naca

naca, a MATLAB code which takes the parameters of certain NACA airfoils and return the coordinates of a sequence of points that outline the wing shape.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

naca is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

naca_test

bird_egg, a MATLAB code which evaluates some formulas for the shapes of bird eggs.

joukowsky_transform, a MATLAB code which applies the Joukowsky transform to data, mapping between a circle in the complex plane and various airfoil shapes.

Reference:

1. Eastman Jacobs, Kenneth Ward, Robert Pinkerton,
   "The characteristics of 78 related airfoil sections from tests in the variable-density wind tunnel",
   NACA Report 460, 1933.

Source Code:

• naca4_mpt.m, extracts the M, P and T parameters from a NACA 4 digit code.
• naca4_cambered.m, given a point xc along the camber line, returns pairs (xu,yu) and (xl,yl) along the upper and lower airfoil surface of a NACA cambered 4-digit airfoil.
• naca4_symmetric.m, given a point x, returns the value y(x) so that (x,y(x)) lies on the upper surface of a NACA symmetric 4-digit airfoil and (x,-y(x)) lies on the lower surface.
• r8mat_write.m, writes an R8MAT to a file.