Bicycle wheel wind turbine（自転車の車輪そのままの風力発電機）

From: mamawachibi2

Added: 16 years ago · 0:35 · 480p

It is low cost and very easy. The velocity of the wind is 3-4m/s. Occasional 5m/s. 安くて超簡単。 風速は３～４ｍ／ｓ、 ...