quad-sensor camera 1K thermal & visible dual camera, and 8K visible camera. (3)
7. Megapixel infrared light camera captures every detail: The megapixel thermal & visible dual camera has an effective pixel up to 1280×1024, which is 4 times of the highest pixel of infrared payloads on the market. It is capable of working day and night, and capturing every details of an object.
8. Intelligent docking station and unattended operation: When the UAV is used with the intelligent docking station, it is capable of accurate takeoff and landing day and night with non-stop and unattended operation.
   ③ The payload is 3kg. The aircraft will restrict its flight speed to ensure flight safety.

Preparation of the aircraft

Installation of the left and right landing gears

1. Insert the landing gear into the landing gear connection base.
2. Push the landing gear locking ring into the seat of the landing gear connection base indicated by the direction arrow, and rotate it based on the locking direction indicated on the fuselage.
3. Align the orange point on the landing gear to the orange point on the fuselage to complete the installation.

Unfolding and locking of the arms

1. Unfold the arms one by one.
2. Push the arm locking ring into the seat of the arm connection base indicated by the direction arrow, and rotate it based on the locking direction indicated on the arm.
3. Align the orange dot on the drone arm with the orange area marked on the fuselage to complete the arm unfold and lock.

 Unfolding of the propellers

Before a flight, make sure that the arms, propellers, and landing gears are all unfolded and locked in position properly.

Installation/removal of the gimbal camera

1. Insert the micro-SD card based on the position shown on the gimbal.
2. Press the payload unlocking button to remove the protective cover.
3. Align the red point on the payload interface and insert the gimbal into the installation position.
4. Rotate it by 90° based on the direction shown on the casing to lock it.
5. Press the payload mount adaptor button, and rotate the gimbal by 90° based on the direction shown on the casing to remove it.

• When the payload mounts are aligned, manually rotate the payload interface connector by 90° and install the gimbal.
• The gimbal camera models shown in the figure are only for purposes of illustration.
• It is required that the aircraft be powered off before mounting the gimbal.
• Please power off the aircraft before inserting or removing a micro-SD card. High-speed micro-SD cards of Samsung, SanDisk and other brands are supported.

Installation of intelligent batteries/checking of battery levels

Battery installation/removal
Battery installation: Put the battery into the battery compartment and push it horizontally until you hear a “click” sound. The installation is complete when the latches on both sides of the battery snap up.

Battery removal
Press the latches on both sides of the battery and pull the battery outwards to remove it.

Checking battery levels
Press the battery power button once to display the current battery level.

Powering on

• Powering on: Press the battery power button once, and press and hold the power button for 3 seconds. At this point, you will hear a beep sound, and the aircraft indicator light is up.
• Powering off: Press the battery power button once, and press and hold the power button for 3 seconds to power off. After powering off, the aircraft indicator light is off.

Pairing
When the aircraft is powered on, press the aircraft power button 8 times continuously. The aircraft will enter the pairing status, and the aircraft status indicator light is solid white. At this point, there are two pairing ways:

1. When the remote controller is powered off, press the power button and return button at the same time, until the remote controller indicator lights blink alternately. At this point, the remote controller enters the pairing status. After the pairing is successful, the aircraft indicator light is solid green, and the pairing completes.
2. After the aircraft enters the pairing mode, power on the remote controller and connect the same to the App. On the flight interface of the App, click “Settings” – “Remote Controller Settings” – “Remote Controller Pairing” to start pairing. After the pairing is successful, the aircraft indicator light is solid green.
   • When the remote controller and the aircraft are purchased in the form of combo, it is defaulted to be paired with the aircraft during ex-factory.
   • This linking method is applicable to the case when a single aircraft is paired with a single set of remote controller. For the pairing between several aircraft and remote controllers, please refer to Advanced Network Mode (p31).

