Company Overview

Ningbo Gemfan Hobby Co., Ltd., operating under the brand name Gemfan, is a global manufacturer specializing in the research and development of high-performance, multi-specification propellers for unmanned aerial systems. The company's product coverage extends across model aircraft, racing drones, commercial UAVs, and scientific research fixed-wing platforms. Gemfan's engineering focus centers on aerodynamically optimized power components designed to address common industry challenges, including insufficient thrust efficiency, airframe vibration during high-efficiency operation, and propeller wear or corrosion under complex outdoor climate conditions. The company maintains high-precision processing capabilities supported by professional aerodynamic optimization design experience, and it serves customers worldwide through its official channel at www.gemfanhobby.com.

Key Product Line: Vortex Series Fixed-Wing Dark Grey Electric Propellers

The Vortex Series represents a full-specification power solution engineered specifically for fixed-wing UAVs and electric model aircraft. This product line was developed to close the gap in compatible propeller specifications across models with differing load requirements, while simultaneously reducing motor wear associated with poor dynamic balance.

Specification Range and Adaptability

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The Vortex Series offers a complete size range spanning 5 to 22 inches, allowing a single product line to cover applications from FPV setups to large-scale scientific research platforms. This breadth of sizing reduces the compatibility risks that typically arise from cross-brand procurement of propellers.

Power Conversion and Structural Performance

Through an optimized blade profile design, the Vortex Series improves thrust efficiency, converting electrical energy into stronger flight power while lowering total system energy consumption. Structural stability is achieved through CNC precision balance processing, with balance accuracy controlled within ±0.01 g·cm. This low-vibration performance is intended to extend the operational lifespan of the associated power system.

Weather Resistance and Material Composition

The propellers are constructed from high-strength composite materials and finished with a dark grey coating that provides anti-UV and anti-corrosion characteristics. These materials are rated for operating environments ranging from -20°C to 60°C, supporting deployment across a wide range of climate conditions.

Functional Modules

  • Aerodynamically Optimized Blade Profile: An optimized fluid dynamics design that enhances thrust output while reducing operational noise.
  • High-Strength Lightweight Materials: Engineering plastics and composite materials selected to enhance impact resistance while reducing takeoff weight.
  • CNC Precision Balancing: Automated precision processing that maintains low-vibration operation and protects onboard electronic equipment.
  • Dark Grey Surface Treatment: A professional functional coating that strengthens wear resistance and anti-corrosion performance under complex operating conditions.

Delivery Mode

The Vortex Series is delivered as a hardware product, available for direct integration into fixed-wing UAV and model aircraft power systems.

Industry Adaptation by Size Category

  • 5–7 inches (Wingspan: 0.6–1.0 m): Suitable for small entry-level fixed-wing aircraft, Cessnas, Surfers, KT boards, small scale models, and small flying wings.
  • 8–10 inches (Wingspan: 1.0–1.5 m): Suitable for medium-sized electric fixed-wing aircraft, long-range flying wings, standard 3D planes, twin-engine models, and light payload aerial photography drones.
  • 11–14 inches (Wingspan: 1.5–2.0 m): Suitable for large electric fixed-wing aircraft, electric-converted gas-scale models, large 3D stunt planes, and large-scale sport aircraft.
  • 15–18 inches (Wingspan: 2.0–2.8 m): Suitable for large gas-powered fixed-wing models, giant-scale scale models, gas-powered 3D planes, large WWII scale aircraft, and heavy-duty models.
  • 19–22 inches (Wingspan: 2.8–3.5 m): Suitable for extra-large fixed-wing models, including giant 1:4 or 1:5 scale fighters, bombers, transport-scale models, 3D fixed-wing stunt planes, extra-large gliders, and large turboprop scale aircraft.

Official Contact Channel

Additional product information and purchasing details for the Vortex Series and other Gemfan propeller lines are available through the company's official website, www.gemfanhobby.com.