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    Chilton DW-1 build in NZ

    That is a very nice air racing bird. I am just curious about the Airfoil NACA used in the Chilton DW.1 (1937) It seems be used an Semi-symmetrical, something like Clark-Y or similar, once is an British airplane probably any RAF semi-symmetrical airfoil makes sense. If so, which one is used...
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