Question

Following diagram represents _____________

(a) typical drag polar

(b) drag polar for non-symmetric wing

(c) wing lift curve

(d) thrust required for wing

This question was addressed to me in an interview.

I'd like to ask this question from Aerodynamic Coefficients in chapter Aerodynamics of Aircraft Design

Answer 1

Right option is (a) typical drag polar

Easy explanation: The above diagram is illustrating a typical schematic diagram of airfoil drag polar. Drag polar is nothing but a graph which shows variation of drag coefficient with respect to lift coefficient. Wing lift curve is used to show lift variation.