Convert rotary motion from piston engines or turboprops to provide propulsive force. They may be fixed or variable pitch. Early aircraft propellers were carved by hand from solid or laminated wood with later propellers being constructed from metal.
The most modern propeller designs use high-technology composite materials. The twisted airfoil (aerofoil) shape of modern aircraft propellers was pioneered by the Wright brothers. They found that a propeller is essentially the same as a wing and so were able to use data collated from their earlier wind tunnel experiments on wings. They also found that the relative angle of attack from the forward movement of the aircraft was different for all points along the length of the blade, thus it was necessary to introduce a twist along its length.
Their original propeller blades are only about 5% less efficient than the modern equivalent, some 100 years later. Add a map to your own listings. The item "Airplane Replica Vintage WWI Aircraft Propeller 73 Wood Model Assembled" is in sale since Friday, July 8, 2016.This item is in the category "Collectibles\Transportation\Aviation\Other Aviation Collectibles". The seller is "apexgift" and is located in NY. This item can be shipped to United States.