A few airfoil profiles from the extensive UIUC Airfoil Coordinates Database. The data is provided in a convenient x,y coordinate format suitable for plotting using PGF/TikZ's plot file construct.
Note that the data is released under the GNU General Public License. To use the data files with PGF/TikZ, you have to comment out the lines not containing coordinates.
Download the airfoils used in the example: airfoildata.zip

Edit and compile if you like:
% Airfoil profiles from the UIUC Airfoil Coordinates Database% http://www.ae.uiuc.edu/m-selig/ads/coord_database.html% Data is released under the GNU General Public Licence. See% http://www.ae.uiuc.edu/m-selig/pd/gpl.html for more details.\documentclass{article}\usepackage{tikz}\begin{document}\newcounter{y}\setcounter{y}{0}\begin{tikzpicture}\foreach \lbl / \fn in {EPPLER 625/e625.dat,WORTMANN FX 2/fx2.dat,EPPLER 664 (EXTENDED)/e664ex.dat,CLARK Y/clarcy.dat,Eiffel 10 (Wright)/eiffel10.dat,FX 69-PR-281/fx69pr281.dat,NACA Munk M-4 airfoil/m4.dat}{% Some profiles look better when using plot[smooth]\draw[yshift=-\arabic{y}cm,scale=3] node[left=0.5cm] {\lbl}plot file{\fn} -- cycle;\stepcounter{y}}\end{tikzpicture}\end{document}
Click to download: airfoil-profiles.tex • airfoil-profiles.pdf
Open in Overleaf: airfoil-profiles.tex