GE AC4400CW

GE AC4400CW
A conductor rides on a pair of CSX AC4400CW locomotives in Worcester, Massachusetts.
Type and origin Power type Diesel-electric Builder GE Transportation Systems Model AC4400CW Build date 1993–2004 Total produced 2,834
Specifications Configuration: ​  • AAR C-C  • UIC Co'Co' Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Wheel diameter 42 in (1,067 mm) Wheelbase 13 ft 2 in (4.01 m) Length 73 ft 2 in (22.30 m) Height 15 ft 6 in (4.72 m) Loco weight 426,000 lb (193,000 kg) Fuel capacity 5,000 US gal (19,000 L; 4,200 imp gal) Traction motors 6
Performance figures Power output 4,400 hp (3,300 kW) Tractive effort 180,000 lbf (800 kN) Starting 145,000 lbf (640 kN) at 13.7 mph (22.0 km/h)
Career Operators Various, see table Locale North America

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.

2,834 units were built for North American railroads over an 11-year production. In 2005, all Class I freight railroads except Norfolk Southern and Canadian National owned at least one AC4400CW. Norfolk Southern ordered the very similar C40-9Ws, although NS would later acquire 36 former CEFX AC4400CWs in August 2023. As a result of more stringent emissions requirements that came into effect on January of that year, GE no longer offers the AC4400CW, replacing it with the ES44AC.