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For a broad description and more information go to the Airfoil page on Wikipedia. They come in many shapes and sizes and are usually designed for a specific purpose or application.

What is an AerofoilĪn Aerofoil (or ‘airfoil’ for North Americans) describes the cross section of a wing, rotor, rudder, propeller or other lifting surfaces. However, I will summarise the concepts and I suggest some links for you to visit if you are interested in finding out more. In this chapter, I’m not going to attempt to establish how Aerofoils work and Lift is produced in any great detail. Others, such as the rotational speed of the Rotors and hence the velocity of the air passing the aerofoil, can be adjusted and this is how we control the quadcopter as we fly it.

The Lift an aerofoil produces depends on a number of factors, some of which are beyond our control as quadcopter operators. Other forces, such as Drag, Thrust and Weight also act on the aerofoil as it moves. Aerofoils are specially designed and constructed to produce a force called Lift as they move through the air.