Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Volume 27, p. 98. See also "Light Narrow Gauge Locomotive from Japan," Railway Age, Volume 38, No 20 (11 November 1904), p. 683. Works number was 24520 in August 1905.
A 21st-Century reader can only cringe at some of the language used by the writer of this Turn-into-the -20th-Century report on a diminuitive motive power machine. He wrote that the machines were "exactly suited to a lilliputian race like the Japanese." The #1 was "very handy, easy running and easily managed".
Intended as a substitute for horses on industrial railways, the 1 instead was meant to substitute for human-powered carts moved by "armies of coolies." The tramway for which it was intended ran for 16 miles, had curves with a minimum radius of 25 feet and a maximum grade of 4%.
iThe 1's Belpaire boiler was very unusual in a locomotive so small. Relief valves allowed the engine to drift down-grade. It was to "look as much unlike a regular locomotive as possible so as to avoid coming under Government regulations for railways."
The 1 remained in service into the 1920s, running in later years for the Dai Nippon Tramway on its Shizuoka Branch.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 1 |
Locobase ID | 20045 |
Railroad | Atami Keiben Light Railway |
Country | Japan |
Whyte | 0-4-0T |
Number in Class | 1 |
Road Numbers | 1 |
Gauge | 2' |
Number Built | 1 |
Builder | Baldwin |
Year | 1904 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 3.50 / 1.07 |
Engine Wheelbase (ft / m) | 3.50 / 1.07 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 3.50 / 1.07 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 5550 / 2517 |
Engine Weight (lbs / kg) | 5550 / 2517 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 50 / 0.19 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 5 / 2.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 24 / 610 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 4.5" x 10" / 114x254 |
Tractive Effort (lbs / kg) | 861 / 390.54 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.45 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 23 - 1.5" / 38 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 4.58 / 1.40 |
Firebox Area (sq ft / m2) | 11.80 / 1.10 |
Grate Area (sq ft / m2) | 1.91 / 0.18 |
Evaporative Heating Surface (sq ft / m2) | 52 / 4.83 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 52 / 4.83 |
Evaporative Heating Surface/Cylinder Volume | 282.49 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 229 |
Same as above plus superheater percentage | 229 |
Same as above but substitute firebox area for grate area | 1416 |
Power L1 | 2894 |
Power MT | 2299.16 |