Chicago & Illinois Midland 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 12510)

Data from "Equipment and Supplies - Locomotive Building," Railway Age Gazette, Vol 48, #4 (28 January 1910), p 214. Works number 47769 in April 1910.

In the same year that wide-firebox Consolidations were logged in Alco's order book for the Buffalo & Susquehanna as their 169-178, the line went into receivership. The engines were redirected to several lines and #174 wound up on the C & IM.

In 1938, it moved over to the Midland Terminal and was renumbered 61. 61 served the MT until the road was closed in 1949.

Class C-1 (Locobase 7652)

Data from C&IM 4 -1954 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This single Consolidation was originally ordered by the Buffalo & Susquehanna in 1910 #174 as their , but that railroad couldn't pay for it. So the C & IM bought it in October 1911. The design sported 12" (305 mm) piston valves and the firebox heating surface included 26 sq ft of arch tubes.

The C & IM had been established only five years earlier as a joint venture between Chicago Edison and Commonwealth Electric (both controlled by utilities magnate Samuel Insull) and the Peabody Coal Company.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12510 7652
RailroadChicago & Illinois MidlandChicago & Illinois Midland
Number in Class11
Road Numbers10 / 510510
Number Built11
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase14.25'14.25'
Engine Wheelbase22.08'22.08'
Ratio of driving wheelbase to overall engine wheebase 0.65 0.65
Overall Wheelbase (engine & tender)54.20'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers167000 lbs170520 lbs
Engine Weight185000 lbs194280 lbs
Tender Light Weight125740 lbs
Total Engine and Tender Weight320020 lbs
Tender Water Capacity6000 gals6200 gals
Tender Fuel Capacity (oil/coal)12 tons12 tons
Minimum weight of rail (calculated)70 lb/yard71 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter51"51"
Boiler Pressure200 psi190 psi
Cylinders (dia x stroke)21" x 28"21" x 28"
Tractive Effort41160 lbs39102 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06 4.36
Heating Ability
Firebox Area179 sq. ft205 sq. ft
Grate Area54.40 sq. ft54.29 sq. ft
Evaporative Heating Surface2676 sq. ft2095 sq. ft
Superheating Surface450 sq. ft
Combined Heating Surface2676 sq. ft2545 sq. ft
Evaporative Heating Surface/Cylinder Volume238.40186.64
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1088010315
Same as above plus superheater percentage1088012172
Same as above but substitute firebox area for grate area3580045961
Power L1540810316
Power MT285.57533.49


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