Data from [] . See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways
Data from internationalsteam.co.uk/ambarawa/locos/D1410.htm, a site for the Ambarawa Railway Museum maintained by Rob Dickinson. (The particular locomotive he references is from the Hanomag batch -- works #9644-9655 -- of 1921.) See also in id.Wikipedia at Lokomotif D14"(translated by Google" at [], last accessed 27 May 2026.
See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways. Hanomag and Werkspoor split the order. Krishnamurti's data differs (e.g., 115.5 sq m for the evaporative heating surface, 36.0 sq m for the superheater, 48,960 kg adhesion weight, 68,660 kg total engine weight). Could they refer to the Werkspoor locomotives -- works# 499-510 -- of 1922?
As translated by Google, Wikipedia Indonesia describes the class as popular for negotiating the mountainouse areas in Java despite the use of six- and eight-axle Mallets. "Their compact appearance and ease of operation," the entry reports, "make them reliable for serving mountainous routes with steep gradients and narrow-radius curves." The railroad calculated its output at 1,187 cylinder horsepower. D1400s speed ratings ranged from 45-70 kph (28-43.5 mph).
By the end of their service in the late 1970s and early 1970s, D14s had been reassigned to shunting duties. Much later, the shops at Balai Yasa Pengok undertook a nine-month restoration of D1410, the sole survivor, which included converting the fuel to teak wood.
It began museum runs in February 2020 and continued as the Kluthuk Jaladara tourist train head-end power.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | D51 | SS 1401/D1401 |
| Locobase ID | 4756 | 4750 |
| Railroad | Staatsspoorwegen | Staatsspoorwegen |
| Country | Indonesia | Indonesia |
| Whyte | 2-8-2 | 2-8-2T |
| Number in Class | 10 | 24 |
| Road Numbers | 1501-1510/D5101-5110 | 1401-1424/D1401-1424 |
| Gauge | 3'6" | 3'6" |
| Number Built | 10 | 24 |
| Builder | Hartmann | several |
| Year | 1920 | 1921 |
| Valve Gear | Heusinger | |
| 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) | 89,948 / 40,800 | 111,112 / 50,400 |
| Engine Weight (lbs / kg) | 118,607 / 53,800 | 156,747 / 71,100 |
| 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) | 37 / 18.50 | 46 / 23 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 42.10 / 1070 | 43.50 / 1106 |
| Boiler Pressure (psi / kPa) | 170.70 / 1180 | 170.70 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18.9" x 19.69" / 480x500 | 19.09" x 23.62" / 485x600 |
| Tractive Effort (lbs / kg) | 24,240 / 10995.09 | 28,711 / 13023.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.71 | 3.87 |
| 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) | 26.90 / 2.50 | 25.82 / 2.40 |
| Evaporative Heating Surface (sq ft / m2) | 1291 / 120 | 1145 / 106.41 |
| Superheating Surface (sq ft / m2) | 430 / 40 | 391 / 36.34 |
| Combined Heating Surface (sq ft / m2) | 1721 / 160 | 1536 / 142.75 |
| Evaporative Heating Surface/Cylinder Volume | 201.92 | 146.33 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 4592 | 4407 |
| Same as above plus superheater percentage | 5740 | 5509 |
| Same as above but substitute firebox area for grate area | ||
| Power L1 | ||
| Power MT | ||