Data from []; and E Lassueur, "Recent Locomotives for the Dutch Indies Railways," Locomotive Magazine, Volume XXVIII [28] (14 October 1922), pp. 360-364; and "Locomotif C24" in Wikipedia at [] last accessed 10 August 2026. See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.
Wikipedia's account of this engine begins with noting the 1898 completion of a railway running south 74 km (46 miles) from Magelang in central Java to Yogyakarta near the Indian Ocean. Farther north, an existing railway connected the Java Sea port of Semarong with Ambawara 45 km (28 miles) south. Further construction closed the gap between Ambawar and Magelang in 1903-1905 and a branch line opened that left the main line at Secang (near Magelang) and headed west 23 km (14.3 miles) to Parakan.
All of this is to say these small, superheated Prairie tanks used much of this network to haul express and passenger trains over the 120 km (75 miles) between Yogyakarta through Magelang up to Ambawara and further northeast to Kedungjati. Semarang lay about 43 km to the northeast.
A line that essentially bisected the island of Java came into heavy military use during the post-World War II revolution that overthrew a 350-year-long Dutch occupation. C24s "hauled trains for logistics distribution and the mobilization of freedom fighters along the Parakan-Secang-Magelang-Yogyakarta route."
Later in the century, C24s remained in use along the Yogyakarta-Magelang-Parakan section "faithfully hauling mixed trains along the route."
After their replacement by diesels and road transports, all but one C24 were scrapped. C2407 came to rest at the Ambawara Railway Museum in Semagang.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | C24 |
| Locobase ID | 4735 |
| Railroad | Nederlandsch-Indische Spoorweg Mij |
| Country | Indonesia |
| Whyte | 2-6-2T |
| Number in Class | 15 |
| Road Numbers | 271-285/C2401-2415 |
| Gauge | 3'6" |
| Number Built | 15 |
| Builder | Werkspoor |
| Year | 1909 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | / 7.20 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | / 7.20 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 60,848 / 27,600 |
| Engine Weight (lbs / kg) | 93,035 / 42,200 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 4 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 41.70 / 1058 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 19.69" / 400x500 |
| Tractive Effort (lbs / kg) | 17,324 / 7858.04 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.51 |
| 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) | 19.37 / 1.80 |
| Evaporative Heating Surface (sq ft / m2) | 665 / 61.80 |
| Superheating Surface (sq ft / m2) | 158 / 14.70 |
| Combined Heating Surface (sq ft / m2) | 823 / 76.50 |
| Evaporative Heating Surface/Cylinder Volume | 149.77 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3370 |
| Same as above plus superheater percentage | 4011 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |