Wing
In a wind tunnel we see the way air flows over the wing in streamlines. Where the flow of air is faster and the pressure is less the streamlines are closer together.
Wind tunnel tests reveal how the shape of the wing increases the speed of air flowing over the top surface.
The
wing area is important. A small pressure difference over each square metre
of wing is enough to generate a considerable force if the wing area is
large enough. Lift is geater when the surface area of the wing is large
and/or the speed of the plane is high.
The more air that flows over the wing the greater the force of lift that is generated. Answer the following questions.
Why do slow moving gliders have large wing spans?
