Data from P C Dewhurst, "The Jamaica Government Railway and its Locomotives", Locomotive Magazine, Volume 25 (15 February 1919), p. 22. Works numbers were 78-79 in 1869.
Supporting the opening the Old Harbour extension in 1869, the JRys bought this pair of side tanks. The second engine was named "New Era". They were delivered with domeless boilers. A tendency to knock out the cylinder covers because of priming was addressed by fitting a dome on the front boiler ring. Although apparently satisfactory, the dome's bulk squatting over the small leading truck and cow catcher was visually incongruous. The misfit was accentuated when the railways fitted cabs to the pair, although the shade and rain protection was doubtless welcomed by the footplate crews.
As newer locomotives came on the road, the 5-6 were renumbered 8-9 and 9 later took #10. The two were retired in the mid-1880s, the 8 retiring in September 1886 and 10 in July 1888.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | Extension |
Locobase ID | 20711 |
Railroad | Jamaican Railway |
Country | Jamaica |
Whyte | 2-4-0T |
Number in Class | 2 |
Road Numbers | 5-6/8-9/10 |
Gauge | Std |
Number Built | 2 |
Builder | Yorkshire Engine |
Year | 1869 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 6.17 / 1.88 |
Engine Wheelbase (ft / m) | 12.50 / 3.81 |
Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
Overall Wheelbase (engine & tender) (ft / m) | 12.50 / 3.81 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | |
Engine Weight (lbs / kg) | 45,472 / 20,626 |
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) | 0.90 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 54 / 1372 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
Tractive Effort (lbs / kg) | 4896 / 2220.79 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
Heating Ability | |
Tubes (number - dia) (in / mm) | 124 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | |
Grate Area (sq ft / m2) | 9.50 / 0.88 |
Evaporative Heating Surface (sq ft / m2) | 578 / 53.70 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 578 / 53.70 |
Evaporative Heating Surface/Cylinder Volume | 245.31 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1140 |
Same as above plus superheater percentage | 1140 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |