Wing for slow flying
A streamlined wing generates lift as air is forced to travel fast over its top surface.
The wing creates lift when air travels over its surface at high speeds. The plane must therefore be travelling fast in order for it to generate lift and stay in the air. Not always is it desirable for a plane to travel at high speeds, especially when it is preparing to land.
Extendable flaps are deployed during landing. As seen from the wind tunnel photographs on the right, the top surface of the wing is increased and air speeds up over the wing even more.
Extendable flaps increase the surface area of the wing. THis wind tunnell photograph shows the air forced to speed over the top.
If the flaps are pulled down too far drag results  behind the wing and slows the plane.
As the flap extends even further it creates turbulence and therefore drag behind the wing. This slows the plane down for landing.
Continue the arrows as they flow around each wing.

Which wing is appropriate for take-off and which is appropriate for landing? Explain.

When a plane lands, flaps(spoilers) quickly come up from the wing and a huge roar can be heard from inside the plane. The plane slows down using its air brakes. Explain how the flaps slow the plane. Click to see a 120Kb video.
A 120kb movie of the wind tunnell results of air flowing over a flat body
Continue with the wing