The piper cherokee (a light, single-engine general aviation aircraft) has a wing area of 15.8 m2 and a wingspan of 9.75 m. Its maximum gross weight is 10900n. The wing uses a naca 65-415 aerofoil, which has a lift slope of 0.1033 degree-1 and α l=0=-3 degree. Assume τ = 0.12. If the aeroplane is cursing at 53.64 m/s 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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