Data from "Great Northern Railway", The Locomotive Magazine, Volume XVI, No 212 (15 April 1910) W T Scott's article in the Railway Preservation Society's 5-Foot 3 journal, January 1968, reproduced on the web at [] (accessed 23 December 2006). Works numbers were 5093-5094 in 1908 and 5531-5532 in 1911.
This quartet was essentially an 0-6-0T with a much larger than usual fuel bunker and water tanks. Scott describes some of the features of these dockside shunters:"In numbers 22 and 23 the leading and trailing horns were in two halves. All four engines had 1 1/4" play for the leading axle and a swivel bushing in the front half of the coupling rods. These features were of course intended for dock shunting. The cylinders were inclined at 1 in 8 and ordinary short travel slide valves were fitted. Spring links were non-adjustable on the driving axles but adjustable on the bogies."
Apparently never superheated, the class carried on until the early 1960s.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | RT |
| Locobase ID | 8029 |
| Railroad | Great Northern |
| Country | Ireland |
| Whyte | 0-6-4T |
| Number in Class | 4 |
| Road Numbers | 22-23, 166-167 |
| Gauge | 5'3" |
| Number Built | 4 |
| Builder | Beyer, Peacock |
| Year | 1908 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.50 / 4.11 |
| Engine Wheelbase (ft / m) | 23.75 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
| Overall Wheelbase (engine & tender) (ft / m) | 23.75 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,920 / 14,479 |
| Weight on Drivers (lbs / kg) | 92,008 |
| Engine Weight (lbs / kg) | 125,440 / 56,899 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1620 / 6.14 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 51 / 25.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 20,230 / 9176.18 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.55 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 212 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.45 / 3.19 |
| Firebox Area (sq ft / m2) | 71.70 / 6.66 |
| Grate Area (sq ft / m2) | 16.30 / 1.51 |
| Evaporative Heating Surface (sq ft / m2) | 1087 / 100.98 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1087 / 100.98 |
| Evaporative Heating Surface/Cylinder Volume | 172.40 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2853 |
| Same as above plus superheater percentage | 2853 |
| Same as above but substitute firebox area for grate area | 12,548 |
| Power L1 | 3410 |
| Power MT | 245.12 |