Lake Champlain & Moriah 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 16 (Locobase 11766)

Data from "Recent Baldwin Locomotives," Railway Age, Vol 41 (8 June 1906), pp.930-931 and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volumes 29, p. 52 and 30, p. 226. Works numbers were 27900 in April 1906 and 30905 in May 1907.

The RA report described the stiff requirements demanded by the LC & M. (See Locobase 11765 for a brief description of this upstate New York railroad.): 250 tons up a 4% grade and around 14-degree curves - without rack adhesion! Frictional resistance was to be no more than 15 lb per ton.

An unusual suspension feature was the use of coiled springs to transfer the weight borne by the equalizing beam working the rear driven axle and the rear truck to the engine frame. Another odd arrangement was the placing of the crosshead on the same plane as the center line of the steam chest, thus moving the combination lever inside the crosshead guides. Note that at this time, the engines still used balanced slide valves rather than piston valves.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11766
RailroadLake Champlain & Moriah
Number in Class2
Road Numbers16-17
Number Built2
BuilderBurnham, Williams & Co
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 4.42
Engine Wheelbase (ft / m)29 / 8.84
Ratio of driving wheelbase to overall engine wheebase 0.50
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)170,230 / 77,215
Engine Weight (lbs / kg)204,730 / 92,864
Tender Loaded Weight (lbs / kg)110,270 / 50,018
Total Engine and Tender Weight (lbs / kg)315,000 / 142,882
Tender Water Capacity (gals / ML)5500 / 20.83
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)71 / 35.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)22" x 28" / 559x711
Tractive Effort (lbs / kg)46,077 / 20900.20
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.69
Heating Ability
Firebox Area (sq ft / m2)182.30 / 16.94
Grate Area (sq ft / m2)57 / 5.30
Evaporative Heating Surface (sq ft / m2)3300 / 306.69
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)3300 / 306.69
Evaporative Heating Surface/Cylinder Volume267.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,400
Same as above plus superheater percentage11,400
Same as above but substitute firebox area for grate area36,460
Power L15698
Power MT295.18

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Wes Barris