Wings were previously referred to as main planes. They produce the lift that supports the aircraft
in flight. When air flows over the top surface of a wing from the leading edge, Le, to the trailing
edge, Te, the distance that it has to travel is increased by the camber, or curve of the surface,
compared to the distance that it would have to travel when passing under the wing, as shown in
diagram 3.1. The air flowing over the cambered surface increases its velocity, which results in a
decrease in the static pressure above the wing. The amount of lift produced is dependent on the
speed of the air over the wing, the camber, and the surface area of the wing.