Question

For NACA4313 what is the maximum camber and the position of maximum camber from the leading edge respectively is______

(a) 0.04c, 0.4c

(b) 0.4c, 0.03c

(c) 0.13c, 0.4c

(d) 0.04c, 0.03c

I had been asked this question in an internship interview.

Origin of the question is The Cambered Airfoil topic in chapter Incompressible Flow over Airfoils of Aerodynamics

Answer 1

The correct choice is (a) 0.04c, 0.4c

To explain I would say: For NACA 4 digit airfoils the first digit gives the maximum camber in 100^th parts of the chord length c and the second digit gives the position of maximum camber in 10^th parts of the chord length from the leading edge.