Deli Spoorweg Mij 2-6-4 Locomotives in Indonesia
Class Details by Steve Llanso of Sweat House Media
Class DSM50-59 (Locobase 4987)
Data from dspace.dial.pipex.com/javatour/ambarawa/locos/DSM55.htm, a site for the Ambarawa Railway Museum maintained by Rob Dickinson; and E Lassueur, "Recent Locomotives for the Dutch Indies Railways," Locomotive Magazine, Volume XXVIII [28] (15 November 1922), pp. 361-364.
See Indra Krishnamurti at [
] for building dates and numbers both of predecessor railways and the Indonesian State Railways. This class was made up of Werkspoor works numbers 463-468 (1920) and 496-498 (1921).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | DSM50-59 |
| Locobase ID | 4987 |
| Railroad | Deli Spoorweg Mij |
| Country | Indonesia |
| Whyte | 2-6-4T |
| Number in Class | 9 |
| Road Numbers | 50-55, 57-59 |
| Gauge | 3'6" |
| Number Built | 9 |
| Builder | Werkspoor |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 30.68 / 9.35 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 30.68 / 9.35 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 18,960 / 8600 |
| Weight on Drivers (lbs / kg) | 56,659 / 25,700 |
| Engine Weight (lbs / kg) | 112,436 / 51,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1320 / 5 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4 / 3.60 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 31 / 15.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51.20 / 1300 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.35" x 21.65" / 390x550 |
| Tractive Effort (lbs / kg) | 14,736 / 6684.15 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.84 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | / 4.50 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 20.99 / 1.95 |
| Evaporative Heating Surface (sq ft / m2) | 829 / 77 |
| Superheating Surface (sq ft / m2) | 233 / 21.60 |
| Combined Heating Surface (sq ft / m2) | 1062 / 98.60 |
| Evaporative Heating Surface/Cylinder Volume | 178.77 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3652 |
| Same as above plus superheater percentage | 4456 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |