Moscow, Camden & San Augustine 2-8-2 "Mikado" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 15322)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 73, pp. 404+. See also George C. Werner, "MOSCOW, CAMDEN AND SAN AUGUSTINE RAILROAD," Handbook of Texas Online ([]), accessed July 21, 2013. Published by the Texas State Historical Association. Works number was 58413 in May 1925.

W T Carter & Brother's little railroad served its East Texas location for decades as the lumber company harvested timber stands all around it. (The common-carrier line ended just east of Camden, about 43 miles/69.2 km short of Saint Augustine.)

In the mid-1920s, such companies were frequently buying oil-fired, superheated logging Mikados such as the second #1 shown here. The specifications for the 6.8-mile (11-km) railway included a ruling grade of 1 1/2%, tight curves of 151 foot radii (46 metres) combined with rail elevations of 9" (229 mm). As did most of the superheated timber Mikados, the 1 used 8" (203 mm) piston valves.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID15,322
RailroadMoscow, Camden & San Augustine
Number in Class1
Road Numbers1
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.50 / 3.81
Engine Wheelbase (ft / m)27.58 / 8.41
Ratio of driving wheelbase to overall engine wheebase 0.45
Overall Wheelbase (engine & tender) (ft / m)54.04 / 16.47
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)108,000 / 48,988
Engine Weight (lbs / kg)138,000 / 62,596
Tender Loaded Weight (lbs / kg)96,000 / 43,545
Total Engine and Tender Weight (lbs / kg)234,000 / 106,141
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)1600 / 6.10
Minimum weight of rail (calculated) (lb/yd / kg/m)45 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)27,039 / 12264.70
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99
Heating Ability
Firebox Area (sq ft / m2)141 / 13.10
Grate Area (sq ft / m2)25.50 / 2.37
Evaporative Heating Surface (sq ft / m2)1576 / 146.41
Superheating Surface (sq ft / m2)319 / 29.64
Combined Heating Surface (sq ft / m2)1895 / 176.05
Evaporative Heating Surface/Cylinder Volume222.96
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4590
Same as above plus superheater percentage5370
Same as above but substitute firebox area for grate area29,695
Power L19621
Power MT785.58

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