Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p.86 . Works numbers were 14665-14666 in January 1896.
The drafter of the specifications sheet in the Spec book apparently miscalculated one of two numbers when he drew up the order for these two locomotives. He entered 85 tubes for the boiler and 446.5 sq ft for the evaporative heating surface, of which 50 sq ft was firebox. If one subtracts the firebox from the EHS, he gets 397 sq ft, which is 10% higher than what he gets if he calculates the tube heating surface of 85 tubes of this length. But if he enters 95 tubes, all squares up.
Whatever the true dimensions, this pair of double-enders served the Bantan, Sanyo (1903 - renumbered 1-2), and Toya (1909) private railways in succession before being nationalized as JNR class 200. 201 served until 1961 while 200 endured until 1968.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 4 / 200 |
| Locobase ID | 12180 |
| Railroad | Bantan |
| Country | Japan |
| Whyte | 2-4-2T |
| Number in Class | 2 |
| Road Numbers | 4-5/200-201 |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.67 / 1.73 |
| Engine Wheelbase (ft / m) | 20.17 / 6.15 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.28 |
| Overall Wheelbase (engine & tender) (ft / m) | 20.17 / 6.15 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 34,000 / 15,422 |
| Engine Weight (lbs / kg) | 50,000 / 22,680 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 50,000 / 22,680 |
| Tender Water Capacity (gals / ML) | 750 / 2.84 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 8393 / 3807.01 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.05 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 85 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.04 / 2.76 |
| Firebox Area (sq ft / m2) | 50 / 4.65 |
| Grate Area (sq ft / m2) | 9.70 / 0.90 |
| Evaporative Heating Surface (sq ft / m2) | 447 / 41.54 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 447 / 41.54 |
| Evaporative Heating Surface/Cylinder Volume | 189.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1552 |
| Same as above plus superheater percentage | 1552 |
| Same as above but substitute firebox area for grate area | 8000 |
| Power L1 | 3313 |
| Power MT | 429.64 |