Question: The Piper Cherokee (a light, single-engine general aviation aircraft) has a wing area of 170 ft 2 and a wing span of 32 ft. Its

The Piper Cherokee (a light, single-engine general aviation aircraft) has a wing area of 170 ft² and a wing span of 32 ft. Its maximum gross weight is 24501b. The wing uses an NACA 65-415 airfoil, which has a lift slope of 0.1033 degree^–1 and a_{L = 0}= – 3°. Assume t = 0.12. If the airplane is cruising at 120mi/h at standard sea level at its maximum gross weight and is in straight-and-level flight, calculate the geometric angle of attack of the wing.

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