Northern Counties Committee 2-6-4 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class WT (Locobase 10664)

Data from [],png,gif. See also the Railway Preservation Society of Ireland's article on the Jeep, [], last accessed 17 July 2009.

According to the RPSI, this design was based on LMS's Stanier 2-6-4T, but was more "Fowler-esque" in that they used parallel boilers rather than Stanier's coned vessels. In service, the class demonstrated its aptness for the job by wheeling its Belfast-Londonderry trains at speeds up to 80 mph and covering the 95 miles without stopping for water. Also, they were comfortable bi-directional runners and could be turned around in 10 minutes.

They were big and powerful and served the GNR (I) and later the Coras Iompair Eireann (CIE) and the UTA (Ulster Transportation Authority) into the 1970s.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10664
RailroadNorthern Counties Committee (NCC)
Number in Class18
Road Numbers1-10, 50-57
Number Built18
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)37.75 / 11.51
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)37.75 / 11.51
Axle Loading (Maximum Weight per Axle) (lbs / kg)39,200 / 17,781
Weight on Drivers (lbs / kg)117,770 / 53,420
Engine Weight (lbs / kg)194,880 / 88,396
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)194,880 / 88,396
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.90 / 3.50
Minimum weight of rail (calculated) (lb/yd / kg/m)65 / 32.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 1829
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)22,161 / 10052.07
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.31
Heating Ability
Tubes (number - dia) (in / mm)124 - 2" / 51
Flues (number - dia) (in / mm)30 - 5.25" / 133
Flue/Tube length (ft / m)13.49 / 4.11
Firebox Area (sq ft / m2)129.75 / 12.05
Grate Area (sq ft / m2)25 / 2.32
Evaporative Heating Surface (sq ft / m2)1637 / 152.08
Superheating Surface (sq ft / m2)409 / 38
Combined Heating Surface (sq ft / m2)2046 / 190.08
Evaporative Heating Surface/Cylinder Volume191.86
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5000
Same as above plus superheater percentage6000
Same as above but substitute firebox area for grate area31,140
Power L116,784
Power MT942.57

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