Data from "Cooke Locomotive for Japan", Locomotive Engineering, Vol X, No 8 (August 1897), p. 613. 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 2370-2371 in June 1897.
Smaller than the other radial tank engines being built for Japan during this period (see, e.g. Locobases 4792 & 5491), this pair represented an unusual source in their Paterson (NJ) builder. In 1898, the Boso Railway was authorized for 53.03 miles (85.4 km) of which 26.74 miles (43 km) had been built.
NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2700 |
| Locobase ID | 9943 |
| Railroad | Boso |
| Country | Japan |
| Whyte | 0-6-2T |
| Number in Class | 2 |
| Road Numbers | 2700-2701 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Cooke |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 19.25 / 5.87 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 19.25 / 5.87 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 61,000 / 27,669 |
| Engine Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 11,333 / 5140.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.38 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 151 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.92 |
| Firebox Area (sq ft / m2) | 75 / 6.97 |
| Grate Area (sq ft / m2) | 13.70 / 1.27 |
| Evaporative Heating Surface (sq ft / m2) | 858 / 79.74 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 858 / 79.74 |
| Evaporative Heating Surface/Cylinder Volume | 209.75 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2192 |
| Same as above plus superheater percentage | 2192 |
| Same as above but substitute firebox area for grate area | 12,000 |
| Power L1 | 4340 |
| Power MT | 470.56 |