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 Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 15322 |
| Railroad | Moscow, Camden & San Augustine |
| Country | USA |
| Whyte | 2-8-2 |
| Number in Class | 1 |
| Road Numbers | 1 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| 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 wheelbase | 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 / Liters/MT) | 1600 / 6056 |
| 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 / 1240 |
| 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 | |
| Tubes (number - dia) (in / mm) | 164 - 2" / 51 |
| Flues (number - dia) (in / mm) | 24 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 12.08 / 3.68 |
| Firebox Area (sq ft / m2) | 141 / 13.10 |
| Grate Area (sq ft / m2) | 25.50 / 2.37 |
| Evaporative Heating Surface (sq ft / m2) | 1576 / 146.47 |
| Superheating Surface (sq ft / m2) | 319 / 29.65 |
| Combined Heating Surface (sq ft / m2) | 1895 / 176.12 |
| Evaporative Heating Surface/Cylinder Volume | 222.91 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4590 |
| Same as above plus superheater percentage | 5370 |
| Same as above but substitute firebox area for grate area | 29,695 |
| Power L1 | 9619 |
| Power MT | 785.42 |