Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Vol 60, p. 61. Works numbers were 54837-54839 in May 1921.
A trio of tanks that duplicated the basic specifications of several other engines manufactured by Baldwin for Japanese forestry companies and state agencies.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 14600 |
| Railroad | Imperial Estate |
| Country | Japan |
| Whyte | 0-4-2T |
| Number in Class | 3 |
| Road Numbers | 1, 2, 7 |
| Gauge | 2'6" |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.75 / 1.14 |
| Engine Wheelbase (ft / m) | 9.58 / 2.92 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | 9.58 / 2.92 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 15,900 / 7212 |
| Engine Weight (lbs / kg) | 22,800 / 10,342 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 22,800 / 10,342 |
| Tender Water Capacity (gals / ML) | 300 / 1.14 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 13 / 6.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 28 / 711 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8.5" x 12" / 216x305 |
| Tractive Effort (lbs / kg) | 3948 / 1790.78 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.03 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 57 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.66 / 2.03 |
| Firebox Area (sq ft / m2) | 23 / 2.14 |
| Grate Area (sq ft / m2) | 6.20 / 0.58 |
| Evaporative Heating Surface (sq ft / m2) | 170 / 15.79 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 170 / 15.79 |
| Evaporative Heating Surface/Cylinder Volume | 215.70 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 930 |
| Same as above plus superheater percentage | 930 |
| Same as above but substitute firebox area for grate area | 3450 |
| Power L1 | 2531 |
| Power MT | 701.87 |