Product Overview

The Gemfan 51377 is an upgraded tri-blade racing propeller engineered to meet the demands of modern FPV competition. With a 3-inch pitch and a 129.7 mm diameter, it is crafted from durable PC material and weighs 4.5 g, offering a balanced blend of thrust, speed, and impact resistance. The blade geometry has been optimized to pair effectively with new-generation racing motors—especially 2207 2100KV setups—ensuring responsive acceleration and stable power delivery throughout the race. Reinforced structural areas enhance durability, allowing pilots to continue flying even after minor collisions.

Key Features

• Updated tri-blade design tailored for competitive racing

• Optimized 3-inch pitch for improved throttle stability

• Reinforced weak points to withstand light crashes

• Durable PC construction for consistent and reliable performance

• Smooth power output suitable for high-speed track flying

Applications

• FPV racing and pre-race training

• High-speed track layouts

• Builds requiring durability and stable response

• Pilots seeking reliable performance under competitive pressure

Features & Advantages

Racing-Optimized Pitch
The 3-inch pitch is tuned to match modern high-efficiency racing motors, delivering improved thrust response and top-end speed.

Reinforced Structure
Thickened critical sections help the prop retain shape and functionality after minor impacts, reducing the chance of race-ending failures.

Stable Power Delivery
The tri-blade configuration provides predictable handling, allowing precise maneuvering through gates and tight corners.

Durable PC Material
Impact-resistant polycarbonate construction ensures long-term reliability, even under the stress of competitive flying.

Wide Motor Compatibility
Standard 5 mm hub design fits popular racing motors including 2207 2100KV and similar setups.

Company Strength

Ningbo GEMFANHOBBY Co., Ltd (GEMFAN) is a leading global manufacturer specializing in drone propeller R&D, design, production, and worldwide distribution.

Highlights:

• Professional Engineering Team: Experts in aerodynamics, material science, and drone propulsion

• Innovation Leadership: Nearly 100 patented designs and continuous FPV product development

• Global Coverage: Products exported to 60+ countries, holding ~60% FPV prop market share

• Industry Recognition: Official supplier for multiple National Drone World Championship teams

• Core Values: Professionalism, quality, innovation, integrity, and service