| The
            
            Northrop N-23 Pioneer was designed as a short take off and
            landing (STOL) transport and first flew in
            1946.  Due to the large number of war surplus aircraft, the
            Pioneer did not sell.
             In 1948, Northrop received a contract to build 23
            aircraft based on the N-23 for the U.S. Air  |  | Force.  Designated
            the YC-125 Raider, the  aircraft was found to be underpowered
            for its intended missions--transport to forward combat areas and
            Arctic rescue.  It was also determined that helicopters were
            better suited for these missions.  The existing YC-125s were
            declared surplus in 1955. |