AEROHYDRODYNAMIC WINDMILL Russian patent published in 1995 - IPC

FIELD: wind-electric power engineering; vertical-shaft wind-electric power plants. SUBSTANCE: windmill is multitier structure with at least three vertical blades in each tier hinged on shafts. Each blade is of aerodynamic airfoil statically balanced-out relative to center of axis of revolution offset towards front edge of blade. Blade shafts in each tier are displaced in respect to those of adjacent tiers. Stops engageable with blades are offcentered from axes of revolution of respective blades to windmill shaft by distance smaller than that from front edge to center of blade revolution along airfoil chord. EFFECT: improved design. 7 dwg