Material
Propellers are commonly made from several materials with most being made from a metal alloy of some kind. Each material type has different advantages and disadvantages and some of these will be a factor in selecting the correct propeller size if your switch the type of material your prop is made from. The propeller size selector that Piranha uses take this into account when suggesting a replacement Piranha Propeller size. Common propeller construction materials are aluminum, stainless steel, bronze, Nibral (Nickel, Aluminum, Bronze alloy), and composite. Of these composites are the newest, though composites are special combinations of different materials selected in such a way as to achieve very specific mechanical properties. Most commonly used “composites” are combinations of very high tensile strength ceramic fibers bound together by a polymer resin which gives the material shape and volume and provides the toughness impact strength needed by the end product.