How does a propeller generate thrust?

A propeller generates thrust through the principle of differential air pressure. As the propeller blades rotate, they are designed in such a way that the airflow above the blades is accelerated, resulting in a decrease in pressure, while the airflow beneath the blades is comparatively slower, maintaining a higher pressure. This difference in pressure creates lift, which translates into thrust that propels the aircraft forward.

The relationship between the high-pressure and low-pressure zones is crucial, as it is this imbalance that generates the necessary force to overcome drag and achieve forward motion. The more efficiently the blades can manipulate air pressure, the more thrust is produced.

This concept is fundamental in aerodynamics and is essential for the effective operation of both fixed-wing aircraft and multirotors, as it allows for controlled movement in the air. Understanding this mechanism is vital for anyone involved in the operation or design of unmanned aerial systems (UAS) and for ensuring their safe and effective functioning.