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00912_Field_912.txt
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1997-05-26
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901b
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41 lines
Background Information
As an airplane moves
through the air, the wing of
the plane redirects the air
so that some of the air
flows over the top of the
wing, and some flows
beneath the wing. The
moving air exerts pressure,
or pushes on the two sides
of the wing. Faster air
exerts less pressure than
slower air.
The shape of the wing
affects how quickly the air
moves over and under the
wing. Normally airplane
wings are shaped so that
the air moving over the top
of the wing moves faster
than the air moving below
the wing. Because the air
pressure than the air on top
of the wing, the air pushes
up on the underside of the
wing with greater force
than it pushes down on the
top side. This creates an
upward push on the wing
that causes the wing to lift.
Changing the angle of the
wing, changes the speed of
the air moving over and
under the wing.