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11-29-2012, 11:26 PM
| | | | Skinny windmill blades
Why are windmill blades so skinny?
Wouldn't wide blades like a fan be better?
Obviously not, but why? |
11-29-2012, 11:34 PM
| | Registered User | | Join Date: May 2010 Location: Los Angeles, CA | | | The lighter they are, less wind is needed to turn them and generate power? Therefore more efficient?
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11-29-2012, 11:35 PM
|  | Registered User | | Join Date: Apr 2009 Location: Canada | |
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11-30-2012, 12:43 AM
| | Registered User | | Join Date: Jun 2008 Location: Close to Los Angeles, CA | | | Wide blades would create drag. /Thread. |
11-30-2012, 12:57 AM
| | Registered User
Endorsing Artist: Genz Benz Amplification | | Join Date: Jan 2010 Location: Nashville | | | Ever seen one of those up close? Each blade is longer than a semi trailer, and about 8 feet wide. |
11-30-2012, 01:10 AM
|  | acoustic, peavey, sunn...STACHE | | Join Date: Sep 2010 Location: Milwaukee, WI | | | 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. |
11-30-2012, 01:52 AM
| | Registered User | | Join Date: Sep 2005 Location: Istanbul | | Quote:
Originally Posted by mc_muench 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. |  
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11-30-2012, 01:56 AM
| | acoustic, peavey, sunn...STACHE | | Join Date: Sep 2010 Location: Milwaukee, WI | | | |
11-30-2012, 02:49 AM
| | Registered User | | Join Date: Dec 2010 Location: Oklahoma | | Quote:
Originally Posted by mc_muench 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. | +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. 
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11-30-2012, 09:20 AM
|  | Embedded Systems Engineer | | Join Date: Sep 2007 Location: Grass Valley, CA | | | Long, thin (high aspect ratio) airfoils are more efficient. That's why gliders have long thin wings. |
11-30-2012, 09:36 AM
|  | Registered User | | Join Date: Jun 2007 Location: Takoma Park, MD (DC) | | | It's just a fasion trend, like jeans or neckties. In the 70s we had big wide windmill blades with tie-dye colors. |
11-30-2012, 02:50 PM
| | Registered User | | Join Date: Dec 2008 Location: New Jersey | | Quote:
Originally Posted by lowfreq33 Ever seen one of those up close? Each blade is longer than a semi trailer, and about 8 feet wide. | 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
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11-30-2012, 06:28 PM
| | | Quote:
Originally Posted by megafiddle Why are windmill blades so skinny?
Wouldn't wide blades like a fan be better?
Obviously not, but why? | 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. |
11-30-2012, 06:30 PM
| | Registered User | | Join Date: Dec 2009 Location: Durham, NC | | Quote: |
Originally Posted by Jim Nazium It's just a fasion trend, like jeans or neckties. In the 70s we had big wide windmill blades with tie-dye colors. | Yes.
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