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mcdonnell

  1. S

    XP-67 Specification S-23A?

    I'm looking for a copy of the final version of the XP-67's Specification S-23A, from July 1942. There are lots of copies of the Preliminary version dated May 1941 but I really need the final, and I've had zero luck finding it anywhere. Anyone have a copy they could share?
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