Perak Government 4-4-0 Locomotives in Malaya
Class Details by Steve Llanso of Sweat House Media
Class A ("Old A") (Locobase 1119)
Data from Dr. Jonathan DH Smith, "Malayan Railway steam locomotives" on his Standard steam locomotives website at [
], last accessed 15 August 2023.
Several Eight-wheeler tank locomotives went to each of two main railways in Malaya between 1884 and 1898.
Perak' States engine works numbers were 342 (#2) in June 1884, 408 (#3)) in October 1886, 582 (#7) in 1893, 623 (#13) in February 1895, 656 (#16) in July 1896, and (681-682 ( #19-20) in 1898.
Selangor State's 1-3 (works 377-379) were turned out in August 1886; two bore the names Lady Weld and Lady Clementi (#3). By 1899, all three had substituted oil firing for the original coal fuel. Compared to burning "Backau wood" from mangrove tress, which cost $63.67 per 1,000 train miles, oil-fired As averaged $41.11. Given the immediate proximity of Malaya's oil fields, the decision to change fuels seems an obvious choice.
One of these had its tender bowled over by a bull elephant.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | A ("Old A") |
| Locobase ID | 1119 |
| Railroad | Perak Government |
| Country | Malaya |
| Whyte | 4-4-0T |
| Number in Class | 11 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 11 |
| Builder | Hunslet |
| Year | 1884 |
| 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) | 33,600 / 15,241 |
| Engine Weight (lbs / kg) | 49,280 / 22,353 |
| 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) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 39 / 991 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 4882 / 2214.44 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.88 |
| 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) | 7 / 0.65 |
| Evaporative Heating Surface (sq ft / m2) | 370 / 34.37 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 370 / 34.37 |
| Evaporative Heating Surface/Cylinder Volume | 254.39 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 980 |
| Same as above plus superheater percentage | 980 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |