Jamaican Government 0-4-0 Locomotives in Jamaica


Class Details by Steve Llanso of Sweat House Media

Class Porus & Ewarton contractor (Locobase 20713)

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
ClassPorus & Ewarton contractor
Locobase ID20713
RailroadJamaican Government
CountryJamaica
Whyte0-4-0ST
Number in Class2
Road Numbers1-2
GaugeStd
Number Built2
BuilderBlack, Hawthorn
Year1882
Valve GearStephenson
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 wheelbase1
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 Volume229.91
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation600
Same as above plus superheater percentage600
Same as above but substitute firebox area for grate area2400
Power L12158
Power MT339.83

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