Chicago & Eastern Illinois 2-6-6 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 46 (Locobase 7120)

Data from C&EI 6 - 1904 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 3752-3753 in April 1892, 4017-4018 in February 1893.

Like other Chicago-area railroads of the time, the C & EI competed enthusiastically for the growing commuter traffic. And like the others, the railroad adopted an unusual wheel arrangement. Unlike the earlier 2-4-4Ts, this quartet had its firebox mounted over the last axle, with the sloping grate extending forward. They were a little smaller than the contemporaneous New York Central 2-6-6Ts (Locobase 5424), but offered as much power.

The class ran from Chicago 30 miles (48.3 km/h) to Crete, Ill, making eight stops and averaging 27 mph (43.5 km/h).

Like the NYC engines, however, the four were soon rebuilt as 2-6-0 tender engines (Locobase 7154).

Specifications by Steve Llanso of Sweat House Media
Locobase ID7120
RailroadChicago & Eastern Illinois (C&EI)
Number in Class4
Road Numbers46-49
Number Built4
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.75
Engine Wheelbase (ft)35.58
Ratio of driving wheelbase to overall engine wheebase 0.36
Overall Wheelbase (engine & tender) (ft)35.58
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)95,000
Engine Weight (lbs)171,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)171,000
Tender Water Capacity (gals)2450
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)53
Geometry Relating to Tractive Effort
Driver Diameter (in)57
Boiler Pressure (psi)150
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)17,394
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.46
Heating Ability
Firebox Area (sq ft)124.30
Grate Area (sq ft)26.20
Evaporative Heating Surface (sq ft)1547
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1547
Evaporative Heating Surface/Cylinder Volume218.86
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3930
Same as above plus superheater percentage3930
Same as above but substitute firebox area for grate area18,645
Power L14372
Power MT304.38


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