Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 45, p. 40. See also John Moody, "New Holland, Higginsport & Mt Vernon RR", Moody's Rating Books-Railroad Investments (New York: Moody's Investor Service, 1923), p. 1763. Works numbers were 41240, 41292 in March 1914.
When this logging Prairie entered service, it operated on 30 lb/yard (15 kg/metre) rail.
When the line was sold to the Norfolk Southern in 1920, 31 went first to the Russ Lumber Co of Arcadia, Fla, then to the Nocatee Crate Company of Bradenton, Fla.
32 left for the New Holland, Higginsport & Mt Vernon Railroad headquartered in New Holland, North Carolina. It was one of two locomotives operating on the 35 miles (56.4 km) between New Holland and Wenona, NC. According to Moody's, the railroad's sole reason for being was Mattamuskeet Lake and "surrounding territory." The 32 briefly supported the NHH&MV's passenger service, but when North Carolina Farms went bankrupt, service ended and the railroad was taken into private ownership.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 31 |
| Locobase ID | 14047 |
| Railroad | John L Roper Lumber Company |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 31-32 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1914 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 22.75 / 6.93 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 44.33 / 14.05 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 57,000 / 25,855 |
| Engine Weight (lbs / kg) | 78,350 / 35,426 |
| Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
| Total Engine and Tender Weight (lbs / kg) | 138,350 / 62,642 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
| 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) | 13" x 22" / 330x559 |
| Tractive Effort (lbs / kg) | 12,929 / 5864.50 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.41 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 116 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.50 / 3.51 |
| Firebox Area (sq ft / m2) | 74 / 6.87 |
| Grate Area (sq ft / m2) | 13.30 / 1.24 |
| Evaporative Heating Surface (sq ft / m2) | 767 / 71.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 767 / 71.26 |
| Evaporative Heating Surface/Cylinder Volume | 226.92 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2394 |
| Same as above plus superheater percentage | 2394 |
| Same as above but substitute firebox area for grate area | 13,320 |
| Power L1 | 4440 |
| Power MT | 515.18 |