Assume that the propeller efficiency is 0.8, and the Oswald efficiency factor is 0.7. Calculate the zero-lift drag coefficient for the DC-3.
1. Calculate analytically the maximum rate of climb for the CJ-1 at 24,000 and compare your result with the numerical solution in Sec. 6.1 0. 2. The Douglas DC-3 (Fig. 6.80) has a maximum velocity of 229 mph at an altitude of7500 ft. Each of its two engines provides a maximum of 1200 hp. Its weight is 25,000 , aspect ratio is 9.14, and wing area is 987 ft2. Assume that the propeller efficiency is 0.8, and the Oswald efficiency factor is 0.7. Calculate the zero-lift drag coefficient for the DC-3.
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