Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 60, pp. 415. See also Clement Schwinge, "America's Greatest Stake in Rubber", The Outlook (1 June 1927), pp. 156-158. (Thanks to Ivo Rutishauser for his 7 October 2024 email reporting a significant mismatch in the data. He assumed there was a mixup among engines. Locobase believes he may have started the entry using another 2' gauge 0-6-0ST, but never completed it.) Works numbers were 42350-42351 in September 1915.
This United States Rubber Company subsidiary Hollands Americaansche Plantage Maatschappij first planted Para rubber in 1911at what was then the astonishing rate of 14,000 acres (5,684 hectares) in a single year. This pair of saddle tanks rolled on tram roads laid with 14 or 20 lb/yard (7 or 10 kg/metre). They faced at most a 1 deg grade.
In a display of industrialized agricultural monoculture, HAPM would steadily increase its cleared acreage ("until the last trace of jungle has disappeared," necessary, says Schwinges, to avoid rot) to 83,000 acres (33,700 ha) by 1927.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 14667 |
| Railroad | HAPM |
| Country | Sumatra (NEI) |
| Whyte | 0-6-0ST |
| Number in Class | 2 |
| Road Numbers | 1-2 |
| Gauge | 2' |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.08 / 1.55 |
| Engine Wheelbase (ft / m) | 5.08 / 1.55 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5.08 / 1.55 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 16,000 / 7257 |
| Engine Weight (lbs / kg) | 16,000 / 7257 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 180 / 0.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.50 / 1.40 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 9 / 4.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 28 / 711 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 6" x 10" / 152x254 |
| Tractive Effort (lbs / kg) | 1749 / 793.33 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 9.15 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 40 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 5.83 / 1.78 |
| Firebox Area (sq ft / m2) | 16.40 / 1.52 |
| Grate Area (sq ft / m2) | 3.10 / 0.29 |
| Evaporative Heating Surface (sq ft / m2) | 107 / 9.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 107 / 9.94 |
| Evaporative Heating Surface/Cylinder Volume | 326.97 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 496 |
| Same as above plus superheater percentage | 496 |
| Same as above but substitute firebox area for grate area | 2624 |
| Power L1 | 4312 |
| Power MT | 1782.44 |