FIELD: wind power engineering. SUBSTANCE: invention relates to blades of low power wind power generating plants. According to invention, envelope of windwheel blade, made of glass plastic and containing airfoil portion, envelope and root for fastening blade in windwheel hub, is made monolithic, airfoil portion is provided with inner space and envelope forming the space has variable thickness defined by mathematical relation. EFFECT: increased service lift, reliability and specific strength. 2 dwg
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