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Skinny windmill blades

Discussion in 'Off Topic [BG]' started by megafiddle, Nov 30, 2012.

  1. megafiddle

    megafiddle

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    Why are windmill blades so skinny?

    Wouldn't wide blades like a fan be better?

    Obviously not, but why?
  2. tastybasslines

    tastybasslines I'll hump your leg Supporting Member

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    The lighter they are, less wind is needed to turn them and generate power? Therefore more efficient?
  3. Ziltoid

    Ziltoid Supporting Member

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  4. line6man

    line6man

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    Wide blades would create drag. /Thread.
  5. lowfreq33

    lowfreq33

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    Disclosures:
    Endorsing Artist: Genz Benz Amplification
    Ever seen one of those up close? Each blade is longer than a semi trailer, and about 8 feet wide.
  6. mc_muench

    mc_muench

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    Its freaky when they time them all the same and at night its hundreds of red dots, then nothing, then hundreds of red dots, then nothing, then hundreds of red dots, then nothing.
  7. machine gewehr

    machine gewehr

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    [​IMG]

    :ninja:
  8. mc_muench

    mc_muench

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  9. Topspin

    Topspin

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    +10000000000000000000000000000000000000

    Driving back from Colorado at night, I saw this. Felt like I was tripping balls for about 40 miles. I felt quite dumb when I figured out what it was. ;)
  10. MX21

    MX21 Supporting Member

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    Long, thin (high aspect ratio) airfoils are more efficient. That's why gliders have long thin wings.
  11. Jim Nazium

    Jim Nazium Supporting Member

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    It's just a fasion trend, like jeans or neckties. In the 70s we had big wide windmill blades with tie-dye colors.
  12. AnchorHoy

    AnchorHoy

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    Yes Indeedy

    There's a plant just across the river from me in Bristol PA that makes blades for these. Most definitely an Oversize Load when they're loaded up for shipment - in the neighborhood of 80' long for the trailer alone
  13. 1958Bassman

    1958Bassman

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    Wide blades would be a huge problem if the wind exceeds their ability to resist the forces. Also, the tower would have to be a lot stronger and that would raise the price to the point of being uneconomical.
  14. bolophonic

    bolophonic

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    Yes.

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