Gemfan Vortex 7x7 Glass Fiber Nylon Fixed-Wing Propeller (2CW+2CCW)

The Gemfan Vortex 7x7 is a two-blade electric propeller from Gemfan's Vortex fixed-wing series, made from glass-fibre-reinforced nylon. The set includes two standard-rotation 7x7E and two reverse-rotation 7x7R props (2 CW + 2 CCW), ready for a single-motor plane with spares or a counter-rotating twin.

Key features

• CFD-optimised blade profile: shaped for efficient thrust on electric power.

• Slim blade tips: reduce noise and tip vortices.

• Matte leading-edge finish: intended to keep efficiency up at high RPM.

• Textured hub: grips the prop adapter for secure mounting.

• Factory-tested with dynamic balance control: smooth running with less vibration passed into the airframe.

Specifications

• Diameter: 7 in (177.8 mm)

• Pitch: 7 in (177.8 mm)

• Blades: 2

• Material: Glass-fibre-reinforced nylon

• Hub diameter: 12.8 mm

• Hub thickness: 9 mm

• Centre bore: 6.35 mm (1/4 in)

• Weight: 9.8 g per propeller

• In the box: 2 × 7x7 CW, 2 × 7x7 CCW, shaft adapter rings

A square 7x7, with pitch equal to diameter, sits between thrust-biased and speed-biased sizes, a middle ground for sport flying. Step down to a 7x6 for more climb or up to a 7x8 for more speed, and recheck full-throttle current with a wattmeter after any prop change.