Version 6.62 (released April 2026) is the current standard for Windows.

Select the xflr5_v6.61_win64.zip or the latest .exe from SourceForge .

XFLR5 is a powerful, free aerodynamic analysis tool primarily used for 2D airfoil and 3D wing/plane performance simulations. While it is a standard in the hobbyist and educational aerospace communities, the downloading and installation process can vary depending on your operating system.