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Bitmap Image  |  1998-11-24  |  191.3 KB  |  222x968  |  8-bit (37 colors)  |  [Data/DKPB]
   ocr: Why does a wind turbine turn? Amodern wind turbine looks like a propeller and usually has 2 or. 3 blades. If you look closely, you'll see that each blade has the same shape as an airplane wing. FASTER FLOW OVER SLOWER FLOW CURVED SURFACE OVER FLAT SURFACE FORCEONI BLADE The turbine turns when wind blows over it for the same reason that a airplane wing lifts up as it moves forward through air. One side ofa turbine blade is curved and the other is almost flat. The air that flows over the curved side has to follow a longer path to the rear edge of the blade than air flowing over the flat side. Bo ...