Figs.7,8,9 N.A.C.A. Technical Memorandum No.47'3:- rx^' Fig.7(a)-Flow through a winciAill. (b).Course of velocity v and of pressure p of the air before and behind windmill. (Windmill is indicated by dash lines.) Fig.a … Fig.9 a, Very low-speed windmill. b, Modern medium type windmill, o, Extremely high-speed windmill.
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