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The theory of contra-vanes applied to the propeller (1939)
NASA Technical Reports Server (NTRS) · leaf 23
Tigs. 4,13,22,23,24,25 f*A.C.A. Technical Memorandum No. 909 0.24 0.20 0.16 0 0.4t 0.8 ^o 0.12 Figure 22.-Maximum theoretical ef- ficiency of contra-vanes terminating at jet boundary,for different blade … 0 0*4 | 0.8 and infinite blade length. ■ Figure 25 0 Figures 23 to 25.-Maximum theoret- ical efficiency of contra-vanes of different dia- meters with 2,4 or 8 blades.NASA Technical Reports Server (NTRS)
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