Aircraft parts

1. Propeller
2. Motor
3. Arm
4. Video transmission antenna
5. Landing gear
6. Side radar
7. Upward TOF
8. RTK antenna
9. Front radar
10. Front visual system
11. Payload interface
12. Video transmission master/slave button – debugging interface
13. Battery buckle
14. Intelligent batteries
15. Battery level indicator light
16. Battery power button
17. Rear visual system
18. Rear TOF
19. Bottom auxiliary light
20. Downward visual system
21. Underneath TOF
22. Rear arm indicator light
23. Front arm indicator light

Remote controller parts

1. External antenna of remote controller Transmits the control signals and video transmission wireless communication signals between the aircraft and remote controller.
2. Touch display screen
   Displays the system and App-related screen, and support 10-point touch control. If there is water on the screen during use, wipe it clean to avoid affecting the touch function.
3. Status indicator light
   Displays the remote controller’s system status. For details, refer to the “Remote Controller Indicator Light” section.
4. Battery level indicator light
   Display battery level of the aircraft.
5. Flight mode switch
   Switch flight modes. Includes T mode (Tripod), P mode (Standard) and S mode (Sport), A mode (attitude),which can be customized in the App.
6. Return button / system function button Click to return to the previous interface, and double click to return to the system’s homepage. For combination buttons using the return button and other buttons, refer to the “Remote Control Button Function” section for details.
7. Control stick
   Switch flight modes in GDU Flight II.
8. E-stop button
   Press once and the aircraft will carry out emergency braking and hover in place (when the GNSS or vision system is in effect).
9. L1 / L2 / R1 / R2
   Check the functions corresponding to the buttons in GDU Flight II.
10. Intelligent return button
    Press and hold to start intelligent return, and press once to cancel intelligent return.
11. Confirm button
    Click to confirm the current operation.
12. 5D button
    Up, down, left, right and re-center.
13. Power button
    Press once to turn on / off the remote controller display screen. When the remote controller is powered off, press and hold the power button for 3–5s to power it on; when the remote controller is powered on, press and hold the power button for 3–5s and click the “Off” button displayed on the remote controller screen to power it off; when the remote controller is powered on, press and hold the power button for 8s for forced shutdown.
14. Photograph button
    Press to take photos.
15. Video button
    Start or stop recording.
16. Left dial wheel
    Toggle to adjust the gimbal camera’s pitch angle.
17. Right dial wheel
    Toggle to adjust the gimbal camera’s EV value.
18. Pickup
    Avoid foreign matter blocking during use, which may affect the pickup effect.
19. Lanyard hole
    It is used for installing the remote controller strap.
20. Handle
21. External battery of remote controller
22. C1 / C2 button (customizable)
23. Speaker
24. DC charging interface
25. USB-A interface
    Connect to mobile devices, USB card readers or network transfer output.
26. HDMI interface
    Output a HDMI signal to the external display.
27. TYPE-C interface
    It is used for Android system debugging, external extension and connecting to a charging device to charge the remote controller.
28. SIM card
    Connect to the mobile network.
29. SD card
    The microSD card can be inserted.

This chapter introduces various functional characteristics of the flight control system, visual system and intelligent battery in the aircraft.

Aircraft overview

The S400E aircraft mainly consists of a flight control system, a communication system, a visual system, an image processing system, a propulsion system and a battery system. This chapter introduces the functions of various components on the aircraft in detail.。

Aircraft indicator light
The fuselage has a total of 4 front and rear arm indicator lights, and their positions are shown in the figure.
The front and rear arm indicator lights indicate different flight status. For the specific meanings, please refer to the table below:

The front arm indicator light is solid red, indicating the aircraft nose heading.

Flight modes

The aircraft has the following flight modes, which can be switched manually through the remote controller and the GDU Flight II App. Details are as follows:

1. A mode (attitude)
   The forward / backward obstacle sensing system, GNSS positioning and downward visual positioning system do not work; when the aircraft is off the navigation control, it will drift in the horizontal direction if the control stick is not pushed. It is required to use the control stick for real-time control.
2. P mode (standard)
   If the GNSS signal is strong, the aircraft will be positioned through GNSS; if the GNSS signal is weak and the light conditions meet the needs of the intelligent visual positioning system, the intelligent visual positioning system will be used. If the GNSS signal and visual assistance positioning fail, the aircraft will automatically switch to the A mode to be controlled by a professional pilot.
3. S mode (sport)
   The S mode is the enhanced mode under the P mode. The aircraft performance is enhanced, and the GPS and the downward vision positioning system is functioning. The aircraft’s control sensitivity value is prompted, and the flight response is quick. Please fly with caution. In this mode, the obstacle avoidance system is disabled, and the aircraft is unable to avoid obstacles automatically
4. T mode (tripod)
   The tripod mode restricts the aircraft’s maneuvering performance on the basis of P mode to make the aircraft shooting more stable.
5. V mode (Vision)
   The V mode refers to vision positioning mode. When the GNSS signal is weak, and aircraft altitude is lower than 9 m, the system will automatically switch to the V mode. At this point, the aircraft’s maximum speed is restricted to 10 m/s.

