Abstract
The widely used wind turbine blade is ordinary propeller type one, which needs more complicated technique for producing its blade. To solve these difficulties, we propose a new type of wind turbine blade having the possibility of easy production of the blade as a new type of horizontal small size wind turbine. Concerning the rotation of falling maple seed in the nature world, its blade can be produced as a new type wind turbine blade, and we prevent the twisting from producing the blade with taking wind' s streamline into account. In the present study, we used larger blade than our previously investigated ones, and its electric power and rotational speed are compared by changing the conditions of installation of blade, the blade shape, and the settlement angle. It is clarified that they vary according to those conditions and that there are the optimum properties of the blade.
