FreeCAD ImportAirfoil Macro - Drawing Airfoil Geometry in an Open-Source CAD Program

Abstract

Macro programs used in computer modeling programs have become extremely important due to the high complexity of the models as well as the opportunity to create or adapt a specific geometry as soon as possible. Due to the implementation of the Python programming language, the FreeCAD program is highly suitable for creating advanced macros. When modeling aircraft parts (wings and tail surfaces), wind turbine blades, and similar structures, the biggest problem, due to the shape of the outer contour, is drawing the cross-section of the structures. The ImportAirfoil program allows to quickly and easily import and draw the contour of the desired airfoil, as well as modify it. This paper shows the complete procedure for importing and drawing of NACA2410 airfoil.