Consider the Supermarine Spitfire shown in Figure 5.19. The first version of the Spitfire was the Mk I, which first flew in 1936. Its maximum velocity is 362 mi/h at an altitude of 18,500 ft. Its weight is 5820 lb, wing area is 242 ft2, and wing span is 36.1 ft. It is powered by a supercharged Merlin engine, which produced 1050 horsepower at 18,500 ft.

(a) Calculate the induced drag coefficient of the Spitfire at the flight condition of Vmax at 18,500 ft.

(b) What percentage of the total drag coefficient is the induced drag coefficient?

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