1.

Induced drag of the airfoil is _____(a) 0.0N(b) 1.2N(c) 20 N(d) 25.8KNThis question was addressed to me in semester exam.This intriguing question originated from Aerodynamic Forces in section Aerodynamics of Aircraft Design

Answer»

The CORRECT option is (a) 0.0N

The explanation is: GIVEN, an airfoil

Airfoil has infinitely long span.

Now, INDUCED drag coefficient is given by,

Cdi = S*Cl^2/π*e*B2 = S*Cl^2 / π*e*∞ = 0 N.



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