SAIL-AND-SHIELD WINDMILL Russian patent published in 2002 - IPC

FIELD: wind-power engineering; high-power windmill-electric generating plants. SUBSTANCE: windmill has frame-shaped blades mounted on vertical shaft with canvas stretched over them; novelty is that shaft carries six blades rigidly fixed together on top and at bottom by means of cross-pieces; canvas is secured on frames at distance from shaft equal to one tenth of blade width; external part of frame is made in the form of solid metal strip; bottom part of frame is provided with wheel such as that used for passenger cars; two arched shields are mounted around blades, one being larger and other, smaller; shields are spaced apart through distance equal to blade width and are braced together by means of rims; upper rim of arched shields comes in contact with rim secured on two trusses via rollers; trusses are joined together and mounted on supports; wheels such as those used for passenger cars are mounted on bottom part of arched shields. EFFECT: enhanced efficiency of plant. 4 cl, 4 dwg