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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.
However, there is a manual override switch that allows the engineer to run the engine with all 4,400 hp (3,300 kW) if necessary. As with the C40-9, Norfolk Southern began to upgrade their C40-9W's from 4,000 to 4,400 hp and AC traction in mid-2015, making them AC44C6M's as well. Power output: 4,000 hp (2,980 kW)
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.
But while the more common 9-44CW offers 4,400 horsepower (3,300 kW), software in the 9-40CW's engine-governing unit restricts its power output to 4,000 horsepower (3,000 kW). 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 .
GE built 106 AC6000CWs for Union Pacific, but with the older, proven 7FDL engine installed, rated for 4,400 hp (3,300 kW). These units were originally intended to be converted to the 6,250 hp (4,660 kW) 7HDL engine after some problems with the 7HDL were solved, but the conversion never occurred.
The GE 44-ton switcher is a four-axle diesel-electric locomotive built by General Electric between 1940 and 1956. It was designed for industrial and light switching duties, often replacing steam locomotives that had previously been assigned these chores.
Southern Pacific Railroad's AC-4 (meaning Articulated Consolidation) class of steam locomotives was the first class of 4-8-8-2 cab forward locomotives. They were intended to improve on the railroad's MC (Mallet-Consolidation) class 2-8-8-2 locomotives with a larger firebox, hence, the four-wheel leading truck (instead of the two-wheel).
Southern Pacific 4294 is a class "AC-12" 4-8-8-2 cab-forward–type steam locomotive that was owned and operated by the Southern Pacific Railroad (SP). It was built by the Baldwin Locomotive Works in March 1944 and was used hauling SP 's trains over the Sierra Nevada , often working on Donner Pass in California .