さすがの計算の速さ！RT @hcietif : 翼の最も外側は秒速62.8mで動く……。 RT : http://bit.ly/dW4cRt 風車世界トップシェア（のはず、たぶん。）のヴェスタス社製３MW風車。12.8 rpmだから約5秒で直径100mある翼が一回転するってことかな
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さすがの計算の速さ！RT @hcietif: 翼の最も外側は秒速62.8mで動く……。 RT : http://bit.ly/dW4cRt…
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