Naca four digit series
 @NACA_FOUR_DIGIT_DEFINITION {
 @NACA_FOUR_DIGIT_NAME {Naca4Name} {
 @NACA_FOUR_DIGIT {m, p, xx}
 @COMMENTS {CommentText}
 }
 }
Notes

The NACA four digit series defines the airfoil profile by an equation that depends on three input parameters. The numbering system for these airfoils is defined as NACA mpxx, where xx is the maximum thickness in percent chord, m is the maximum value of the mean line in hundredths of chord, and p is the chordwise position of the maximum camber in tenths of the chord. For instance, the NACA 2412 airfoil features a 12% thick airfoil and a maximum value of the camber line of 0.02, at x/c = 0.4.

It is possible to attach comments to the definition of the object; these comments have no effect on its definition.