Interpreting certain German airfoils

Discussion in 'Flight Test Data' started by s.flying, Dec 10, 2014.

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  1. s.flying

    s.flying New Member

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    Does anyone know how to interpret certain German airfoils like the ones from Heinkel, Blohm Voss and Arado?

    Here's an example

    Heinkel He 177
    Wing Root: He 1.5 36.8 17.3-0.715-36.6
    Wing Tip: He 1.5 36.8 10-0.715-36.6

    Arado Ar 234
    Wing Root: Ar 1.267 20 13-1.1-35
    Wing Tip: Ar 1.227 20 10-1.1-30
     
  2. Snautzer01

    Snautzer01 Well-Known Member

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  3. s.flying

    s.flying New Member

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    Okay, i think i figured this out.

    The Arado Ar 234 airfoil (Ar 1.267 20 13-1.1-35/Ar 1.227 20 10-1.1-30) is basically a NACA 12013 (Root) and NACA 12010 (Tip) with modifications to the first digits (theoretical optimum lift coefficient). The last four digits after the dashes are standard German modifications applied to a several dozen of NACA airfoils.

    Would like to hear your thoughts on this.
     
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