Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 65, pp. 317+. Works number was 54431 in January 1921.
Seven years after this Alabama sawmill purchased a Ten-wheeler from Baldwin (Locobase 14055), it bought this somewhat larger logging Consolidation from Eddystone. As its dimensions suggest, the 12's main role was straight freight service on the Georgia, Florida & Alabama Railroad. It still had to contend with 58 lb/yard (29 kg/metre) rail and curves as tight as 25 degrees (radii of 231 feet/70.4 metres).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 12 |
| Locobase ID | 14972 |
| Railroad | Vredenburgh Saw Mill Company |
| Country | USA |
| Whyte | 2-8-0 |
| Number in Class | 1 |
| Road Numbers | 12 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 21.67 / 6.61 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.65 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.58 / 15.72 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 121,000 / 54,885 |
| Engine Weight (lbs / kg) | 134,400 / 60,963 |
| Tender Loaded Weight (lbs / kg) | 107,700 / 48,852 |
| Total Engine and Tender Weight (lbs / kg) | 242,100 / 109,815 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 9 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 |
| Tractive Effort (lbs / kg) | 29,458 / 13361.94 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 207 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.83 / 4.22 |
| Firebox Area (sq ft / m2) | 132 / 12.26 |
| Grate Area (sq ft / m2) | 27.50 / 2.55 |
| Evaporative Heating Surface (sq ft / m2) | 1622 / 150.69 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1622 / 150.69 |
| Evaporative Heating Surface/Cylinder Volume | 205.84 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5500 |
| Same as above plus superheater percentage | 5500 |
| Same as above but substitute firebox area for grate area | 26,400 |
| Power L1 | 4827 |
| Power MT | 351.79 |