is a design tool for model aircraft builders. WinFoil is a model aircraft airfoil plotting and wing design software package. It is like a CAD program that can be used to design and print airfoil, wing ribs, and wing and tail designs. WinFoil calculates wing area, aspect ratio and mean aerodynamic chords. It also plots static stability graphs for tail area determination and Reynolds number graphs for air and water. It can import and export comma delimited files, AutoCAD DXF files, Soartech coordinate files, and Eppler format coordinate files.