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The GE AC4400CW, , sometimes referred as "AC44CW", is a 4,400 horsepower (3,300 kW) diesel-electric locomotive that was built by GE Transportation Systems between 1993 and 2004. It is similar to the Dash 9-44CW , but uses AC traction motors instead of DC, with a separate inverter per motor.
They were built under the same premise that a lower power rating than the 4,400 hp (3,300 kW) rating of the Dash 9-44CW (or C44-9W) (see below) would prolong the life of the engine, and use less fuel. 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.
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 .
The GE AC44C6M is an AC-traction 4,400-horsepower (3,300 kW) diesel locomotive, rebuilt from GE Transportation Dash 9 locomotives. AC44C6M rebuilds have been done by GE (now Wabtec), American Motive Power, Inc., and Norfolk Southern Railway's Juniata and Roanoke Shops, starting in September 2015.
The Evolution Series locomotives are visually similar to the AC4400CW and GE Dash 9 Series, although small differences are evident. The most noticeable difference is the radiator section at the rear of the locomotive is larger to accommodate the GEVO's air-to-air intercoolers.
The GE Dash 9-40C, also called a C40-9, was a 4,000-horsepower (3,000 kW) diesel locomotive that was built by GE Transportation Systems of Erie, Pennsylvania, between January 1995 and March 1995.
[10] Union Pacific: Standard 7500-7509 10 November 1995-December 1996 The first ten units were originally numbered 7000-7009. 7000 was the first AC6000CW ever built. All were converted to AC4460CW units and renumbered to 6888-6968. They were classified as C44ACCCA. In 2023, all were rebuilt to C44ACM. 7510-7554 45 July-December 1998 7555-7579 25
The program consisted of 10 C40-8Ws from CSX, #'s 7771, 7774, 7799, 7801, 7807, 7811, 7786, 7787, 7779 & 7780, the units were rebuilt with updated prime movers, new cab interiors, new control system (upgrade to CCA from IFC), installation of PTC equipment, fresh repaint, body work as needed, addition of shutters to the radiator to help more ...