Vertical sectioned windmill blade, has tail blade part arranged at tail end, where blade is rotatable between two guiding plates that are attached at cross sectional ends, and is fitted in projection unit in rotatable manner

摘要

The blade has a tail blade part arranged in a perpendicular rotatable manner at a tail end between two guiding plates, where the blade is rotatable between two guiding plates that are attached at two cross sectional ends, and is fitted in projection unit in a rotatable manner around vertical axis. The blade possesses a cross section, which is formed by two identical aligned, elliptical boundary lines that lie in an overlapping manner. The cross section comprises convex- and concave longitudinal extended elliptical surfaces, which surround a cross section of a mold body.