Gemfan Vortex 15x12 Glass Fiber Nylon Electric Propeller (1 pc)

The Gemfan Vortex 15x12 is a two-blade, 15-inch propeller with a 12-inch pitch for electric fixed-wing aircraft, sold as a single prop. The steep pitch is aimed at fast, efficient cruise on larger airframes and needs a motor with plenty of torque to turn it, so it is a poor match for slow trainers. Choose standard (E, CCW) or reverse (R, CW) rotation from the options.

Key features

• Tough construction: glass-fibre-reinforced nylon resists bending and impact while keeping the blade profile true under load.
• CFD-optimised blades: slim tips reduce tip vortices and noise, and a frosted leading edge helps limit airflow separation at high RPM.
• Secure mounting: the textured hub face grips the prop adapter so the prop does not creep under the nut.
• Dynamically balanced: balanced at the factory to keep motor vibration low.
• Fits common shafts: 6.35 mm (1/4 in) bore, with six adapter rings for 3, 3.17, 4, 5, 6 and 8 mm.

Specifications

• Diameter: 15 in
• Pitch: 12 in
• Blades: 2
• Rotation: CCW (E, standard) or CW (R, reverse)
• Material: Glass-fibre-reinforced nylon
• Hub diameter: 22 mm
• Hub thickness: 12.4 mm
• Centre hole: 6.35 mm (1/4 in)
• Adapter rings: 3, 3.17, 4, 5, 6 and 8 mm
• Weight: 46.72 g
• Colour: Grey
• Pack: 1 propeller

Pick the E (CCW) prop for a conventional front-mounted tractor motor and the R (CW) prop for a pusher layout. On a twin, fit one of each with the motors spinning in opposite directions so their torque cancels. A high-pitch prop draws more current, so confirm the load with a wattmeter on the bench before the first flight.