Data from P C Dewhurst, "The Jamaica Government Railway and its Locomotives", Locomotive Magazine, Volume 25 (15 March 1919), p. 43. Works numbers were 674-675 in 1882.
At the time these two contractor's saddle tanks entered service, the JGR had begun construction the westward extension of the 14 mile main line out of Kingston to Spanish Town and the northern extension north over the mountains to Ewarton on Jamaica's northeastern shore.
#2 was later based at Port Royal where it was scrapped in 1907. Hamburg-America Steamship Line bought the 1 for dockside working. The outbreak of war in 1914 led to the 1's confiscation by the JGR.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | Porus & Ewarton contractor |
Locobase ID | 20713 |
Railroad | Jamaican Government |
Country | Jamaica |
Whyte | 0-4-0ST |
Number in Class | 2 |
Road Numbers | 1-2 |
Gauge | Std |
Number Built | 2 |
Builder | Black, Hawthorn |
Year | 1882 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 4.75 / 1.45 |
Engine Wheelbase (ft / m) | 4.75 / 1.45 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 4.75 / 1.45 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 28,000 / 12,701 |
Engine Weight (lbs / kg) | 28,000 / 12,701 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 600 / 2.27 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 23 / 11.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 33 / 838 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 14" / 229x356 |
Tractive Effort (lbs / kg) | 3505 / 1589.84 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.99 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 55 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 8.58 / 2.62 |
Firebox Area (sq ft / m2) | 20 / 1.86 |
Grate Area (sq ft / m2) | 5 / 0.46 |
Evaporative Heating Surface (sq ft / m2) | 237 / 22.02 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 237 / 22.02 |
Evaporative Heating Surface/Cylinder Volume | 229.91 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 600 |
Same as above plus superheater percentage | 600 |
Same as above but substitute firebox area for grate area | 2400 |
Power L1 | 2158 |
Power MT | 339.83 |