They look like they may be more effective in residential areas too ? As a typical normal wind turbine has to be at least 10M above the roof line, to be effective against turbulance...
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Why are these not everywhere?
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They have the disadvantage that they don't generate as much electricity as the Horizontal axis turbines. On the other hand they can go a decade or more w/o failing, where the Horizontal axis turbines are lucky to last 4 to 5 years w/o repairs.
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วานนี้ 30 ธ.ค. 2560 วาร์ปไปลงบ่อออนเซ็นมาครับ ฟินมาก รู้สึกได้ถึงการผ่อนคลายของกล้ามเนื้อ ครับ
#วารีบำบัด ปล. หากไม่เกิดอุบัติเหตุที่นิ้วเท้าจะฟินสุด ๆ เลยpic.twitter.com/yhvgTLUMIsThis media may contain sensitive material. Learn more
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You've been bullshitted
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They're called Vertical Axis Wind Turbines (VAWT) and they've been around for years.
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I built my own version “on its side” but these blades are better than mine!!
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Interesting! This can even be stacked up and consume very less space!
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