Data from Baldwin Locomotive Works Specification for Engines, 1890, as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 264. Works numbers were 18949-18950 in April 1901.
When this pair of Prairie tanks was delivered, they were much more powerful than the four that preceded them. They were assembled in the port city of Chemulpo.
Baldwin's specification spelled out the train load expectations. Seoul-Chemulpo wanted one engine to haul 10-12 25-ton rail cars up a "straight 1% grade" at an average speed of 22 mph (35 kph) when cars and track are in "good condition."
Endurance specs required the tank of "sufficient capacity for one trip over the road with some left over for overwork. Coal bunker large enough to avoid frequent replenishment."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 6 |
| Locobase ID | 12495 |
| Railroad | Seoul-Chemulpo |
| Country | Korea |
| Whyte | 2-6-2T |
| Number in Class | 2 |
| Road Numbers | 6-7 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1901 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.33 / 3.45 |
| Engine Wheelbase (ft / m) | 25.17 / 7.67 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 25.17 / 7.67 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 75,000 / 34,019 |
| Engine Weight (lbs / kg) | 105,000 / 47,627 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1500 / 5.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 15,474 / 7018.90 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.85 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 176 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 107 / 9.94 |
| Grate Area (sq ft / m2) | 18.20 / 1.69 |
| Evaporative Heating Surface (sq ft / m2) | 1067 / 99.16 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1067 / 99.16 |
| Evaporative Heating Surface/Cylinder Volume | 191.05 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2912 |
| Same as above plus superheater percentage | 2912 |
| Same as above but substitute firebox area for grate area | 17,120 |
| Power L1 | 4130 |
| Power MT | 364.20 |