Data from [] . See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways. His tables show that two class of 0-8-0 tank locomotives were later designated C10 by the State railways. Engines 301-306 of the Samarang-Joana Stoomtram Mij (Hartmann, 1913) and 201-205 of the Serajoedal Stoomtram Mij (Hartmann, 1914 and 1915 (205)) were combined as a single class, suggesting that they were nearly identical.
Data from dspace.dial.pipex.com/javatour/ambarawa/locos/D1505.htm, a site for the Ambarawa Railway Museum maintained by Rob Dickinson. See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways; and "Locomotif D15" in Wikipedia at [], last accessed 16 August 2026.
Dickinson notes that this used the Klien Lindner lateral-axle movement system. Wikipedia gives a concise summary of the SJS's history:
"To meet the need for urban transportation, the private railway company *Semarang-Joeana Stoomtram Maatschappij* (SJS) began operating a tram service in 1881, connecting Jurnatan (serving as the central station [in the port city of Semarang ]) with Bulu [73.2 km (45.5 miles) to the southwest] and Jomblang. SJS was the first company to utilize tram locomotives on the island of Java.
However, in 1883, SJS began expanding its railway lines eastward toward Mayong, Demak, and eventually Blora. To facilitate the transport of sugar to the Port of Semarang, the SJS railway line was routed through numerous sugar factory areas in the eastern part of Semarang."
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | D10 | D15 |
| Locobase ID | 4747 | 4751 |
| Railroad | Samarang-Joana Stoomtram Mij | Samarang-Joana Stoomtram Mij |
| Country | Indonesia | Indonesia |
| Whyte | 0-8-0T | 0-8-0T |
| Number in Class | 5 | |
| Road Numbers | 307-311/D1501-1505 | |
| Gauge | 3'6" | 3'6" |
| Number Built | 5 | |
| Builder | Hartmann | Hanomag |
| Year | 1913 | 1931 |
| 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) | 66,139 / 30,000 | 66,139 / 30,000 |
| Engine Weight (lbs / kg) | 66,139 / 30,000 | 66,139 / 30,000 |
| 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) | 28 / 14 | 28 / 14 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 33.50 / 850 | 34.30 / 870 |
| Boiler Pressure (psi / kPa) | 171.10 / 1180 | 171.10 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.96" x 15.75" / 380x400 | 14.96" x 15.75" / 380x400 |
| Tractive Effort (lbs / kg) | 15,303 / 6941.33 | 14,946 / 6779.40 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.32 | 4.43 |
| 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) | 12.91 / 1.20 | 12.91 / 1.20 |
| Evaporative Heating Surface (sq ft / m2) | 454 / 42.20 | 431 / 40.10 |
| Superheating Surface (sq ft / m2) | 143 / 13.30 | 178 / 16.50 |
| Combined Heating Surface (sq ft / m2) | 597 / 55.50 | 609 / 56.60 |
| Evaporative Heating Surface/Cylinder Volume | 141.69 | 134.51 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 2209 | 2209 |
| Same as above plus superheater percentage | 2739 | 2849 |
| Same as above but substitute firebox area for grate area | ||
| Power L1 | ||
| Power MT | ||