The theory of contra-vanes applied to the propeller (1939)
NASA Technical Reports Server (NTRS) · leaf 22
N.A.C.A. Technical Memorandum Ho. 909 ii«s. 1,2,3,5,6,7,8 … at bub. zfi & w Pig. ? -Hi Figure 3.- Normal and tangential velocity component on tbe infinitely long vanes of a 2 blade contra-vane» figures 5-8.- Best circulation distribution oh contra-vanes with 2,3,4 and 6 blades of infinite length at different hub ratios.
NASA Technical Reports Server (NTRS)
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