Data from dspace.dial.pipex.com/javatour/ambarawa/locos/DSM28.htm, a site for the Ambarawa Railway Museum maintained by Rob Dickinson; see also E Lassueur, "Recent Locomotives for the Dutch Indies Railways," Locomotive Magazine, Volume XXVIII [28] (15 November 1922), pp. 299-302.
See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.
As many as 42 of these wood-burning Consolidations were delivered to the Staatspoorwegen; another 11 to Staatspoorwegen-Zuid Sumatra. As was typical of many Continental freight designs, the boiler rode well above the running gear, leaving a broad gap between them. Stability questions posed by so high a boiler centreline on a narrow gauge with 120 m curve radii were met by allowing 70 mm (2.7") play to either side in the Adams truck axle and 30 mm (2.2") traverse to each side in the last coupled axle.
At a maximum valve cutoff of 40%, these engines were required to haul 550 tons up a 0.4% grade at 30 kph (18.6 mph) and hit 50 kph (31 mph) on the level.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | D50 - original |
| Locobase ID | 4755 |
| Railroad | Staatsspoorwegen |
| Country | Indonesia |
| Whyte | 2-8-0 |
| Number in Class | 65 |
| Road Numbers | D5001-5065 |
| Gauge | 3'6" |
| Number Built | 65 |
| Builder | several |
| Year | 1914 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 22.47 / 6.85 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 47.97 / 14.62 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,046 / 10,000 |
| Weight on Drivers (lbs / kg) | 87,744 / 39,800 |
| Engine Weight (lbs / kg) | 105,822 / 48,000 |
| Tender Loaded Weight (lbs / kg) | 76,280 / 34,600 |
| Total Engine and Tender Weight (lbs / kg) | 182,102 / 82,600 |
| Tender Water Capacity (gals / ML) | 4224 / 16 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43.50 / 1106 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.09" x 20.08" / 485x510 |
| Tractive Effort (lbs / kg) | 24,880 / 11285.39 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.53 |
| 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) | 24.22 / 2.25 |
| Evaporative Heating Surface (sq ft / m2) | 1004 / 93.30 |
| Superheating Surface (sq ft / m2) | 327 / 30.40 |
| Combined Heating Surface (sq ft / m2) | 1331 / 123.70 |
| Evaporative Heating Surface/Cylinder Volume | 150.93 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4214 |
| Same as above plus superheater percentage | 5268 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |