The NACA LS (1) – 04XX airfoils when compared to NACA airfoils with same thickness had higher L/D ratios. For a lift coefficient of 1.0, what was this increase approximately in percentage?(a) 80%(b) 20%(c) 50%(d) Less than 10%This question was posed to me in unit test.I need to ask this question from Modern Low Speed Airfoils in portion Incompressible Flow over Airfoils of Aerodynamics

The NACA LS (1) – 04XX airfoils when compared to NACA airfoils with

1.	The NACA LS (1) – 04XX airfoils when compared to NACA airfoils with same thickness had higher L/D ratios. For a lift coefficient of 1.0, what was this increase approximately in percentage?(a) 80%(b) 20%(c) 50%(d) Less than 10%This question was posed to me in unit test.I need to ask this question from Modern Low Speed Airfoils in portion Incompressible Flow over Airfoils of Aerodynamics
Answer» The correct answer is (C) 50% For explanation: The LIFT COEFFICIENT of 1 is VITAL for the aviation sector. The new low-speed airfoils developed had higher L/D ratios. For a lift coefficient equal to 1, the increase was about 50%.

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