Consider an airplane patterned after the Fairchild Republic A-10, a twin-jet attack aircraft. The airplane has the following characteristics: wing area =47 m^2, aspect ratio = 6.5, Oswald efficiency factor =0.87, weight =103,047 n, 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.)