Tests of Nacelle-Propeller Combinations in Various Positions with Reference to Wings IV : Thick Wing - Various Radial-Engine Cowlings - Tandem Propellers (1935)
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ions where the ring type of +— — + - -■+ — 4-B 4-B cowling was used, with the chord line of the ring sec- Figure 4—Wing-nacelle test locations. tions set at several different angles with respect to the thrust line of the propellers. peak propulsive efficiency at values of V/nD=0.65 All the… … Figure 5.—Wing-nacelle combination mounted for test in position 4-A. 4, and it was found by testing some of them in positions the points at which peak propulsive efficiency occurred 2-A and 1-C that their order of merit was apparently in the tractor-propeller tests of references 1, 2, and 3…
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