United Aircraft

Company overview

Shenzhen Lianhe Feiji Keji Youxian Gongsi operates under the United Aircraft brand. Shenzhen Lianhe Feiji Keji Youxian Gongsi develops agricultural drones and rotor systems for unmanned helicopters. Its Q100P combines spraying, spreading, transport and aerial surveying in a multipurpose agricultural platform. Applications include pesticide application, fertilizing and seeding in fields and orchards, aquaculture feed distribution, forest pest control, and agricultural transport in mountainous areas and rural communities.

The Q100P uses a 7-series aluminum alloy body, 56-inch propellers and a mobile integrated takeoff and landing platform. It has an empty weight of 43 kg, a maximum flight radius of 2 km, wind resistance of 6 m/s and an operating temperature range of 0–40°C. Its body has an IP55 protection rating, and its 30 Ah, 68.4 V battery system supports 5C fast charging. Millimeter-wave radar provides obstacle avoidance with a specified effective height of at least 1.5 m, while terrain following supports mountain slopes up to 15°.

The company's rotor work covers aerodynamic and dynamics design, composite blade manufacturing, hub and control development, and strength, fatigue and flight-load testing. Its TD220 is a 350 kg-class general-purpose coaxial unmanned helicopter with a semi-articulated rotor hub and electronically controlled coaxial rotor technology. The T333 uses a 10.2 m bearingless rotor with integrated composite flexible beams and the same family of control technology. The company has also developed a 6.4 m hingeless rotor system for a 550 kg-class coaxial helicopter, with repeated flight tests at speeds from 0 to 50 m/s.

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