Engineering, 19.08.2021 02:00, kealalac1

The Douglas DC-3 ( Fig. 6.84 ) has a maximum velocity of 229 mi/h at an altitude of 7500 ft. Each of its two engines provides a maximum of 1200 hp. Its weight is 25,000 lb, aspect ratio is 9.14, and wing area is 987 ft 2 . Assume that the propeller effi ciency is 0.8, and the Oswald effi ciency factor is 0.7. Calculate the zero-lift drag coeffi cient for the DC-3.

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The Douglas DC-3 ( Fig. 6.84 ) has a maximum velocity of 229 mi/h at an altitude of 7500 ft. Each of...