Consider an airplane patterned after the Fairchild Republic A-10, a twin-jet attack aircraft. The airplane has the following characteristics: wing area = 47m2, aspect ratio = 6.5, Oswald efficiency factor = 0.87, weight = 103,047N, and zero-lift drag coefficient = 0.032. The airplane is equipped with two jet engines with 40.298 N of static thrust each at sea level.
a. Calculate and plot the power-required curve at sea level.
b. Calculate the maximum velocity at sea level.
c. Calculate and plot the power-required curve at 5-km altitude.
d. Calculate the maximum velocity at 5-km altitude. (Assume the engine thrust varies directly with free-stream density.)
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