Data from "Sentetsu Puresa-class locomotives" in Wikipedia at [], last accessed 10 July 2022. Works numbers were 8206-8219 in December 1911.
Wikipedia explains that Japanese railways, including those operated in conquered and annexed Korea, called engines of this wheel arrangement "Pure", an approximation of the American term "Prairie". Ordered by Okura & Company, the locomotives arrived in "kit" form and were assembled at the CGR's Busan shops.
Compared to other Prairie tanks in Japan, Formosa, and Korea, these were among the largest.
After Japan's defeat in 1945, all of the locomotives were split between South Korea (Pureo3) and North Korea (Puroso). Wikipedia notes that which locomotives went to whom cannot be determined.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Puresa |
| Locobase ID | 21046 |
| Railroad | Chosen Government Railway |
| Country | Korea |
| Whyte | 2-6-2T |
| Number in Class | 14 |
| Road Numbers | 80-93/281-294/ |
| Gauge | Std |
| Number Built | 14 |
| Builder | Borsig |
| Year | 1911 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 81,571 / 37,000 |
| Engine Weight (lbs / kg) | 114,640 / 52,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1558 / 5.90 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 / 1.25 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 45 / 22.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 53.90 / 1370 |
| Boiler Pressure (psi / kPa) | 159.50 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.14" x 24.02" / 410x610 |
| Tractive Effort (lbs / kg) | 15,739 / 7139.10 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.18 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 177 - 2.008" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.33 / 3.15 |
| Firebox Area (sq ft / m2) | 102.26 / 9.50 |
| Grate Area (sq ft / m2) | 18.19 / 1.69 |
| Evaporative Heating Surface (sq ft / m2) | 1067 / 99.10 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1067 / 99.10 |
| Evaporative Heating Surface/Cylinder Volume | 187.59 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2901 |
| Same as above plus superheater percentage | 2901 |
| Same as above but substitute firebox area for grate area | 16,310 |
| Power L1 | 3976 |
| Power MT | 322.38 |