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Airplanes, also known as aeroplanes, are machines designed to transport persons or propoerty from one point to another. Airplanes come in many different shapes and sizes. Throughout each type, however, they all rely on the same aerodynamic principals. Specifically, the airfoil. The airfoil is the key to moving air. It is most commonly known as a wing, but airfoils are placed all around the aircraft. Propeller blades, helicopter rotors, jet engine turbines, and more all use the airfoil shape to move air. Select a category to learn more.
