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Written in Fortran
Website /xfoil/web/Public/

XFOIL is an interactive program for the design and analysis of subsonic isolated airfoils. Given the coordinates specifying the shape of a 2D airfoil, Reynolds and Mach numbers, XFOIL can calculate the pressure distribution on the airfoil and hence lift and drag characteristics. The program also allows inverse design - it will vary an airfoil shape to achieve the desired parameters. It is released under the GNU GPL.


  • History 1
  • Similar Programs 2
  • References 3
  • External links 4


XFOIL was first developed by Mark Drela at MIT as a design tool for the MIT Daedalus project in the 1980s.[1] It was further developed in collaboration with Harold Youngren. The current version is 6.99, released in December 2013. Despite its vintage, it is still widely used.[2]

XFOIL is written in FORTRAN.

Similar Programs

  • XFOIL was translated to the C++ language and integrated in the program XFLR5, principally for use on model aircraft design.
  • An unrelated program called JavaFoil may be used for similar analysis. It is written in Java.
  • Vortexje is an independent panel method implementation in 3D.
  • QBlade is for wind turbine blade design


  1. ^
  2. ^

External links

  • The XFOIL home page
  • XFLR5
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