openscad-airfoil

Openscad Airfoil database and generator

Description

Manages a ready to use openscad airfoil database, each .scad file has its own header including the direct copy/paste code to load the airfoil.

OpenSCAD airfoil

i.e for NACA662415

//    NACA662415
include <openscad-airfoil/naca662415.scad>

af_vec_path   = airfoil_NACA662415_path ();
af_vec_slice  = airfoil_NACA662415_slice ();
af_vec_range  = airfoil_NACA662415_range ();

airfoil_NACA662415 (); // 2d object

'path' has the full path in vector of [x,y] coordinates.

'slice' is the ready to use (Spline) expanded slices in vector of [X,Yu,Yl] coordinates.

'range' is the airfoil range [Xmin,Xmax,Ymin,Ymax]

and finally the 2d object ready for anything like a linear extrapolate.

Other files

• Makefile with targets. 'all' by default computes scad file Vs the dat file. 'refresh' take the latest M. Selig database and refresh local.
• dat2scad.pl (need the Math::Spline perl library) generates a scad file from any dat file. Expand lower and upper layer to the same x coordinate.

Credits

M. Selig. https://m-selig.ae.illinois.edu/ads/coord_database.html

JC Etiemble https://tracfoil.com/airfoils/