Gemfan Vortex 10x5 Glass Fiber Nylon Electric Propeller (2 pcs)

The Gemfan Vortex 10x5 is a two-blade propeller for electric fixed-wing aircraft: 10 inches across with a 5-inch pitch, supplied as a pair. A low pitch-to-diameter ratio puts the emphasis on static thrust and climb rather than top speed, which suits trainers, park flyers and other slower planes that run a 10-inch prop. Both props in the pack are the standard-rotation E version, listed as CCW.

Key features

• Glass-fibre-reinforced nylon: rigid, tough and resistant to bending, so the blades hold their pitch under load.
• Vortex airfoil: CFD-optimised blade profile with slim tips and a frosted leading edge that helps keep airflow attached at high RPM.
• Anti-slip hub: a textured hub surface grips the prop adapter and resists slipping in flight.
• Factory balanced: dynamically balanced for smooth, low-vibration running.
• Adapter rings included: 6.35 mm (1/4 in) centre hole plus six rings for 3, 3.17, 4, 5, 6 and 8 mm shafts and prop adapters.

Specifications

• Diameter: 10 in
• Pitch: 5 in
• Blades: 2
• Rotation: CCW (E, standard)
• Material: Glass-fibre-reinforced nylon
• Hub diameter: 20 mm
• Hub thickness: 10.1 mm
• Centre hole: 6.35 mm (1/4 in)
• Adapter rings: 3, 3.17, 4, 5, 6 and 8 mm
• Weight: 20.2 g per prop
• Colour: Grey
• Pack: 2 propellers

The E version suits a conventional front-mounted (tractor) motor; a pusher layout or the opposite motor of a counter-rotating twin needs the reverse-rotation R version. After any prop change, check current draw with a wattmeter on the bench so the motor and ESC stay within their ratings.