Wind energy is really another form of solar energy. Sunlight falling on oceans and continents causes air to warm and rise, which in turn generates surface winds. People have harnessed the power of the wind for thousands of years, first to carry ships across oceans and, later, to pump water and grind grain. Today, the wind is harnessed as a clean, safe source of electricity around the world.
Use the re-energy.ca construction plan to build your own wind turbine. The plan provided here will construct a vertical axis wind turbine, modelled after a design invented by the Finnish engineer S.J. Savonius in 1922. The Savonius rotor uses drag — not lift — to capture energy for making electricity. Although it isn't as efficient as a conventional horizontal axis turbine, it is much easier to build.