Ulster 4-2-0 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class Express (Locobase 9058)

Data from Francis Whishaw, Railroads of Great Britain and Ireland, London: John Weale, 1842, pp. 468-469.

Express and Fury had 13" diameter cylinders, Spitfire had 14" cylinders (which yielded 2,300 lb tractive effort). Whishaw reported that these locomotives -- Express, Fury, and Spitfire -- were averaging 25.43 mph in September 1839. Gross train weights averaged 40 tons.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9058
Number in Class3
Road Numbers
Number Built3
BuilderSharp, Roberts
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)32,480 / 14,733
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)960 / 3.64
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 1829
Boiler Pressure (psi / kPa)56 / 3.90
High Pressure Cylinders (dia x stroke) (in / mm)13" x 18" / 330x457
Tractive Effort (lbs / kg)2011 / 912.18
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)150 - 1.625" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.33 / 2.54
Firebox Area (sq ft / m2)49.52 / 4.60
Grate Area (sq ft / m2)11.67 / 1.08
Evaporative Heating Surface (sq ft / m2)579 / 53.81
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)579 / 53.81
Evaporative Heating Surface/Cylinder Volume209.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation654
Same as above plus superheater percentage654
Same as above but substitute firebox area for grate area2773
Power L12009
Power MT

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