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What is the thickness in NACA 2412 airfoil?

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in Aerodynamics by (773k points)
What is the thickness in NACA 2412 airfoil?

(a) 12%

(b) 24%

(c) 41%

(d) 2%

I had been asked this question in exam.

The origin of the question is Airfoil Nomenclature topic in section Incompressible Flow over Airfoils of Aerodynamics

1 Answer

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Best answer
Right choice is (a) 12%

Explanation: The NACA 2412 airfoil has a maximum camber of 2% located at 40% from the leading edge with a maximum thickness of 12%. It was the first 4-digit NACA series and it was developed in 1930’s because of the 12% thickness the shape of the airfoil is symmetric.

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