What is an airfoil? State some examples. (FAA‑H‑8083‑25)
An airfoil is a device which gets a useful reaction from air moving over its surface, namely LIFT. Wings, horizontal tail surfaces, vertical tail surfaces, and propellers are examples of airfoils.
An airfoil is a surface designed to create lift when it moves through the air by deflecting the airflow around it. It is used to provide lift to an aircraft to keep it flying. The principle behind the airfoil is based on Bernoulli’s law, which states that as a fluid’s speed increases, its pressure decreases.
Examples of airfoils include wings, helicopter rotors, propeller blades, and turbine blades. Wings are the most common example of airfoils used in aviation. They are designed to create lift and support the weight of the aircraft during flight. Helicopter rotors work on the same principle as wings but they rotate to produce both lift and propulsion. Propeller blades are airfoils that are used to propel airplanes forward by creating thrust. Turbine blades work in a similar way as propeller blades, but they convert the energy of flowing air or gas into mechanical energy to power an engine or generator.
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