Full-Scale Wind-Tunnel Tests of a Propeller with the Diameter Changed by Cutting off the Blade Tips (1931)
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4 REPORT NATIONAL ADVISORY COMMITEEE FOR AERONAUTICS This propulsive efficiency includes the increase in velocity and density, that is, the same drag of all parts of the airplane (in this case the fuse- dynamic pressure q. lage) affected by the slipstream, and also the effect of the body… … Fuselage mounted for tests Figure 1 RESULTS (1) Then R= T—D — AD The observed data are given in Table I with the To obtain the propulsive efficiency, which includes any propeller-body interference, an effective thrust is standard nondimensional coefficients computed from used which is defined as…
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