Diesel Locomotives, 1940-1969
The earliest diesel-era photo in my collection is this photo
of Wisconsin Central F3 A-B-A set 2200 at the Electro-Motive plant in LaGrange,
Illinois in 1948. This is actually the EMD builder's photo of the 2200.
The 2200 would later be nicknamed the "Queen Mary" by crews, no
doubt a reference to the immense length of the units as compared to even
the longest steam locomotives, the 5000-series O-20 class 4-8-4s. The 2200
operated for some time as a coupled A-B-A set, but eventually the units
were separated and used independently across the system, at which time they
acquired A, B and C subletters. (C was assigned to the B unit, for reasons
beyond explanation here).