Great Southern & Western 0-4-4 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class 47 (Locobase 10580)

Data from "Bogie Tank Locomotive, Great Southern & Western Ry", The Railway Magazine, Volume XII [12] ( 15 August 1906), p.141

For decades, the GS & WR operated a couple of dozen of these adhesion-leading tank engines on many services. In 1906, the railway still had 20 in service, some handling virtually all of the local traffic on the Cork-Queenstown (Cobh) - Youghal line. A daily mail connecting Queenstown with Cork 12 miles away would cover the distance in 22 minutes.

Little had been done to change the 1880s look of the design. A slender dome sat on the center of the boiler behind a tall capped stack, the running board featured splashers over both drivers and arches over the crank radius on each driver. The trailing bogie had outside, overhead springs on both axles.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10580
RailroadGreat Southern & Western
Number in Class20
Road Numbers47-51, 70-84
Number Built20
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)13.92 / 4.24
Ratio of driving wheelbase to overall engine wheelbase 0.43
Overall Wheelbase (engine & tender) (ft / m)13.92 / 4.24
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)41,216 / 18,695
Engine Weight (lbs / kg)93,632 / 42,471
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1252 / 4.74
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68.50 / 1740
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)8259 / 3746.22
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.99
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)16 / 1.49
Evaporative Heating Surface (sq ft / m2)863 / 80.17
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)863 / 80.17
Evaporative Heating Surface/Cylinder Volume185.42
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2080
Same as above plus superheater percentage2080
Same as above but substitute firebox area for grate area
Power L1
Power MT

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