Tralee & Dingle Light Railway 0-4-2 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 10258)

Data from "Tank Engine for Tralee & Dingle Light Ry, Ireland", The Locomotive Magazine,Vol VIII (17 Jan 1903). 4T works number 514.

If ever Doctor Doolittle's double-llama pushme-pullyu took the rails, it was in the form of this little tank for the T & DLR. Both ends had an enclosed cab and little cow-catchers. Both reflected the alignment of the railway, which was along the roadside at various points and thus needed more alertness and defensibility against the stray cow or pedestrian. The dome stood rather closer to the front cab than the rear. Presumably when running footplate-first, the driver stood in the cab just ahead of the smokebox while the fireman continued feeding the firebox at the other end.

Under the slab-sided tanks, the running gear appeared to require an additional axle between the two driven axles and the trailing truck.

Locobase believes that this oddly proportioned locomotive simply didn't suit the T & DR after a while, which accounts for its scrapping in 1907.

The railway proudly styled itself as the westernmost railway in Europe because the line that began in Tralee ended at Dingle Pier, 32 1/4 miles away and on the western coast of Ireland. (There was a 6-mile branch from Castlegregory Junction at Milepost 10 to Castlegregory.) So hilly and curvy was the alignment that the maximum speed allowed was 12 mph. The railway never was profitable and with the Troubles, World War One, and rising coal prices, the line sank deeper into debt.

After the Great Southern took it over in 1925, the line carried both passengers and freight until 1939, when passenger service ended and the Castlegregory branch was closed. A once-daily then, from 1947, once-weekly freight service (which handled cattle) continued until 1953.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID10258
RailroadTralee & Dingle Light Railway
Number in Class1
Road Numbers4
Number Built1
BuilderHunslet Engine Co
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 4.50 / 1.37
Engine Wheelbase (ft / m)11.33 / 3.45
Ratio of driving wheelbase to overall engine wheelbase 0.40
Overall Wheelbase (engine & tender) (ft / m)11.33 / 3.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)50,624 / 22,963
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)50,624 / 22,963
Tender Water Capacity (gals / ML)600 / 2.27
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36.50 / 927
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)11" x 18" / 279x457
Tractive Effort (lbs / kg)7101 / 3220.96
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 6.32 / 0.59
Evaporative Heating Surface (sq ft / m2)404 / 37.55
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)404 / 37.55
Evaporative Heating Surface/Cylinder Volume204.06
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation885
Same as above plus superheater percentage885
Same as above but substitute firebox area for grate area
Power L1
Power MT

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Wes Barris