APC 9x8E, 3-Blade Propeller
APC 9x8x3 Electric Propeller
APC Thin-Electric Series props offer high efficiency and great value for your electric powered models. The center hole of the prop is designed to accept a reducing bushing to fit your propeller shaft. Included with the prop are 5 bushings to fit 3mm, 4mm, 5mm, 6mm and 8mm prop shafts. Also included is a knurled plastic spacer, which keys into the front side of the prop hub, for use in pusher applications.
According to the widely accepted Maximum RPM formula of 150,000/D for APC E-Series props, the 9x8x3-E prop should not be used over 16,666 RPM.