Special note
A mode (attitude) description

1. The A mode is a professional mode. Please do not switch to this mode in non-special conditions.
2. When the GNSS satellite signal is weak or the compass is interfered, and the vision positioning conditions are not met, the aircraft will enter the attitude mode in a passive manner.
3. The user can use the flight mode switch button on the remote controller to manually switch to the A mode. In this mode, the aircraft is likely to be interfered, and will drift in the horizontal direction. In addition, the visual system and some intelligent flight modes will not work. Hence, the aircraft cannot achieve fixed-point hovering and automatic braking on its own in this mode. The user needs to manually control the remote controller to hover the aircraft.
4. In this mode, it is much more difficult to control the aircraft. The user must be familiar with the aircraft behavior in this mode and be capable of operating the aircraft skillfully. The user should never fly the aircraft for a long distance to avoid the loss of determination of the aircraft attitude, which may cause a risk.
5. Once the aircraft enters the attitude mode in a negative manner, please land the aircraft as soon as possible to a safe place so as to avoid accidents. Meanwhile, avoid flying the aircraft in a narrow, semi-obstructed environment, or an environment with weak GNSS satellite signals to avoid entering the attitude mode in a passive manner, which may result in flight accidents.
6. When the aircraft triggers the vision mode, it can only be switched to the A mode. The other modes do not work.

S mode (sport) description

1. The user must note that, when flying the aircraft in the S mode (sport), the visual obstacle avoidance will not work. The aircraft will not actively brake. The user must take note of surrounding environments and operate the aircraft to avoid obstacles along the flight route.
2. The user must note that, when flying the aircraft in the S mode (sport), the aircraft’s flight speed is much increased than that in the P mode (standard). As such, the braking distance is greatly increased. When flying the aircraft in a windless environment, the user should reserve at least 50 m braking distance to ensure flight safety.
3. The user can switch the P mode to the S mode for operation only after getting familiar with the aircraft characteristics and various flight modes.

V mode (vision) description
The V mode is an auxiliary positioning mode and will be automatically triggered when the GNSS signal is weak. Once the GNSS signal is effective again, the aircraft will automatically switch back to the GNSS mode.

Automatic return
The aircraft comes with an automatic return function. There are four methods to execute the automatic return, that is “one-button return”, “low power return”, “lost communication return” and “accurate return”.
During takeoff, the aircraft will record the GNSS coordinates, which correspond to the return point (also called “HOME point”). If automatic return is triggered, the aircraft will automatically return to the HOME point, which is only valid for this flight.

• The HOME point is generated only for effective GNSS coordinate records. When the GNSS signal is weak before the aircraft takeoff, the aircraft will take off in the A mode or the V mode. Then, the position of the recorded HOME point is the coordinate point that takes effect for the first time during the flight process, and not the takeoff point.

1. One-button return
   Automatic return can be triggered during the flight process by pressing the “Return” button on the remote controller or by clicking “ ” in the APP. During the return process, the user can use the “Control stick”, “RTH” button or the app interface to exit the return cycle and regain active control.
2. Low power return
   Two mechanisms are provided: low power return and emergency low power landing.

Low power return
When the intelligent battery’s battery level is too low to return the aircraft,the user should land the aircraft as soon as possible. To prevent unnecessary dangers due to insufficient battery level, the aircraft will intelligently determine whether the current battery level is sufficient based on the flight position information. If the current battery level is only sufficient for the aircraft to return, the GDU Flight II App will remind the user whether to return or not. If the user makes no choice within 15 seconds, the aircraft will automatically return after 15 seconds. During return, the user may press the intelligent return button on the remote controller or click Cancel Return on the App to exit return. Intelligent return only occurs once in the same flight process. If the user cancels the low power return prompt and continues the flight, the aircraft may be forced to land during the return due to an insufficient battery level, resulting in aircraft loss or crash.

Emergency low power landing
In case of emergency low power, the aircraft will be forced to land, which cannot be canceled. During the returning and descending process, the user can use the remote controller (if the remote controller signal is normal) to control the aircraft.

Low battery alert
When the aircraft is at a low battery level status, the aircraft signal indicator light will blink red slowly. When the aircraft is at a emergency low power status, the aircraft signal indicator light will blink red quickly.
The low battery alert threshold can be set on the App interface. The ex-factory default low battery alert value is 20%, and the emergency low power landing alert value is 5%.

