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Very interesting! Thanks Jos.Just for the record so that it's clear for everyone: "XHJD-1" was a bona fide Navy designation — first McDonnell (D) utility (J) rotorcraft (H), first version (-1), experimental (X). The same system can be found in the Sikorsky XHJS-1 (S-53) and Piasecki XHJP-1 (HUP-1 prototype, as the letter "U" replaced "J" in the revised post-war system — similarly the letter "D", already used by Douglas, was changed to H to avoid confusion).
Very interesting! Thanks Jos.
Just for the record so that it's clear for everyone: "XHJD-1" was a bona fide Navy designation — first McDonnell (D) utility (J) rotorcraft (H), first version (-1), experimental (X). The same system can be found in the Sikorsky XHJS-1 (S-53) and Piasecki XHJP-1 (HUP-1 prototype, as the letter "U" replaced "J" in the revised post-war system — similarly the letter "D", already used by Douglas, was changed to H to avoid confusion).
