【Case Study】 Kitefly Tethered · Industrial UAV Application
Can Drones Replace Human Workers in Hazardous High-Rise Cleaning?
Kitefly Tethered Delivers a 24/7 Tethered UAV Solution for Lianyungang Yihai Liangtian
Date: March 10, 2025 | Location: Lianyungang, Jiangsu, China | Client: Yihai Liangtian | System: SF-91X-100M
How do industrial operators eliminate human risk in high-altitude facade cleaning while maintaining continuous operation? On March 10, Kitefly Tethered deployed the SF-91X-100M Tethered Drone System at Lianyungang Yihai Liangtian grain storage facilities — replacing manual rope-access crews with a Continuous Power Drone System capable of 24/7 uninterrupted operation. This deployment demonstrates the real-world reliability of our Industrial Tethered UAV System in high-load industrial cleaning environments.
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On-site deployment at Lianyungang Yihai Liangtian grain storage facility
1. Core Equipment: The Foundation of Industrial Reliability
To meet the demanding requirements of Industrial Cleaning UAV tasks, the SF-91X-100M integrates three core technical modules engineered to maintain stability under high-load field conditions.
SF-91X-100M in operation — facade cleaning at Yihai Liangtian
① Hexacopter Platform: AF-J30 Heavy Lift Drone
· Payload Capacity: Maximum takeoff weight 65 kg; effective payload 30 kg — sufficient to carry high-pressure water jetting tools.
· Precision Positioning: RTK (4G version) integrated, delivering centimeter-level accuracy across large-area Drone Facade Cleaning targets.
· Environmental Resilience: Operating range -20 °C to +50 °C; stable in Level 6 wind conditions.
· Structural Integrity: Carbon fiber + aerospace-grade aluminum alloy; empty weight ≤ 20 kg; folded 820 × 940 × 880 mm for rapid deployment.
AF-J30 Heavy Lift Hexacopter — carbon fiber airframe, ≤ 20 kg empty weight
② Ground Power Station: AF-G30 Tethered Power Supply System
· Unlimited Flight Time: 120 m high-voltage tether cable enables 24/7 continuous operation — no battery swaps.
· High Voltage Architecture: Input 380 VAC; output 1000 VDC; maximum output power 16 kW.
· Intelligent Management: Automatic Tether Winch; Kevlar reinforced tether cable rated at 50 kg tensile strength.
· Robust Build: Complete system weight (including cable) 41.5 ± 1 kg; engineered for sustained industrial-grade operation.
AF-G30 Tethered Ground Power Station — 380 VAC input / 1000 VDC output, 16 kW
③ Airborne Unit: WF-12K Airborne Power Module
· Power Conversion: Input 800–1000 VDC → output 59 VDC / 200 A; stable 12 kW to propulsion and cleaning systems.
· Lightweight Design: 3.21 ± 0.5 kg; dimensions 239 × 204 × 139 mm — maximises effective mission payload.
· Standardised Interfaces: XT90 input + XT150 output; compatible with mainstream UAV power systems.
· Thermal Management: Industrial-grade design ensures stable output under sustained high-load operation.
WF-12K Airborne Power Module — 239 × 204 × 139 mm, 3.21 ± 0.5 kg
2. Tethered UAV vs. Traditional Methods: Key Operational Differences
Compared with rope-access "spider-men" and scaffolding, the Kitefly Tethered solution addresses four critical industry pain points:
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Pain Point
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Traditional Methods
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Kitefly Tethered Solution
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Safety Risk
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High fall & heat-exposure risk for personnel at height
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Zero human presence at height; all operations ground-controlled
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Operational Hours
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Limited by daylight & worker fatigue; frequent breaks
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24/7 continuous via tethered ground power — no battery swaps
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Cost Structure
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High scaffolding cost; specialised high-altitude insurance
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Lower per-mission cost; no scaffolding; reduced insurance
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Deployment Flexibility
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Fixed scaffolding; slow repositioning
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Rapid deployment: grain depots, silos, complex facades
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Completed facade cleaning operation — Lianyungang Yihai Liangtian, March 2025
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