Lost communication return
During the flight process, if the remote controller is disconnected from the aircraft, the aircraft will trigger a lost communication return (It is required to set the lost communication action to return in the App). During the return process, if the signal connection between the remote controller and the aircraft restores to normal, the aircraft will continue to return. During the return process, the user can press the intelligent return button on the remote controller or click Cancel Return on the App interface to cancel the return.

Accurate return
In the App, the user can set the return mode to accurate return. In this mode, the aircraft will accurately land after returning to the HOME point. The user should ensure that when the return mode is selected or modified, there is an accurate landing 2D code at the HOME point.

Obstacle avoidance during return
With the obstacle avoidance during return, the aircraft can automatically avoid the obstacles ahead and return safely. By default, the obstacle avoidance during return is enabled.

• The obstacle avoidance capacity during return is related to the obstacle scenario. The obstacle avoidance capacity varies in different scenarios. The return speed can be set between 5m/s and 15m/s.
• The return speed can be set to 15m/s when the aircraft flies above highly-reflective objects, such as buildings, and metal pole tower.
• The return speed can be set to 12m/s for slightly weak reflective objects, such as glass buildings, trees, and telegraph poles.
• The return speed can be set to 7m/s in forests, brushes, and other scenarios with a large area of green plants.
• The return speed can be set to 5m/s in sparse vertical bars of obstacles, such as reinforcing steel bars in buildings under construction and sparse tress.
• The obstacle avoidance capacity during return will be sharply weakened at night. It is recommended to set the return speed to 5m/s at night.

Automatic return process

1. The aircraft records the HOME point.
2. Trigger automatic return conditions (by pressing the remote controller button trigger, or by a low power alert and lost communication).
3. The aircraft confirms the HOME point, and automatically adjusts the nose direction.
   • When the horizontal distance between the aircraft and the HOME point is greater than 20m, and the actual altitude is higher than the pre-set return altitude, the aircraft will return at the current altitude; and if the actual altitude is lower than the pre-set return altitude, the aircraft will ascend to the return altitude before returning.
   • When the horizontal distance between the aircraft and the HOME point is greater than 5m and less than 20m, and the actual altitude is higher than the pre-set return altitude, or the actual altitude is lower than the pre-set return altitude but greater than 20m, the aircraft will return at the current altitude; and when the aircraft altitude is less than 20m, the aircraft will ascend to 20m before returning.
   • When the horizontal distance between the aircraft and the HOME point is less than 5m, click the return button to immediately land the aircraft in place, and the one-button landing can be interrupted.

The text below uses the intelligent return process as an example for illustration.

• The user can toggle the control stick during the descending process to move the aircraft to a more Appropriate position before landing.
• The color range on the battery energy tank and the estimated remaining flight time information will be dynamically adjusted based on the aircraft’s flight altitude and the distance to the HOME point.

Vision sensing system
Visual system, millimeter-wave radar and infrared sensing system

The vision sensing system consists of cameras which are located in the front, rear, and bottom of the aircraft fuselage, and are used for sensing the obstacles and position the aircraft through visual image ranging.
The millimeter-wave radars are located at the front, left, and right side of the aircraft fuselage and emit section electromagnetic wave for handling return signal and sense the obstacles.
The infrared sensing system is located at the rear, upper and lower part of the aircraft fuselage and is of the infrared TOF technology ranging to sense obstacles and the aircraft’s flight altitude.

Detection range
The detection range of the visual system and the millimeter-wave radar are shown in the figure below. When the obstacle is outside of the sensor’s detection range (white), the aircraft will be unable to sense the obstacle. The user should fly with caution, and pay attention to flight security.

Obstacle avoidance function
The obstacle avoidance function only works in standard mode. It is required to enable the visual obstacle avoidance in the GDU Flight II App. At the same time, the user should enable the obstacle avoidance strategy button, the aircraft will automatically brake when encountering an obstacle in the flight route.

• If the obstacle avoidance strategy button is not enabled, only the obstacle position will be displayed and only an alert will be prompted. However, the aircraft will not actively avoid obstacles.

Usage scenario of obstacle avoidance function
The visual obstacle avoidance is Applicable to well-lit scenarios, and the obstacles encountered on the flight route must not be too sparse. When the light is too dark, obstacle information is only provided through the millimeter-wave radar and the infrared sensor. It is recommended to set the aircraft’s safety distance in the GDU Flight II App to be greater than 2.5 m. To obtain better obstacle avoidance experience, it is recommended to set the flight altitude to be greater than 10 m.

