APC Propellers are almost as rigid as wooden props, yet their flexibility makes them less vulnerable to damage. They have rounded tips, and are gray in color. Because they are very sharp, it is advisable to paint the tips a contrasting color (red, orange, yellow) to help avoid sticking your fingers into a spinning propeller (good advice with any prop, for that matter).
Their rigidity also gives them excellent thrust compared with other non-wood propellers.
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