Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Volume 60, p 97. Works number was 54834 in January 1921.
The HK Prairie tank used essentially identical specs to those for a Geibi line engine shown in Locobase 14613 and was much bigger than its stablemate shown in Locobase 14610. Weight increased slightly and firebox area differed by 1 sq ft; both water and coal capacities also grew. Destined for the northernmost island of the four Main Islands, the locomotive rolled on 60 lb/yard (30 kg/metre) rails.
Data from DeGolyer, Volume 60, pp. 95+. Works number was 54836 in May 1921. (Thanks to Ivo Rutishauser for his 15 December 2025 email pointing out differences between the two works numbers originally shown. Locobase 21294 describes the somewhat larger Prairie tank delivered at the same time.)
Locobase 14611 shows the Iga Railway #4, which presented identical specifications for this small Prairie tank. Coming off the Phildelphia builder's line just two works numbers higher, but considerably smaller than the #1, the 2 was destined for switching duties..
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 1 | 2 |
| Locobase ID | 21294 | 14610 |
| Railroad | Hokkaido Kogyo | Hokkaido Kogyo |
| Country | Japan | Japan |
| Whyte | 2-6-2T | 2-6-2T |
| Number in Class | 1 | 2 |
| Road Numbers | 1 | 2 |
| Gauge | 3'6" | 3'6" |
| Number Built | 1 | 2 |
| Builder | Baldwin | Baldwin |
| Year | 1921 | 1921 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 9.75 / 2.97 | 7.50 / 2.29 |
| Engine Wheelbase (ft / m) | 22 / 6.71 | 19.75 / 6.02 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 | 0.38 |
| Overall Wheelbase (engine & tender) (ft / m) | 22 / 6.71 | 19.75 / 6.02 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,400 / 9652 | |
| Weight on Drivers (lbs / kg) | 63,500 / 28,259 | 44,500 / 20,185 |
| Engine Weight (lbs / kg) | 85,000 / 37,830 | 63,200 / 28,667 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 1200 / 3.79 | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 21.50 / 1 | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 | 25 / 12.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 44 / 1118 | 38 / 965 |
| Boiler Pressure (psi / kPa) | 160 / 1100 | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 13,909 / 6309.02 | 9277 / 4207.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.57 | 4.80 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 152 - 1.75" / 44 | 80 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 9.17 / 2.80 | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 72 / 6.60 | 41 / 3.81 |
| Grate Area (sq ft / m2) | 16 / 1.49 | 9.27 / 0.86 |
| Evaporative Heating Surface (sq ft / m2) | 704 / 65.31 | 368 / 34.19 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 704 / 65.31 | 368 / 34.19 |
| Evaporative Heating Surface/Cylinder Volume | 172.10 | 156.18 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2560 | 1483 |
| Same as above plus superheater percentage | 2560 | 1483 |
| Same as above but substitute firebox area for grate area | 11,520 | 6560 |
| Power L1 | 3052 | 2464 |
| Power MT | 317.88 | 366.21 |