Nanjing Airfly Electronic Technology Co., Ltd.

1. Background & Market Demand With the rapid growth of tethered drone applications in fields such as high-rise cleaning, aerial spraying, emergency communications, and aerial lighting, customers are demanding long-duration, high-power, and highly reliable tethered UAV power systems. Traditionally integrated tethered systems combine the ground power source and winch into a single cabinet, but this design faces bottlenecks such as: · Limited cooling capacity · Restricted power output · Complicated maintenance To overcome these challenges, Airfly Tethered (Nanjing) first proposed the split-type tethered UAV power solution in July 2022, and successfully built the first prototype. In August 2025, the concept was officially productized, bringing a new level of industrial application and market adoption. 2. Airfly Split-Type Tethered Drone Power System – Design Concept The solution adopts an innovative split architecture, separating the traditional integrated tether box into two independent functional units:   (1) Ground Power Unit · Converts external AC380V into DC1000/1500V high-voltage output · Independent cooling system for stable 40–60kW power delivery · Comprehensive protection mechanisms (over-voltage, under-voltage, over-current, short-circuit, over-temperature)   (2) Tethered Winch Unit · Integrated intelligent winch control system with 200–300m automatic cable management · Supports 25A high-current transmission for stable long-distance power delivery · Functions include torque adjustment, passive pay-out, and active retraction, ensuring drone stability during hovering and landing (3) Onboard Power Module (Model: WF-1000S60-24K) · Mounted on the UAV, converting DC1000V high-voltage into DC60V (14S) for onboard equipment · High efficiency ≥97%, lightweight design ≤9.5kg · Built-in safety protection for secure flight operations   3. Key Advantages & Technological Innovations · Cooling Performance: Independent design separates heat sources, eliminating thermal interference and enabling 40kW-class operation · Power Transmission: 200m tether cable supports 25A current for stable 24kW continuous output · Smart Control: Torque adjustment, automatic cable management, and tension control for enhanced UAV flight stability and safety · System Reliability: Split units reduce cabinet complexity, improving overall system reliability and ease of maintenance · Flexible Expansion: Supports both 1000V/1500V input and multiple output voltages (12S~24S), compatible with a wide range of drone platforms 4. System Components & Functions Ground Power Unit · Input: AC380V · Output: DC1000V, max 40kW · Features: High-efficiency conversion, independent cooling, intelligent protection · Installation: Fixed ground deployment Tethered Winch Unit · Cable Length: 200m (expandable) · Transmission Current: 25A · Reel-in Speed: ≥2m/s · Control: Torque adjustment + active retraction / passive pay-out · Portable design with handles for easy transport & deployment Onboard Power Module (WF-1000S60-24K) · Input: DC800–1000V · Output: DC60V / 400A, max 24kW · Features: High efficiency, compact size, intelligent protection · Installation: Drone-mounted 5. Application Scenarios · High-Rise Cleaning: Building maintenance, firefighting, industrial structure cleaning · Emergency Communication: Tethered drones carrying relay equipment to provide emergency coverage · Scientific Research: Atmospheric monitoring, meteorological studies, payload testing (EO/IR sensors, communication pods) · Public Safety & Disaster Relief: 24/7 surveillance, event monitoring, rescue missions 6. Technical Support & Service Guarantee · Complete system integration solutions and customization services · Professional technical team providing full-cycle support · Compliance with GB, IEC, EN safety and EMC standards · Remote diagnostics & firmware upgrades available   7. Conclusion Through its innovative split-type tethered drone system design, Airfly has successfully overcome the bottlenecks of cooling, high-power output, and system reliability faced by traditional integrated systems. This breakthrough enables: · 40kW-class continuous power supply · 200m long-distance high-current transmission · Significantly improved system maintainability and stability As a leading China tethered UAV supplier and power system manufacturer, Airfly provides safe, reliable, and efficient tethered drone solutions for industrial, emergency, and research applications worldwide.  

Building an Air-Space Information Bridge to Empower Emergency Response and Communication Coverage Target Customers · Core Clients: Major mobile network operators such as China Mobile, China Unicom, and China Telecom. · Typical End Users: o Emergency response agencies (fire departments, police, armed police units) o Large-scale event organizers (concerts, sports events) o Mining and energy enterprises o Border patrol and scientific exploration teams Pain Points Signal “Islands” in Critical Scenarios: · Communication Loss in Emergencies: Natural disasters (earthquakes, floods, wildfires, etc.) or accident sites often destroy ground-based telecom infrastructure, leading to large-scale communication blackouts, severely impacting rescue coordination and disaster reporting. · Network Congestion at Large Events: In densely populated areas during concerts or sports events, existing base stations reach capacity, resulting in poor user experience (no signal, dropped calls, slow data). · Signal Blind Spots in Remote Areas: In regions like deserts, mines, forests, mountains, or offshore islands where no public network exists, conventional communication tools fail, making operations, monitoring, and exploration extremely difficult. · Signal Obstruction in Complex Terrain: Mountains, urban canyons, or skyscraper clusters obstruct signals, limiting wide-area coverage. Limitations of Traditional Solutions: · Slow Deployment & High Costs: Emergency communication vehicles or temporary base stations rely on road access and are time-consuming to deploy; fixed base stations in remote areas are costly and time-intensive. · Limited Coverage: Ground-based stations are restricted by height and terrain, limiting signal penetration and coverage range. · Short Endurance: Battery-powered drones typically last High-performance droneHigh-power ground-based tethered power boxLightweight, highly integrated airborne relay module5G base stations (for all three major operators)Military HF/VHF radiosPrivate mesh radiosPolice trunking systems (TeL)Civilian Mesh networksTraditional walkie-talkie repeatersRestores communication in disaster zonesEnhances coverage at large eventsEnables connectivity in remote regionsSupports 3D surveillance networksValidated in real-world operationsEstablishes a new benchmark in emergency and telecom support solutions

Target Customers · Core Clients: o High-rise façade cleaning companies o Large-scale property management groups o Equipment maintenance departments of power and chemical plants · Strategic Clients: o Municipal landmark building administrators o Bridge maintenance authorities o Wind turbine tower cleaning service providers Industry Pain Points Fatal Flaws of Traditional High-Altitude Cleaning: · Severe Safety Risks:Rope-access “spider-men” cleaning has an annual accident rate exceeding 0.8%; in 2024 alone, 584 fatalities from high-altitude falls in China. · Inefficient and Costly:Cleaning a 300-meter skyscraper typically requires a 30-person crew over 15 days, with labor accounting for over 65% of the total cost. · Operational Restrictions:Work halts during bad weather; complex façades (curved glass, hollow structures) are hard to reach; high-risk zones in power/chemical plants restrict manual access. · Environmental and Social Disruptions:Scaffolding blocks traffic; chemical cleaners pollute building surfaces and surrounding environment. Limitations of Conventional Drone Cleaning: · Payload Flight time Water pressure