Model: LH15

　　Wheelbase: 1600mm

　　Payload capacity: 15KG

　　Tethered hovering height: 100 meters

　　Wind resistance: Level 6 wind

　　Hanging time: ≥ 12 hours

　　Onboard power supply power: 8KW

　　Municipal power/generator: AC220V

　　Application scenarios: national defense and military industry, communication relay, optoelectronic reconnaissance, etc.

　　Working principle of Tethered Drone

　　The Tethered Drone is connected to a ground power source through a cable, enabling long-term aerial hovering and mission execution.

　　The mooring box converts the single-phase 220V (or three-phase 380V) AC power provided by the generator (mains power) into high-voltage DC power DC400-1500V and outputs it to the mooring cable. After being stepped down by the onboard power supply, it is converted into a DC stabilized output suitable for Drone Power Supply (such as 50V for 12S), providing a long endurance power supply mode for the drone.

　　Application areas of Tethered Drone

　　The application of Tethered Drone is very extensive, including but not limited to emergency rescue (emergency lighting, emergency communication, high-rise firefighting), military (intelligence surveillance, electro-optical reconnaissance, radar electronic warfare), public safety (relay self-organizing network, environmental monitoring), and civilian (nighttime power repair, high-rise building cleaning/spraying). These application scenarios require drones to remain in a fixed position for a long time to complete specific tasks.

　　LH15 Tethered Drone: Comprehensive Guide to Installation, Maintenance, and Troubleshooting

　　The LH15 Tethered Drone System redefines compact, persistent aerial operations, offering a portable yet powerful solution for continuous surveillance, situational awareness, and communications relay. Designed for rapid deployment and exceptional reliability, the LH15 is the ideal partner for field operations, emergency response, and temporary security details. This all-inclusive guide provides a detailed product introduction, clear installation steps, a structured maintenance schedule, and a systematic troubleshooting guide to ensure you maximize the performance and longevity of your system.

　　Product Introduction: Compact Power, Unmatched Persistence

　　The LH15 is engineered to bridge the gap between highly portable drones and enduring tethered systems. It delivers the critical advantage of multi-hour flight time without the logistical burden of larger systems.

　　Core Design Philosophy and Applications

　　The LH15 is built around the principle of "deployable persistence." Its compact, lightweight design allows a single operator to transport and set up the entire system in minutes, yet it provides the continuous aerial presence typically associated with much larger, vehicle-mounted platforms. Primary applications include:

　　Tactical Security and Surveillance: Providing an elevated, stable camera platform for perimeter monitoring of temporary sites, public events, and critical infrastructure.

　　Emergency Response and Disaster Management: Offering first responders a persistent eye in the sky for assessing damage, monitoring wildfires, and coordinating search and rescue efforts over extended periods.

　　Broadcasting and Live Events: Serving as a cost-effective, stable aerial camera for live broadcasting of outdoor events, offering a unique vantage point for hours on end.

　　Key System Components

　　The complete LH15 system is comprised of three integrated units:

　　The Aerial Vehicle: A compact, rugged quadcopter built from carbon-fiber composites and engineering plastics. It is optimized for aerodynamic efficiency and stability in windy conditions.

　　The Micro-Tether Cable: A lightweight, fiber-optic cable that serves as the drone's lifeline. It provides continuous high-voltage power for indefinite flight and enables secure, low-latency, high-bandwidth data transmission for video and telemetry.

　　The Ground Station: A portable, all-in-one unit containing the power supply, automated tether reel, and the control computer. Its ruggedized design is built for field use, offering multiple power input options including AC mains and DC battery packs.

　　Technical Specifications at a Glance

　　Max Tether Altitude: 50 meters

　　Flight Endurance: Indefinite (Tethered)

　　Payload Capacity: 0.8 kg

　　Wind Resistance: 12 m/s

　　Setup Time: < 5 minutes

　　Noise Level: < 65 dB at 10 meters

　　Primary Power Options: 110V/220V AC or 48V DC Battery

　　Installation and Deployment Steps

　　A correct setup is crucial for safe and optimal operation. Follow these steps for a successful deployment every time.

　　Step 1: Site Selection and Pre-Deployment Check

　　Choose a Suitable Location: Select a clear, open area with a radius of at least 10 meters, free from overhead obstacles like power lines and tree branches. Ensure the ground is firm and level.

　　Inspect Components: Perform a quick visual inspection of the drone, tether, and ground station. Check for any obvious physical damage.

　　Verify Power Source: Connect the ground station to a stable power source. If using a generator, ensure it is placed downwind to avoid exhaust interference.

　　Step 2: Ground Station Setup and Power-On

　　Position the Ground Station: Place the unit on a stable, level surface. Orient it according to the operator's planned position for optimal line-of-sight.

　　Connect Power: Plug the power cable into the grounded outlet or connect the DC battery pack. Ensure all connections are secure.

　　Power On: Switch on the ground station. The system will perform a self-check; wait for the indicator light to signal a ready state.

