Viscous (or inviscid) analysis of an existing airfoil, allowing forced or free transition transitional separation bubbles limited trailing edge separation lift and drag predictions just beyond CLmax Karman-Tsien compressibility correction fixed or varying Reynolds and/or Mach numbers Airfoil design and redesign by interactive modification of surface speed distributions, in two methods: Full-Inverse method, based on a complex-mapping formulation Mixed-Inverse method, an extension of XFOIL's basic panel method Airfoil redesign by interactive modification of geometric parameters such as max thickness and camber, highpoint position LE radius, TE thickness camber line via geometry specification camber line via loading change specification flap deflection explicit contour geometry (via screen cursor) Blending of airfoils Writing and reading of airfoil coordinates and polar save files Plotting of geometry, pressure distributions, and multiple polars
Release Conditions XFOIL is released under the GNU General Public License. By downloading the software you agree to abide by the GPL conditions. The most important conditions are: You may copy, modify and redistribute XFOIL or its modifications freely. Any such redistributions must be done under the terms of the GPL, else the permission is withdrawn.AnnouncementsAn Xfoil electronic bulletin board has been created at YahooGroups. The intent is to exchange information on Xfoil and other aero software.
A Norwegian translation of this webpage has been createdby NTNU studentsSoftwarexfoil6.97.tar.gz (3972497 bytes) Xfoil 6.97 for Unix and Win32.Xfoil for Mac-OSX An independent 3rd-party build.Also at xfoil6.99.tgz (4515991 bytes) Xfoil 6.99 for Unix and Win32. Gzipped directory tar image. All source code, Orr-Sommerfeld database, plain text version of User Guide, sample Xfoil session inputs. Requires Fortran 77, C compilers, windowing support. XFOIL6.99.zip (3813300 bytes) Xfoil 6.99 for Windows.xfoilP3.zip (508267 bytes) Xfoil 6.94 executable for Win32, optimized for Pentium 3. xfoilP4.zip (531947 bytes) Xfoil 6.94 executable for Win32, optimized for Pentium 4. Pplot.zip (289812 bytes) Pplot executable for Win32 (optional separate polar save-file plotter). Pxplot.zip (281493 bytes) Pxplot executable for Win32 (optional separate polar dump-file plotter).
Note: The source code for Xfoil itself is the same for Unix and Win32. The plot library directory (plotlib) has a separate win32 subdirectory. See all the README files for more info. Win32 Notes: Interaction with Win32 XFOIL is through a DOS-type text console window. Some of Microsoft's Win32 OS'es (Win95/98/ME) have limitations on # of lines in a console window and cannot fully display XFOIL menus or output. Win95/98/ME also have other shortcomings with regard to resource usage and stability although XFOIL runs under these OS'es.Windows NT, Win2000 and Windows XP are the recommended Win32 platforms. Win32 Exe Notes: The executables for Win32 were compiled using the Intel Fortran Compiler 5.01-15 and Visual C++6.0. The Intel compiler (thanks to Tom Clarkson at Intel) was used to optimize executables for P3 and P4 Pentium architectures. The XFOIL executables should run on any Win32 Pentium-class machine as compiler options were used to include both optimized code and generic Pentium or AMD processor code for portability. Documentsxfoil_doc.txt (78602 bytes). User Guide in plain text.dataflow.pdf (11261 bytes). Data flow diagram.sessions.txt Sample Xfoil session inputs. version_notes.txt Summary of changes made for recent Xfoil versions.
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If you work for academic, government, or non-profit institutions you may download and use this software for free. We only ask that you acknowledge the use of these programs in your published papers, talks, and reports. We also ask that you reference the key scientific publications where the algorithms behind the programs are described. 2ff7e9595c
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