1. Consider an airplane patterned after the twin-engine Beechcraft Queen Air executive transport. The airplane weight is 38,220 N, wing area is 27.3 m2, aspect ratio is 7 .5, Oswald efficiency factor is 0.9, and zero-lift drag coefficient is . Calculate the thrust required to fly at a velocity of350 at (a) standard sea level and (b) an altitude of 4.5 km. 2. An airplane weighing 5000 is flying at standard sea level with a velocity of 200 milh. At this velocity the Jj D ratio is a maximum. The wing area and aspect ratio are 200 ft2 and 8.5, respectively. The Oswald efficiency factor is 0.93. Calculate the total drag on the airplane.

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