Staatsspoorwegen 2-4-0 Locomotives in Indonesia


Class Details by Steve Llanso of Sweat House Media

Class B13 (Locobase 4712)

[link] for data

See Indra Krishnamurti at [link] for building dates and numbers both of predecessor railways and the Indonesian State Railways.


Class B50 (Locobase 4719)

Data from Indra Krishnamurti at [link] (later [link], 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
ClassB13B50
Locobase ID4712 4719
RailroadStaatsspoorwegenStaatsspoorwegen
CountryIndonesiaIndonesia
Whyte2-4-0T2-4-0
Number in Class1167
Road Numbers99-109/B1301-131119-46, 60-70, 77-82, 85-94, 134-138+/B5001-5014
Gauge3'6"3'6"
Number Built1167
BuilderHanomagSharp, Stewart
Year18861880
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 / 18,50033,730 / 15,300
Engine Weight (lbs / kg)59,525 / 27,00044,753 / 20,300
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)59,525 / 27,000
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 1728 / 14
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52.30 / 132955.60 / 1412
Boiler Pressure (psi / kPa)145 / 1000145 / 1000
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 20.04" / 380x50915" x 18" / 381x457
Tractive Effort (lbs / kg)10,569 / 4794.028978 / 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 / 1.1011.84 / 1.10
Evaporative Heating Surface (sq ft / m2)601 / 55.90538 / 49.98
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)601 / 55.90538 / 49.98
Evaporative Heating Surface/Cylinder Volume147.41146.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation17171717
Same as above plus superheater percentage17171717
Same as above but substitute firebox area for grate area
Power L1
Power MT

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