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The AC4400CW was the first GE locomotive to offer an optional self-steering truck design, intended to increase adhesion and reduce wear on the railhead. [1] This option was specified by Canadian Pacific Railway, Cartier Railway, CSX for their units 201-599, Ferromex, Ferrosur, and Kansas City Southern Railway.
The GE Dash 9-40CW is a 4,000-horsepower (3,000 kW) diesel-electric locomotive built by GE Transportation Systems of Erie, Pennsylvania, between January 1996 and December 2004. 1,090 were built for Norfolk Southern Railway, as road numbers 8889 to 9978. 53 GE Dash 8-44CWs built to Dash 9 specifications were also built for CSX Transportation, carrying road numbers 9000 to 9052.
These traction motor replacements are part of a Norfolk Southern / General Electric project to test the economic feasibility of converting Norfolk Southern's large (125 units), but relatively old Dash 9 fleet to AC traction. (BNSF Railway is also considering a similar upgrade program for its even bigger - originally 1797 units - C44-9W fleet ...
All 125 examples of this model are owned by the Norfolk Southern Railway. The C40-9 is the only model in the Dash 9 Series to feature the standard cab design. All were built with rooftop-mounted air conditioners which gives them a rather unusual and distinctive look - and were quickly coined "top hats" by the railfan community.
The design has since proven popular with North American railroads, although some railroads, such as CSX and Canadian Pacific, preferred its AC equivalent, the AC4400CW. Because of more stringent emissions requirements that came into effect in the United States on January 1, 2005, the Dash 9-44CW has been replaced in production by the GE ES44DC.
Union Pacific, CSX, and CPKC have rebuilt several hundred AC4400CW into AC4400CWM models. The AC44C4M is a rebuild similar to the AC44C6M, but AC44C4M locomotives feature 4 traction motors and an A1A-A1A configuration rather than the AC44C6M's 6-traction motors in a C-C configuration.
The Southern Pacific Transportation Company was acquired in 1996 by the Union Pacific Corporation and merged with their Union Pacific Railroad. The Southern Pacific legacy founded hospitals in San Francisco, Tucson, and Houston. In the 1970s, it also founded a telecommunications network with a state-of-the-art microwave and fiber optic backbone.
The GE Dash 8.5-40CW was a 6-axle 4,000 hp (2,800 kW) diesel-electric locomotive rebuilt by Norfolk Southern. The first locomotive started its rebuild in 2012. Only one unit is on the active roster, and it is stored. The units will be rebuilt with the Norfolk Southern-designed wide-nose RLS cab which meets current FRA crashworthiness standards ...