Data from dspace.dial.pipex.com/javatour/ambarawa/locos/C1912.htm, a site for the Ambarawa Railway Museum maintained by Rob Dickinson. See also TecBook reprint of SSchsische Maschinenfabrik Richard Hartmann: alle 1910 catalogue,p. 32, previewed in Google Books (last accessed 11 December 2010); and "Lokomotif C19" in Wikipedia (translated by Google) at [], last accessed 24 August 2026. See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.
From the SJS's hub in Semarang on the Java Sea, the railway built a line from 1883 to 1900 to enable extractive industries to exploit "These routes were considered significant vast teak forests and [rich] petroleum reserves." Petroleum deposits in Cepu were first discovered in 1914. When complete, the line headed northeast to Demak and Kudus to arrive at Rembang on the coast, 197 km (122 miles) from Semarang. Within two years, the SJS had extended the line southeast for 70 km (43.5 miles) through Blora and arriving at Cepu.
A photo shows C1912 preserved at the Museum Transportasi Taman Mini Indonesia Indah (TMII). A large bin mounted on the left side of the boiler appears to be the sandbox mentioned by Wikipedia. As with most Indonesian locomotives of the time, light rail weights constrained the C19's size and limited maximum speed to 30 kph (18.6 mph).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | C19 |
| Locobase ID | 4731 |
| Railroad | Samarang-Joana Stoomtram Mij |
| Country | Indonesia |
| Whyte | 0-6-0T |
| Number in Class | 12 |
| Road Numbers | 101-112/C1901-1912 |
| Gauge | 3'6" |
| Number Built | 12 |
| Builder | Hartmann |
| Year | 1898 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.56 / 2 |
| Engine Wheelbase (ft / m) | 6.56 / 2 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 6.56 / 2 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 14,462 / 6560 |
| Weight on Drivers (lbs / kg) | 42,946 / 19,480 |
| Engine Weight (lbs / kg) | 42,946 / 19,480 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 462 / 1.75 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.60 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 24 / 12 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33.50 / 850 |
| Boiler Pressure (psi / kPa) | 169.70 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11.81" x 13.78" / 300x350 |
| Tractive Effort (lbs / kg) | 8276 / 3753.93 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.19 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 43.69 / 4.06 |
| Grate Area (sq ft / m2) | 9.15 / 0.85 |
| Evaporative Heating Surface (sq ft / m2) | 355 / 32.96 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 355 / 32.96 |
| Evaporative Heating Surface/Cylinder Volume | 203.19 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1553 |
| Same as above plus superheater percentage | 1553 |
| Same as above but substitute firebox area for grate area | 7414 |
| Power L1 | 3110 |
| Power MT | 478.95 |