Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). Works numbers were 2997-2998 in July 1898.
Sturdy Prairie tank pair supplied as a part of a five-locomotive batch to one of the several pre-Imperial Goverment Railway lines that proliferated during Japan's first few decades of railroading. In 1898 the Hankaku had gained approval to build a total of 68.58 miles (110.4 km) of line. By 31 July of that year, the company had completed 14.22 miles (22.9 km).
The other three engines were a 4-4-0 trio shown in Locobase 9622.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 6 |
| Locobase ID | 2894 |
| Railroad | Hankaku |
| Country | Japan |
| Whyte | 2-6-2T |
| Number in Class | 2 |
| Road Numbers | 6-7 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Brooks |
| Year | 1898 |
| 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) | 95,000 / 43,091 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 95,000 / 43,091 |
| Tender Water Capacity (gals / ML) | 1320 / 5 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 41 / 20.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 52 / 1321 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 |
| Tractive Effort (lbs / kg) | 12,946 / 5872.21 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.72 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 210 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.34 / 2.85 |
| Firebox Area (sq ft / m2) | 84 / 7.81 |
| Grate Area (sq ft / m2) | 15.60 / 1.45 |
| Evaporative Heating Surface (sq ft / m2) | 974 / 90.52 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 974 / 90.52 |
| Evaporative Heating Surface/Cylinder Volume | 216.46 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2496 |
| Same as above plus superheater percentage | 2496 |
| Same as above but substitute firebox area for grate area | 13,440 |
| Power L1 | 4296 |
| Power MT | 383.96 |