Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). See also Consul-General Gowey, "Length of Railways in Japan as of July 31", letter of 24 August 1898, in Consular Reports - December 1898, Volume LVIII, No. 219, US House of Representatives, 55th Congress, 2nd Session, Doc. No. 565, Part 4 (Washington, DC: GPO, 1898), p. 565. Works numbers were 2710-2711 in October 1896.
Very similar to the Koya tank engine exported to Japan by Brooks a year later. In both, the subframe stops short of the cylinders, which are bolted directly to the smokebox saddle.
The Nanwa Railway (Naniwa in CG Gowey's report) had completed all 16.6 miles (26.7 km) of its authorized length by 31 July 1898.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 2912 |
| Railroad | Nanwa |
| Country | Japan |
| Whyte | 2-6-2T |
| Number in Class | 2 |
| Road Numbers | 4-5 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Brooks |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.33 / 3.15 |
| Engine Wheelbase (ft / m) | 23.67 / 7.21 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
| Overall Wheelbase (engine & tender) (ft / m) | 23.67 / 7.21 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 74,000 / 33,566 |
| Engine Weight (lbs / kg) | 94,000 / 42,638 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 94,000 / 42,638 |
| Tender Water Capacity (gals / ML) | 1200 / 4.55 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 |
| Tractive Effort (lbs / kg) | 13,148 / 5963.84 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.63 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 210 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.33 / 2.84 |
| Firebox Area (sq ft / m2) | 87.20 / 8.10 |
| Grate Area (sq ft / m2) | 15.20 / 1.41 |
| Evaporative Heating Surface (sq ft / m2) | 982 / 91.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 982 / 91.26 |
| Evaporative Heating Surface/Cylinder Volume | 218.24 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2280 |
| Same as above plus superheater percentage | 2280 |
| Same as above but substitute firebox area for grate area | 13,080 |
| Power L1 | 3782 |
| Power MT | 338.02 |