GWS Slow Fly series props offer high efficiency and great value for your electric powered models. The center hole of the prop is designed for a 3mm shaft, and can be drilled out for a 1/8" (3.17mm), 4mm or 5mm shaft.
According to the widely accepted Maximum RPM formula of 65,000/D for GWS SF series props, the 11x4.7 Slow-Fly prop should not be used over 5,910 RPM.
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