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NACA airfoils are not used anymore except on some aircraft. So which type of airfoil does the 737 use? Which company designs it and builds it?

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    $\begingroup$ I think Boeing still designs the airfoil. $\endgroup$ – SMS von der Tann Mar 27 '16 at 23:14
  • $\begingroup$ Boeing designs and builds them. Why would a large aircraft company not design and build something so fundamental to its planes? $\endgroup$ – David Richerby Aug 14 at 9:55
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Boeing designs its own airfoils for its aricraft. According to this site, the following airfoils are used in 737:

Boeing 737-100: Wing root- BAC 449/450/451; Wing tip- BAC 442

Boeing 737-200: Wing root- BAC 449/450/451; Wing tip- BAC 442

Boeing 737-300: Wing root- BAC 449/450/451; Wing tip- BAC 442 mod

Boeing 737-400: Wing root- BAC 449/450/451; Wing tip- BAC 442 mod

Boeing 737-500: Wing root- BAC 449/450/451; Wing tip- BAC 442 mod

The 737 wings are manufactured at the Boeing plant in Renton, Washington.

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  • $\begingroup$ How about the tails? Horizontal and vertical. $\endgroup$ – Gürkan Çetin Apr 2 '16 at 5:15
  • $\begingroup$ Tail sections usually use symmetrical profiles such as the NACA0009 and (slightly thicker) NACA0012. Although the exact airfoil is not specified, this answer confirms those thickness ratios for the Boeing 737-100 as well. $\endgroup$ – Bram Aug 14 at 8:19
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From this site, contains links to the profiles which can be used for Xfoil. enter image description here

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