Gemfan Vortex 18x18 Glass Fiber Nylon Electric Propeller (1 pc)

The Gemfan Vortex 18x18 is a large, high-pitch two-blade propeller from Gemfan's Vortex Electric range, made for big electric fixed-wing UAVs and RC aircraft flying on high-power brushless motors. It is sold singly.

Key features

• Pitch equal to its 18 in diameter: a speed-oriented profile that advances a theoretical 18 in per revolution
• Glass-fibre reinforced nylon for toughness, bending resistance and dimensional stability
• CFD-optimised Vortex blade with a frosted leading edge and slim tips to cut drag, vortex losses and noise
• Precision dynamic balancing and an anti-slip hub surface for smooth, secure running
• 6.35 mm bore with six adapter rings (3, 3.17, 4, 5, 6 and 8 mm) to suit most shafts and prop adapters

Specifications

• Diameter: 18 in (457 mm)
• Pitch: 18 in
• Blades: 2
• Rotation: CW, reverse (18x18R)
• Hub diameter: 31.5 mm
• Hub thickness: 12.35 mm
• Centre bore: 6.35 mm (1/4 in)
• Weight: 87.3 g
• Colour: Grey

This is the reverse-rotation CW prop: fit it to a pusher mount or to the second motor of a twin, where opposite rotation cancels torque. A conventional nose-mounted tractor motor takes the standard-rotation (E) version. An 18x18 is a heavy load, so confirm motor and ESC current with a wattmeter before the first flight.