Java State/Staatsspoorwegen 2-8-8-0 Locomotives in Indonesia
Class Details by Steve Llanso of Sweat House Media
Class DD50 (Locobase 4759)
Mallet Data from [
] . Works numbers were 53154-53161 in 1916.
See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | DD50 |
| Locobase ID | 4759 |
| Railroad | Java State/Staatsspoorwegen |
| Country | Indonesia |
| Whyte | 2-8-8-0 |
| Number in Class | 8 |
| Road Numbers | 1201-1208/DD5001-5008 |
| Gauge | 3'6" |
| Number Built | 8 |
| Builder | Alco-Brooks |
| Year | 1916 |
| Valve Gear | |
| 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) | 184,626 / 83,745 |
| Engine Weight (lbs / kg) | 203,654 / 92,376 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 203,654 / 92,376 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 38 / 19 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42.40 / 1078 |
| Boiler Pressure (psi / kPa) | 200.20 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.52" x 24.02" / 445x610 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 27.99" x 24.02" / 711x610 |
| Tractive Effort (lbs / kg) | 42,522 / 19287.68 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.34 |
| 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) | 44.65 / 4.15 |
| Evaporative Heating Surface (sq ft / m2) | 2335 / 217 |
| Superheating Surface (sq ft / m2) | 560 / 52 |
| Combined Heating Surface (sq ft / m2) | 2895 / 269 |
| Evaporative Heating Surface/Cylinder Volume | 348.39 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 8939 |
| Same as above plus superheater percentage | 10,637 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |