savonius wind turbine - Google-haku Eräs mitoitusehdotus Savoniukselle Unfortunately, Savonius wind turbines typically only have an efficiency of around 15% - i.e. just 15% of the wind energy hitting the rotor is turned into rotational mechanical energy. (This is much less than can be achieved with a Darrieus wind turbine which uses lift rather than drag.)
Spring Blossom Tree Preschool Craft--just did this to teach them about trees. i showed them a picture of a REAL apricot tree with all of the popcorn looking blossoms, we made this popcorn tree, and then we sang popcorn popping.