Product Overview
The Gemfan Flash 7042 is a bi-blade propeller engineered to achieve an optimal balance between lightweight construction, high power efficiency, and broad motor compatibility. Crafted from durable Polycarbonate (PC), it is ideally suited for pilots who prioritize stable, predictable flight characteristics and seek favorable endurance performance for long-duration flights.

Key Features

• Model: Flash 7042

• Blade Count: 2

• Diameter: 7.0 inch (~177.8 mm)

• Pitch: 4.2 inch

• Weight: ~5.52 g (per propeller)

• Material: Polycarbonate (PC)

• Hub Thickness: 7.5 mm

• Blade Width: ~18 mm

• Mounting Interface: 5 mm shaft hole (M5)

• Compatible Motor Size: 2407 to 2408

• Packaging: 2 CW + 2 CCW per pack

Applications

• 7-inch class long-range (LR) and long-endurance FPV drones

• Aerial photography, mapping, and cinematic cruising platforms

• Builds utilizing 2407 or 2408 size motors for efficient propulsion

Features & Advantages

• High-Efficiency Bi-Blade Design: The two-blade configuration minimizes aerodynamic drag and rotational mass, maximizing flight efficiency and significantly extending flight time for long-range and endurance-focused operations.

• Lightweight & Optimized Performance: Weighing approximately 5.52g, the design reduces power consumption while the 7-inch diameter and 4.2-inch pitch provide ample, efficient thrust for stable cruising and smooth acceleration.

• Stable & Predictable Flight Characteristics: Engineered to deliver smooth, linear control response and excellent in-flight stability, which is critical for precise navigation, filming, and long-distance flights.

• Robust Construction & Secure Mounting: Features a thick 7.5mm hub and a universal 5mm (M5) shaft hole, ensuring durability and a reliable connection for consistent power transfer to compatible 2407-2408 motors.

Company Strength
Ningbo GEMFANHOBBY Co., Ltd. (GEMFAN) is a professional drone propeller manufacturer integrating R&D, design, production, and global marketing.

Highlights:

• Expert Team: Specialists in composite materials, aerodynamics, and UAV propulsion systems.

• Innovative Technology: Holds nearly 100 independent design patents.

• Global Reach: Products are exported to over 60 countries worldwide.

• Market Leadership: FPV propellers account for approximately 60% of the global market share.

• Industry Recognition: The official propeller supplier for National Drone Racing Championship teams.

• Core Values: Professionalism · Quality · Innovation · Integrity · Service.