Litchfield & Madison 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 157 (Locobase 6289)

Data from builder's specs published on [] (4 August 2004). Firebox heating surface included 27 sq ft of arch tubes.

The website for the Chicago & North Western Railway Historical Society -- -- says that the L & M measured about 68 miles in length and ran from Benld to Madison near St Louis. The shops and offices were at Edwardsville, Illinois. It moved coal, products from Madison, and bridged the C & NW traffic.

As can be seen from the specs, these Mikes were not meant for high-speed service and probably constituted the bulk of modern power on the line; in fact they had the smallest drivers of any US Mikado on a standard-gauge, common-carrier line. After the first three were delivered in 1923, two more (160-161) followed in 1931 to the exact same specs other than slightly higher weights.Of the class, the leader -- 157 -- was the last to be retired.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID6289
RailroadLitchfield & Madison
Number in Class5
Road Numbers157-161
Number Built5
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.57
Engine Wheelbase (ft / m)33.58 / 10.24
Ratio of driving wheelbase to overall engine wheebase 0.45
Overall Wheelbase (engine & tender) (ft / m)67.25 / 20.50
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)219,000 / 99,337
Engine Weight (lbs / kg)274,000 / 124,284
Tender Loaded Weight (lbs / kg)168,000 / 76,204
Total Engine and Tender Weight (lbs / kg)442,000 / 200,488
Tender Water Capacity (gals / ML)9000 / 34.09
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)14 / 12.70
Minimum weight of rail (calculated) (lb/yd / kg/m)91 / 45.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55 / 1397
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)25" x 30" / 635x762
Tractive Effort (lbs / kg)55,057 / 24973.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98
Heating Ability
Firebox Area (sq ft / m2)233 / 21.65
Grate Area (sq ft / m2)66.80 / 6.21
Evaporative Heating Surface (sq ft / m2)3464 / 321.93
Superheating Surface (sq ft / m2)902 / 83.83
Combined Heating Surface (sq ft / m2)4366 / 405.76
Evaporative Heating Surface/Cylinder Volume203.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12,692
Same as above plus superheater percentage15,357
Same as above but substitute firebox area for grate area53,567
Power L113,026
Power MT524.52

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Wes Barris