Great Northern 4-2-2 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class JS (Locobase 10507)

Data from "Locomotives of Great Northern Ry, Ireland," The Locomotive Magazine, Vol XI (15 May 1905), p. 80. See also Steamindex's GNR(I) page -- [], last accessed 12 June 2009. Works numbers were 2519-2520.

This pair -- Victoria and Albert -- pulled the Limited Mail trains from Dublin to Belfast in about 3 hours for about a decade. They were transferred to Howth in 1896 and taken out of service in 1904 -- according to Steamindex. But, see Locobase 10508 for their transformation to 4-coupled bogie passenger engines, a reconstruction reported in Locomotive Magazine in May 1905.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10507
RailroadGreat Northern
Number in Class2
Road Numbers88-89
Number Built2
BuilderBeyer, Peacock
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)18.96 / 5.78
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)22 / 6.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1500 / 5.68
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.20 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)79 / 2007
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x559
Tractive Effort (lbs / kg)8484 / 3848.28
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)164 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)14.84 / 1.38
Evaporative Heating Surface (sq ft / m2)970 / 90.15
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)970 / 90.15
Evaporative Heating Surface/Cylinder Volume189.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2078
Same as above plus superheater percentage2078
Same as above but substitute firebox area for grate area
Power L1
Power MT

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Wes Barris