Gemfan Vortex 14x12 Glass Fiber Nylon Electric Propeller (1 pc)

The Gemfan Vortex 14x12 is a two-blade, 14-inch propeller with a 12-inch pitch for electric fixed-wing aircraft, sold as a single prop. Such a steep pitch is built for fast cruise and high top speed; it loads the motor heavily at low airspeed, so pair it with a powerful, high-torque motor on a fast airframe rather than a trainer. This is 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: 14 in
• Pitch: 12 in
• Blades: 2
• Rotation: CCW (E, standard)
• Material: Glass-fibre-reinforced nylon
• Hub diameter: 20.4 mm
• Hub thickness: 13.6 mm
• Centre hole: 6.35 mm (1/4 in)
• Adapter rings: 3, 3.17, 4, 5, 6 and 8 mm
• Weight: 40.8 g
• Colour: Grey
• Pack: 1 propeller

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. A high-pitch prop draws more current than a low-pitch one of the same diameter, so confirm the load with a wattmeter on the bench before the first flight.