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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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I think Boeing still designs the airfoil. – SMS von der Tann Mar 27 at 23:14
up vote 8 down vote accepted

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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How about the tails? Horizontal and vertical. – Gürkan Çetin Apr 2 at 5:15

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