$50 Water Turbine -DIY, Portable, Powerful, and Open Source
his open source turbine can be built for about half the cost of a 120 watt solar panel, and will produce about ten times the power per day. It can be plugged into any appropriate waterway without the need for earthworks, and uses only basic off the shelf and recycled materials, and basic hand tools.
The turbine is now working and producing power.
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$30 DIY Kilowatt Wind Turbine - Build Tutorial
The turbine can be made almost entirely from recycled materials with basic tools in six hours for $20-35. It is tested at 35-40% mechanically efficient, generates 130 watts mechanical in a 30 km/h wind, 1 kilowatt at 60 km/h, and can survive 100 km/h gusts.
The full step by step build tutorial can be found here:
https://opensourcelowtech.org/wind_turbine.html
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