Gemfan Vortex 7x11 Glass Fiber Nylon Fixed-Wing Propeller (2CW+2CCW)

The Gemfan Vortex 7x11 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 7x11E and two reverse-rotation 7x11R props (2 CW + 2 CCW), covering a single-motor speed plane with spares or a counter-rotating twin.

Key features

• CFD-optimised airfoil: blade profile shaped for efficient thrust at speed.

• Ultra-thin blade tips: reduce tip-vortex loss and noise.

• Frosted leading edge: finish intended for cleaner airflow at high speed.

• Anti-slip hub: grips the prop adapter so the prop stays put under load.

• Factory-tested and dynamically balanced: smooth running with less vibration passed into the airframe.

Specifications

• Diameter: 7 in (177.8 mm)

• Pitch: 11 in (279.4 mm)

• Blades: 2

• Material: Glass-fibre-reinforced nylon

• Hub diameter: 14.8 mm

• Hub thickness: 9 mm

• Centre bore: 6.35 mm (1/4 in)

• Weight: 10.1 g per propeller

• In the box: 2 × 7x11E, 2 × 7x11R, shaft adapter rings

With pitch about 1.6 times the diameter, the 7x11 is a speed prop for fast sport planes and racers rather than a slow-flying trainer prop. High-pitch props load the motor hard at launch, so confirm full-throttle current with a wattmeter against your motor and ESC ratings before flying.