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Due to its quality, technology, enormous variety and reasonable price, APC propellers have been the first choice for many years both for modellers who practice the competition and for those who do not want to have complications and want to always find the propeller of the size they need without having to resort to different manufacturers and the related inconveniences.
They are made of fiberglass reinforced nylon, which gives them great torsional and flexural strength, improving their performance compared to other propellers made of inferior quality materials.
Although not shown in the picture, all APC propellers are supplied in their original bag and include plastic rings to fit the propeller as closely as possible to the motor shaft diameter, which is very important to avoid vibrations.
Security is of utmost importance and APC is one of the few manufacturers that take it into account and provides formulas to calculate the maximum RPM that we should not exceed. These formulas are not valid for propellers of other manufacturers. You can see them here.