Product overview
The Gemfan Vortex 5.25x8E/5.25X8R electric propeller is built from glass fiber nylon for fixed-wing electric propulsion. Its 5.25 inch diameter and 8 inch pitch are paired with a 13mm hub diameter, 6mm hub thickness and 6.35mm / 0.25 inch center hole. Each propeller weighs 3.8g, while product weight including packaging is 12.68g. High-precision molds shape the nylon construction, combining high flexural modulus with enhanced material toughness. Each propeller undergoes individual precision testing and strict factory dynamic balancing.
The aerodynamic profile is developed using full-scale CFD simulation of electric propulsion operating conditions. A frosted leading edge improves efficiency at high RPM and reduces aerodynamic stall risk, while ultra-thin blade tips reduce noise and vortex loss. An anti-slip hub texture enhances grip and prevents loosening during operation. Select the propeller size according to the motor and aircraft manufacturer’s recommendations, check balance before use and securely tighten the propeller nut. Never use a damaged propeller, even when surface damage appears minor.
