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 Middle Run Media | |
|---|---|
| Class | WT |
| Locobase ID | 10664 |
| Railroad | Northern Counties Committee (NCC) |
| Country | Ireland |
| Whyte | 2-6-4T |
| Number in Class | 18 |
| Road Numbers | 1-10, 50-57 |
| Gauge | 5'3" |
| Number Built | 18 |
| Builder | Derby |
| Year | 1946 |
| Valve Gear | Walschaert |
| 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) | |
| 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 / 1380 |
| 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 Volume | 191.86 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5000 |
| Same as above plus superheater percentage | 6000 |
| Same as above but substitute firebox area for grate area | 31,140 |
| Power L1 | 16,784 |
| Power MT | 942.57 |