Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 45, p. 44. See also the Tap Line summaries at [] and Moody's Manual of Investments, American and Foreign, Part II - Eighth Year (New York: Moody's Investors Service, 1917), p. 2013. Works number was 40942 in November 1913.
Grayling Lumber Company's 1908 Michigan incorporation represented the consolidation of the Standard Tie Company and Desha Land & Timber. The new company owned over 95,000 acres of Arkansas land in Desha County, Arkansas and Union and Ouachita Parishes in Louisiana. According to Moody's, the company's assets included a Monroe, La saw mill, planing mills, dry kilns, with a capacity of 150,000 feet (double shift) per day. The Arkansas City mill had a capacity of 75,000 feet (single shift) per day.
Altogether, the M & SW had about 10 miles of 40 lb/yard (20 kg/metre) rail and featured grades as high as 6%.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 4 |
| Locobase ID | 14049 |
| Railroad | Monroe & Southwestern |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 4 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1913 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.17 / 2.80 |
| Engine Wheelbase (ft / m) | 23.75 / 7.24 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | 45.46 / 13.86 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 65,000 / 29,484 |
| Engine Weight (lbs / kg) | 90,000 / 40,823 |
| Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
| Total Engine and Tender Weight (lbs / kg) | 150,000 / 68,039 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 24" / 381x610 |
| Tractive Effort (lbs / kg) | 16,691 / 7570.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.89 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 160 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.87 / 3.62 |
| Firebox Area (sq ft / m2) | 83 / 7.71 |
| Grate Area (sq ft / m2) | 14.10 / 1.31 |
| Evaporative Heating Surface (sq ft / m2) | 1071 / 99.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1071 / 99.50 |
| Evaporative Heating Surface/Cylinder Volume | 218.13 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2256 |
| Same as above plus superheater percentage | 2256 |
| Same as above but substitute firebox area for grate area | 13,280 |
| Power L1 | 3551 |
| Power MT | 361.32 |