The incorrect statement for a finite wing with elliptical lift distribution out of the following is_____(a) Induced drag coefficient ∝ coefficient of lift(b) Induced drag coefficient increases rapidly with lift(c) Induced drag coefficient is around 25%(d) To reduce induced drag, we want wing with the lowest aspect ratioI had been asked this question during a job interview.Question is taken from Prandtl’s Classical Lifting-Line Theory in section Flow over Airfoils over Finite Wing of Aerodynamics

The incorrect statement for a finite wing with elliptical lift distrib

1.	The incorrect statement for a finite wing with elliptical lift distribution out of the following is_____(a) Induced drag coefficient ∝ coefficient of lift(b) Induced drag coefficient increases rapidly with lift(c) Induced drag coefficient is around 25%(d) To reduce induced drag, we want wing with the lowest aspect ratioI had been asked this question during a job interview.Question is taken from Prandtl’s Classical Lifting-Line Theory in section Flow over Airfoils over Finite Wing of Aerodynamics
Answer» Right answer is (d) To REDUCE induced drag, we want wing with the lowest aspect RATIO The EXPLANATION is: The induced drag coefficient VARIES directly with the square of lift coefficient. Thus, it increases rapidly with the lift. At high speeds, it is around 52% of total drag. For least induced drag, we want high aspect ratio for the wing.

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