Illinois Central No. 1
|Type and origin|
|Builder||Lima Locomotive Works|
|Rebuilder||Illinois Central Railroad|
|UIC classification||2′C2′ h|
|Gauge||4 ft 8 1⁄2 in (1,435 mm) standard gauge|
|Driver diameter||73 1⁄2 in (1,867 mm)|
|Weight on drivers||248,000 lb (112,000 kilograms; 112 metric tons)|
|Locomotive weight||388,000 lb (176,000 kilograms; 176 metric tons)|
|Boiler pressure||270 lbf/in2 (1.86 MPa)|
|Firegrate area||100 sq ft (9.3 m2)|
|414 sq ft (38.5 m2)|
|– Total||5,164 sq ft (479.8 m2)|
|Superheater area||2,111 sq ft (196.1 m2)|
|Cylinder size||27 in × 30 in (686 mm × 762 mm), later 24 in × 30 in (610 mm × 762 mm)|
|Tractive effort||68,288 lbf (303.8 kN), later 53,956 lbf (240.0 kN)|
|3.63, later 4.60|
|Operator(s)||Illinois Central Railroad|
|Number(s)||1, renumbered 2499 in 1945|
The Illinois Central Railroad's No. 1 was the railroad's only 4-6-4 "Hudson" type locomotive and the only 4-6-4 in North America built for freight service. It was rebuilt in the railroad's own shops from Illinois Central 7000 class 2-8-4 "Berkshire" No. 7038 in 1937 as an experiment to haul fast freight trains, which were growing too large for 4-6-2 "Pacific" types and required more speed than the road's 2-8-2 locomotives could manage.
The experiment was not successful. The locomotive proved prone to slipping, because its factor of adhesion was very low; in simple terms it was too powerful for its ability to grip the rails. John L. McIntyre, the road foreman of engines at Clinton, Illinois where the locomotive was assigned during the 1938–1939 period, made some modifications to the locomotive, including to the weight equalization across the locomotives' wheels and to reduce the cylinder diameter from 27 to 24 inches (686 to 610 mm). The latter was to reduce the starting tractive effort to a level the locomotive's grip on the rails could handle. The improvements were successful, but not to the degree that the railroad ordered any further conversions.
- Barris, Wes. "Illinois Central Hudsons". SteamLocomotive.com. Retrieved 2006-01-23.
- "Illinois Central Number 1". Illinois-Central.net. Retrieved 2006-01-23.
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