During manual flight, the user can freely control the aircraft. Therefore, the user should always pay attention to the flight speed and direction, and use the obstacle avoidance function Appropriately to prevent the obstacle from entering the sensor blind area, which may result in a collision.
When the aircraft is close to the obstacle, it will automatically brake in an urgent manner until hovering. After the aircraft is hovered, the user will be unable to get the aircraft close to the obstacle by pushing the control stick, and the user can push the control stick to fly the aircraft away from the obstacle to regain the control right.

Precautions for obstacle avoidance function usage

1. The visual system measurement is prone to be affected by the intensity of light and the texture of the surface. For example: When the obstacle surface is solid color with weak texture or strong reflection, the ambient light changes sharply and there is strong light, the obstacle is too tidy, or the visibility is too low, the visual system’s obstacle detection will be affected or become invalid. Please use with caution.
2. The detection distance of the millimeter-wave radar depends on the obstacle size and material. For example: For strongly reflective objects (such as buildings, trees, telegraph poles), the effective detection distance is about 60m; for weak reflective objects (such as dead branches), the effective detection distance is 20m. Outside the effective detection distance, please use the radar with caution as the detection of obstacles may be affected or invalid.
3. The infrared sensing system must be used with large obstacles that have high reflectivity. For example: For obstacles with a strong absorption of light on surfaces, small obstacles, and transparent objects, please use the infrared sensor with caution because the detection of obstacles may be affected or invalid.
4. The obstacle avoidance function does not work indoors.
   • lease make sure that the visual system camera lens is clear and clean. The shell case outside the radar module is clean and free of cracks, dents, or deformation.
   • During usage, please do not cover the visual system camera and infrared ranging sensor, which will cause visual function errors and failure of the near-ground slow descent function, which will affect normal flight.
   • If the fuselage is installed with other devices, please avoid covering the radar FOV. If the radar FOV is obstructed, the radar’s obstacle sensing performance will be impaired. Please fly with caution.
   • Maintain control over the aircraft throughout the flight process. Do NOT rely solely on the information provided by the GDU Flight II app. Please determine the aircraft’s flight status based on observations using the naked eye and avoid obstacles in time.

Obstacle information display

• After the obstacle avoidance function is enabled in the App, a radar chart will Appear on the flight interface to display the detected obstacle.
• When the obstacle distance is greater than the alarm distance, the obstacle is displayed as a green point.
• When the obstacle reaches the alarm distance, it is displayed in yellow.
• When the obstacle Approaches the obstacle avoidance braking distance, it is displayed in red.
• The obstacle avoidance alarm distance and obstacle avoidance braking distance can be set in the GDU Flight II App.

 Flight data
The App has a flight data recording function. During use, flight logs are stored in the App and can be checked and exported using the remote controller App

Propellers

Propeller usage instructions
The aircraft is provided with 1866 propellers, which ensure takeoff and landing at an altitude of 5000 m. The wind speed in the flight environment should be ≤ 12 m/s.
The aircraft comes with folded propellers, which are divided into A propellers and B propellers. Please install them based on the markings on the corresponding motor.

Replace propellers
Please use H2.5 internal hexagon head wrench to replace the propellers. It is recommended only to replace propellers in an emergency situation during a field operation. After an emergency flight, please contact GDU technical support for repair as soon as possible.

• Please use the propellers provided by GDU. Do not use propellers from different models.
• The propellers are consumables. If necessary, please purchase separately
• Before each flight, make sure to check whether the propellers have been installed correctly and firmly.
• Before each flight, make sure to check that the propellers are in good condition. Replace aged, damaged, or deformed propellers before the flight.
• DO NOT approach rotating propellers or motors to avoid injury.
• The propellers are thin and slightly sharp. Please operate with caution to avoid being scratched.
• Except in emergencies, do not replace propellers on your own. If required, it is recommended to return the product to the factory for replacement.

Documents / Resources

GDU Tech S400E Quadrotor UAV Portable Drone Camera [pdf] User Manual S400E, S400E Quadrotor UAV Portable Drone Camera, Quadrotor UAV Portable Drone Camera, UAV Portable Drone Camera, Portable Drone Camera, Drone Camera, Camera

References

• User Manual