Mohe, Heilongjiang, the northernmost city in China, in a mid-high latitude（52°10′N- 53°33′N) —is known for its cold climate. Under low-temperature conditions, drone lifting operations place higher demands on propulsion system reliability.

The Ruhong Yun 201 UAV, developed by Ruhong Low-Altitude Intelligent Technology, is powered by HOBBYWING’s latest H15MD Plus coaxial integrated propulsion system. Designed to operate in challenging natural environments, the UAV successfully completed a timber lifting mission in Mohe’s snowfields, demonstrating a practical solution for winter forestry operations.

At a local temperature of –25.8°C and an altitude of 385 m in hilly terrain, the drone completed four transport sorties within 14 minutes, powered by two battery sets. The UAV lifted timbers weighing 50 kg, 157 kg, 200 kg, and 212 kg, covering a total flight distance of 8 km.

Throughout the lifting operation, HOBBYWING H15MD Plus coaxial motors maintained stable and efficient performance, with motor temperatures not exceeding 30°C, ensuring continuous and reliable propulsion support for this UAV platform.

This timber lifting mission in snowy conditions highlights the reliability, efficiency, and environmental adaptability of the HOBBYWING H15MD Plus drone propulsion system, demonstrating an ideal propulsion solution for heavy-lift UAVs in forestry, cargo transport, and emergency response applications.

Yun 201 UAV Key Specs
- Configuration: Quad-axis, 8-rotor
- Airframe Weight: 90 kg (excluding batteries)
- Maximum Takeoff Weight: ≥340 kg
- Maximum Safe Payload: 200 kg
- Hover Time (no payload): ≥40 min
- Endurance with Safe Payload: 8–15 min
- Wind Resistance: ≤ Level 8
- Maximum Operating Altitude: ≤6300 m
- Operating Temperature: –20°C to 55°C

H15MD Plus Propulsion System Key Specs
- Rated Thrust: 80 kg
- Maximum Thrust: 195 kg
- Efficiency: 7.5 g/W
- Applicable Tube Diameter: 80 mm
- Operating Temperature: –40°C to 60°C
- Protection Rating: IPX6