[] for data
See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.
Data from Indra Krishnamurti at [] (later [], last accessed 4 December 2022) for building dates and numbers both of predecessor railways and the Indonesian State Railways.. (Thanks to Jon B for his 29 November 2022 email reporting a different outcome for the class from that reported by Ziel and Eagleson (see below). Works numbers were 2857-2862, 2873-2878 in 1880; 2918-2923, 2934-2937 in 1881; 2957-2962, 3012-3015, 3088-3089 in 1882; 3104-3019 in 1883, 3194-3199 in 1884, 3144-3148 in 1884, 3705-3709 in 1891, 4069, 4108-4112, 4136-4137 in 1895. (Works numbers from B Rumary's Sharp, Stewart production list supplied in August 2022 by Allen Stanley from his extensive Rail Data Exchange collection.)
Among the first Indonesian locomotives to be imported, these little 2-4-0s came in small bunches over a six-year period. Photographs show a very upright profile with a tall steam drum behind a shorter sand drum.
Ziel and Eagleson (1973) noted with some amazement that "all of the B50 class ...were believed to be still operating nearly a century later." Jon B reported in 2022, however, "There were sixty-odd of them built, but all but 17 were gone by Indonesian independence. The survivors, the last of which worked into the 1980s, were B5001-14 (Java) and B5051-53 (South Sumatra)."
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | B13 | B50 |
| Locobase ID | 4712 | 4719 |
| Railroad | Staatsspoorwegen | Staatsspoorwegen |
| Country | Indonesia | Indonesia |
| Whyte | 2-4-0T | 2-4-0 |
| Number in Class | 11 | 67 |
| Road Numbers | 99-109/B1301-1311 | 19-46, 60-70, 77-82, 85-94, 134-138+/B5001-5014 |
| Gauge | 3'6" | 3'6" |
| Number Built | 11 | 67 |
| Builder | Hanomag | Sharp, Stewart |
| Year | 1886 | 1880 |
| Valve Gear | ||
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | ||
| Engine Wheelbase (ft / m) | ||
| Ratio of driving wheelbase to overall engine wheelbase | ||
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 40,785 / 18,500 | 33,730 / 15,300 |
| Engine Weight (lbs / kg) | 59,525 / 27,000 | 44,753 / 20,300 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| 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 | 28 / 14 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 52.30 / 1329 | 55.60 / 1412 |
| Boiler Pressure (psi / kPa) | 145 / 1000 | 145 / 1000 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.96" x 20.04" / 380x509 | 15" x 18" / 381x457 |
| Tractive Effort (lbs / kg) | 10,569 / 4794.02 | 8978 / 4072.36 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.86 | 3.76 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | ||
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | ||
| Firebox Area (sq ft / m2) | ||
| Grate Area (sq ft / m2) | 11.84 / 1.10 | 11.84 / 1.10 |
| Evaporative Heating Surface (sq ft / m2) | 601 / 55.90 | 538 / 49.98 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 601 / 55.90 | 538 / 49.98 |
| Evaporative Heating Surface/Cylinder Volume | 147.41 | 146.13 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1717 | 1717 |
| Same as above plus superheater percentage | 1717 | 1717 |
| Same as above but substitute firebox area for grate area | ||
| Power L1 | ||
| Power MT | ||