Well Organized Illinois Airfoil Database
The Illinois University UIUC website is an amazing resource for almost 1600 unique airfoils, but the lack of consistent formatting makes them hard to work with in a CAD or simulation program. Issues might include….
Being on a scale of 0 to 100 instead of 0 to 1
Not being in “Drela” format, where the data starts at the top trailing edge, goes to the leading edge, and finishes at the lower trailing edge in one continuous line
Inconsistently having, or not having titles or geometric data in the first few lines of the text file
Repetitive data points ( like e337: 0.1025 , 0.07317)
Two airfoils per-file (S1221: flap deployed)
In the linked file below, there are two folders. The “detailed” folder contains the thickness, thickness location, camber, and maximum camber location in the filename as a suffix to the original file name. The “undetailed” folder contains the same data, but with less cluttered file names. In both folders, the actual data in the file is always pure airfoil coordinates, so nothing can interfere with import into another program.
With the information displayed in the “detailed” folder, airfoils with similar camber and thickness values are easily found by simply using ctrl f in the file browser. The purpose of the “undetailed” file folder is to allow you to easily reference the same file you found in the other folder, without having to get the exact syntax right to locate the file for import, or even include all the information at all.
In addition to the original having been sorted by custom code, all the output data was also again checked by running every file through Xrotor to make sure it was functional, and also each file was checked to make sure the x coordinates increased and decreased only once, verifying the Drela format. Anyone who can find and error in the files below gets a free asset from the online store!
The file is linked below.