Why did the Wright Brothers incorporate a twist into the design of their propeller blades?
Answer
To ensure an optimal angle of attack along the entire length of the spinning blade.
Because a rotating propeller blade moves at different speeds depending on the distance from the center—with the tip moving significantly faster than the root near the hub—a blade with a constant pitch would experience wildly inconsistent angles of attack along its length. If the blade were flat, this would lead to inefficiency, drag, and potential stalling at different sections. By adding a twist, with a steeper pitch near the hub and a flatter pitch toward the tip, the Wrights ensured that the angle of attack remained consistent and optimal relative to the oncoming air flow as the blade rotated, maximizing efficiency.
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