Litchfield & Madison 2-8-2 "Mikado" Locomotives of 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.

Specifications 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 Wheelbase15'
Engine Wheelbase33.58'
Ratio of driving wheelbase to overall engine wheebase 0.45
Overall Wheelbase (engine & tender)67.25'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers219000 lbs
Engine Weight274000 lbs
Tender Light Weight168000 lbs
Total Engine and Tender Weight442000 lbs
Tender Water Capacity9000 gals
Tender Fuel Capacity (oil/coal)14 tons
Minimum weight of rail (calculated)91 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter55"
Boiler Pressure190 psi
Cylinders (dia x stroke)25" x 30"
Tractive Effort55057 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.98
Heating Ability
Firebox Area233 sq. ft
Grate Area66.80 sq. ft
Evaporative Heating Surface3464 sq. ft
Superheating Surface902 sq. ft
Combined Heating Surface4366 sq. ft
Evaporative Heating Surface/Cylinder Volume203.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12692
Same as above plus superheater percentage15357
Same as above but substitute firebox area for grate area53567
Power L113026
Power MT524.52

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