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Experimental investigation of the effect of an oscillating airstream (Katzmayr effect) on the characteristics of airfoils (1924)
NASA Technical Reports Server (NTRS) · leaf 35
Fig.2, (cent.) N.A.CA. Technical Note No.202 Assembly details of movable deflectors or blades.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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