How does a propeller generate thrust?

A propeller generates thrust by converting rotational motion into forward motion through air displacement. When the blades of the propeller rotate, they push against air, which creates an area of lower pressure in front of the propeller and high pressure behind it. This pressure difference propels the aircraft forward, utilizing the principle of lift similar to the way wings generate lift.

The design of the blades helps maximize their efficiency in displacing air. As the blades rotate, they create a continuous flow that not only propels the aircraft forward but also maintains stability and control.

This method of generating thrust distinguishes a propeller-driven aircraft from jet propulsion systems, which primarily rely on expelling high-speed exhaust gases. The propellers’ function is essential for various aircraft types, particularly slower and smaller aircraft where this mechanism effectively provides the necessary thrust during flight.