Data from Nippon Sharyo Seizo Kaisha, Ltd. , Steam Locomotives Electric Locomotives catalogue (n.d.), p. 5.
The catalogue entry showing this design was drafted in the mid-1950s. An accompanying illustration shows neither railway information nor road numbers. It depicts a wood-burning locomotive with piston valves and a superheater. The tender was laid out expressly to carry wood and had racks for the fuel filling the tender body.
Conversions from metric to "English" measurement systems that yield almost exact equivalents in the latter, a center coupler and "cowcatcher" style pilot ahead of the smokebox , suggest that the locomotives were intended, perhaps, for British possessions in South and Southeast Asia.
(The tube heating surface area given in the specifications was 122.4 sq m (1,448 sq ft ), which represents the tubes' and flues' interior (fire side) diameters. In the same specs, tube and flue diameters are measured at the outside (water side). Locobase adopts the larger diameters as they allow more direct comparisons of various ratios with Anglo-American locomotive practice.)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Superheated, wood-burning |
| Locobase ID | 20949 |
| Railroad | |
| Country | Japan |
| Whyte | 2-8-2 |
| Number in Class | |
| Road Numbers | |
| Gauge | Metre |
| Number Built | |
| Builder | Nippon Sharyo |
| Year | |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.30 / 3.75 |
| Engine Wheelbase (ft / m) | 27.07 / 8.25 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.79 / 15.79 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 91,712 / 41,600 |
| Engine Weight (lbs / kg) | 126,986 / 57,600 |
| Tender Loaded Weight (lbs / kg) | 78,264 / 35,500 |
| Total Engine and Tender Weight (lbs / kg) | 205,250 / 93,100 |
| Tender Water Capacity (gals / ML) | 3960 / 15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 38 / 19 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43.50 / 1105 |
| Boiler Pressure (psi / kPa) | 185.60 / 1280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.72" x 24.02" / 450x610 |
| Tractive Effort (lbs / kg) | 27,353 / 12407.13 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.35 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 126 - 2.008" / 51 |
| Flues (number - dia) (in / mm) | 22 - 5.236" / 133 |
| Flue/Tube length (ft / m) | 15.03 / 4.58 |
| Firebox Area (sq ft / m2) | 130.24 / 12.10 |
| Grate Area (sq ft / m2) | 32.29 / 3 |
| Evaporative Heating Surface (sq ft / m2) | 1579 / 146.69 |
| Superheating Surface (sq ft / m2) | 438 / 40.69 |
| Combined Heating Surface (sq ft / m2) | 2017 / 187.38 |
| Evaporative Heating Surface/Cylinder Volume | 230.31 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5993 |
| Same as above plus superheater percentage | 7311 |
| Same as above but substitute firebox area for grate area | 29,491 |
| Power L1 | 12,114 |
| Power MT | 1164.81 |