Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 53. See also Locobase 7310 for a note on the use of convict labor on the TCI system. Works number was 38403 in September 1912.
Although derived from the same low-drivered Prairie design sold to the St Louis Water Works in 1910 (Locobase 13692), the 12 had a bigger grate. Its heating proportions retained the weird imbalance between a small firebox and grate and the much larger boiler.
Later worked for TCI (Tennessee Coal, Iron & Railroad) and was still on the road in 1942.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 12 |
| Locobase ID | 13901 |
| Railroad | Central Iron & Coal Company |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 12 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1912 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 24.75 / 7.54 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.40 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.37 / 14.74 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 98,000 / 44,452 |
| Engine Weight (lbs / kg) | 134,000 / 60,781 |
| Tender Loaded Weight (lbs / kg) | 70,000 / 31,752 |
| Total Engine and Tender Weight (lbs / kg) | 204,000 / 92,533 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| 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) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 24,118 / 10939.75 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.06 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 310 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.08 / 4.29 |
| Firebox Area (sq ft / m2) | 106 / 9.85 |
| Grate Area (sq ft / m2) | 23.30 / 2.16 |
| Evaporative Heating Surface (sq ft / m2) | 2378 / 220.92 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2378 / 220.92 |
| Evaporative Heating Surface/Cylinder Volume | 376.86 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4194 |
| Same as above plus superheater percentage | 4194 |
| Same as above but substitute firebox area for grate area | 19,080 |
| Power L1 | 6083 |
| Power MT | 410.53 |