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The angle is adjusted in radians and seems to indicate a maximum value at approximately 0.62 radians, or roughly 35.5 degrees. This translates in a maximum conversion of 38.5% of the wind force into rotational motion. Therefore, the blades should be tilted at an angle of roughly 35.5 degrees from the oncoming air stream to obtain the optimal amount of energy using flat blade windmills.  
 
The angle is adjusted in radians and seems to indicate a maximum value at approximately 0.62 radians, or roughly 35.5 degrees. This translates in a maximum conversion of 38.5% of the wind force into rotational motion. Therefore, the blades should be tilted at an angle of roughly 35.5 degrees from the oncoming air stream to obtain the optimal amount of energy using flat blade windmills.  
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= '''-- Regional Considerations --'''  =
 
= '''-- Regional Considerations --'''  =
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=== -- Tools --  ===
 
=== -- Tools --  ===
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In rural parts of the world, people are forced to be more creative with the resources available. Here are a couple examples of how this is the case:
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*The flat blades can be created by cutting a PVC pipe lengthwise, using a saw or similar device, and then heating the pipe over a fire. Once hot, it can be molded into a long, flat blade.
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*Washers can be made by hammering bottle caps to be flat and then punching a hole through the middle.
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In these circumstances, nails, rocks, fire and wood become the tools to build the wind turbine. Steel or rocks can be used as hammers and bicycle spokes can be scraped along a rock to create a flat edge and plastic bags can be melted to build a handle around one end. Furthermore, drills can be created made out of a maize-cob as a handle and an extruding nail. The nail can then be heated over an open fire until it becomes red hot and then be used to penetrate through certain materials.
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=== -- Skills and Knowledge --  ===
 
=== -- Skills and Knowledge --  ===
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Furthermore, to transmit the electricity generated to be used for applications such as operating lights, radios or charging batteries, then it is critical to have an understanding of electrical theory such as the required voltage and amperage to power the desired device.  
 
Furthermore, to transmit the electricity generated to be used for applications such as operating lights, radios or charging batteries, then it is critical to have an understanding of electrical theory such as the required voltage and amperage to power the desired device.  
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[[Image:William_Kamkwamba_Design.jpg]]<br>
      
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Beyond the initial cost, the power harnessed from the wind has an opportunity to become an income generating technology. Cellphones have provided jobs to many people who rent their phones to individuals looking to call neighboring markets to determine the price for various goods. Similarly, power can be sold to people looking to charge their cellphones or other batteries that can be used for lighting applications or to listen to radios.&nbsp;
    
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