mcdonnell model 73

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    US Navy XHP (Experimental Helicopter - Patrol) competition

    In early 1950, the following companies submitted these designs to a Navy specification calling for an HP class (Patrol) helicopter with ASW (anti-submarine warfare) capability, a brand new mission for the helicopter at the time. None was selected in the end (source: Spangenberg Index, April...
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    • anti-submarine warfare bell d-104 cold war curtiss-wright p-592 gyrodyne 9 helidyne hughes 212 mcdonnell model 73 naval aviation patrol helicopter piasecki pd-22 piasecki ph-26 sikorsky xhps u.s. navy u.s. navy xhp competition united states navy
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    • Forum: Secret Postwar Aircraft Projects
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