Explanation Text

How Planes Fly

A plane needs air pressure under their wings to stay up in the air. As they move forward, the higher air pressure underneath their wings pushes them upward and gives them lift.
The smooth, streamlined shaped of the plane allows air to flow easily over its surface. This help to reduce the drag caused by the air pushing against the plane and allows it to move rapidly through the air.
Planes move forward using engines. This movement is called thrust. Moving forward keeps a stream of moving air passing over the wings, which allows the plane to stay up int the air. If the engines fail, the planes will begin to descend very quickly.
The air above the wing moves faster so it is a lower pressure than the air under the wing.
The air under the wing moves more slowly and is slightly squashed so it is at a higher pressure than the air above the wing.

Ardian Setianto
XII IA 11/ 05