　　Step 3: Tether and Drone Preparation

　　Unlock the Drone: Remove any transportation locks from the drone's arms and propellers.

　　Connect the Tether: Attach the tether's connector to the drone's power/data port, ensuring a firm, click-in connection.

　　Clear Launch Path: Ensure the tether is laid out straight and clear of snags for the first few meters.

　　Step 4: System Activation and Automatic Takeoff

　　Initialize System: On the connected tablet or laptop running the Ground Control Station (GCS) software, select the "System Start" command.

　　Automatic Takeoff: The GCS will provide a status update. Once "Ready for Takeoff" is displayed, press and hold the "Auto Takeoff" button. The drone will automatically power up its motors, ascend to a pre-set low-altitude hover (e.g., 5 meters), and await further commands.

　　Ascend to Operational Altitude: Use the altitude slider in the GCS to command the drone to its final operational height. The automated reel will manage the tether deployment smoothly.

　　Scheduled Maintenance and Care Frequency

　　Proactive maintenance is the key to the LH15's legendary reliability. Adhere to this frequency-based schedule to prevent issues before they arise.

　　Before/After Every Flight (100% Frequency)

　　Visual Inspection: Check the drone's airframe and propellers for damage.

　　Tether Check: Run the first and last 5 meters of the tether through your fingers, feeling for abrasions or kinks.

　　Connector Check: Ensure the tether connector is clean and undamaged.

　　Every 50 Flight Hours or Weekly (High Frequency)

　　Detailed Propeller Inspection: Remove and flex propellers to check for hairline cracks.

　　Motor Inspection: Spin motors manually to feel for rough bearings or debris.

　　Fastener Check: Verify the tightness of critical screws on the drone and landing gear.

　　GCS Software Update: Check for and install the latest software and firmware updates.

　　Every 200 Flight Hours or 6 Months (Medium Frequency)

　　Full System Functional Test: Perform a comprehensive check of all flight modes, communication links, and payload functions.

　　Deep Tether Inspection: Visually inspect the entire length of the tether under good lighting.

　　Ground Station Ventilation Check: Clean any dust from the ground station's air vents and fans.

　　Battery Calibration (if applicable): Fully cycle and calibrate any DC battery packs.

　　Every 12 Months or 500 Flight Hours (Low Frequency / Annual Service)

　　Factory-Level Service: We strongly recommend sending the entire LH15 system to an authorized service center for a comprehensive inspection. This includes advanced diagnostics, sensor re-calibration, and stress testing of all electronic components.

　　Systematic Troubleshooting Guide

　　Use this logical flow to diagnose and resolve common operational issues.

　　Problem 1: Drone Fails to Initialize or Power On

　　Step 1: Check all power connections to the ground station. Ensure the outlet is live.

　　Step 2: Verify the tether is firmly connected to both the drone and the ground station.

　　Step 3: Listen for any sounds from the ground station. If completely silent, the internal fuse or circuit breaker may have tripped; consult the manual for location and replacement instructions.

　　Problem 2: Intermittent or Lost Video Feed

　　Step 1: Check the GCS software for signal strength indicators. A weak signal suggests a tether data line issue.

　　Step 2: Land the drone and reseat the tether connectors at both ends. Dust or a loose connection is a common cause.

　　Step 3: Inspect the tether along its length for sharp bends or visible damage to the outer jacket, which could affect the internal fiber-optic line.

　　Problem 3: Unstable Hover or "Position Hold" Inaccuracy

　　Step 1: Check the GNSS (GPS) signal strength in the GCS. Ensure you have a strong signal from multiple satellite constellations (10+ satellites). Move to a location with a clearer view of the sky if needed.

　　Step 2: Check for strong magnetic interference from nearby power lines, large metal structures, or the generator. Relocate the ground station if necessary.

　　Step 3: Perform an on-site compass calibration in a clean magnetic environment, following the on-screen instructions in the GCS software.

　　Problem 4: Automated Reel Malfunction

　　Step 1: Ensure the reel is not physically obstructed. Clear any debris.

　　Step 2: Check the reel tension settings in the GCS software. An incorrect setting can cause erratic behavior.

　　Step 3: If the reel does not respond, power down the entire system and restart. If the problem persists, contact technical support.

　　When to Contact Support:

　　If the issue remains unresolved after following these steps, or if you encounter critical warnings (e.g., motor failure, critical battery level on backup power), land the drone immediately and contact our technical support team with a description of the problem and any relevant error codes from the GCS.

　　Conclusion: Your Partner in Persistent Flight

　　The LH15 Tethered Drone System empowers your team with a simple-to-deploy, yet incredibly powerful, aerial asset. By understanding its capabilities, following the straightforward installation process, adhering to the scheduled maintenance plan, and utilizing this logical troubleshooting guide, you will ensure that your LH15 remains a dependable and mission-ready tool for years to come. Invest with confidence in a system designed for reliability and supported by a clear framework for care and operation.