N.A.C.A. Technical Note No. 557 Fig. 3 „ fEffective propeller thrust TV _ \B,A.5\ 6 section propeller -=-=nr-f—-r Effective propeller thrust l^Clark Y section propeller Air plus ground resistance--*. 0 … Figure 3.- Compari son of the take-off- of a pursuit plane when equipped with fixed-pitch propellers having different blade sections.
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