Data from "Six-coupled Bogie Tank Locomotive, Donegal Railway" The Locomotive & Railway Carriage & Wagon Review, Volume IV (September 1899), p.136. See also "Irish Light Railway Locomotives", Railway Engineer, Volume 21, No..1 (January 1900), pp. 10-12.
Ten-Wheeler tanks that represented a useful increase of power over the 2-4-0 tanks. Their frames were placed outside the wheels to allow for the widest possible firebox.
At the same time, reported RWA Salter in Railway Magazine in Feb 1931 (see cdrrs.future.easyspace.com/510d.html), they were too short of fuel and water to serve the system adequately. This led to the Class 3 and Class 4 locomotives.
SJ Carse, writing in the Railway Preservation Society of Ireland's Five Foot Three (appearing on [], visited in November 2002), says they seem to have "more satisfactory than similar locos on other line".
Names, works numbers, and scrapping dates were: Meenglas (4573, 1935), Drumboe (4574, 1931), Inver (4575, 1931), Finn (4576, 1931), Foyle (4577, 1937). and Columbkille (4578, 1937).
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | Class 2 |
Locobase ID | 2703 |
Railroad | County Donegal |
Country | Ireland |
Whyte | 4-6-0T |
Number in Class | 6 |
Road Numbers | 4-9 |
Gauge | 3' |
Number Built | 6 |
Builder | Neilson, Reid |
Year | 1893 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 8 / 2.44 |
Engine Wheelbase (ft / m) | 16.62 / 5.07 |
Ratio of driving wheelbase to overall engine wheelbase | 0.48 |
Overall Wheelbase (engine & tender) (ft / m) | 16.62 / 5.07 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 54,096 / 24,538 |
Engine Weight (lbs / kg) | 68,544 / 31,091 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 780 / 2.95 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 42 / 1067 |
Boiler Pressure (psi / kPa) | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
Tractive Effort (lbs / kg) | 11,900 / 5397.76 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.55 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 122 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | |
Firebox Area (sq ft / m2) | 57 |
Grate Area (sq ft / m2) | 9.75 / 0.91 |
Evaporative Heating Surface (sq ft / m2) | 604 / 56.13 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 604 / 56.13 |
Evaporative Heating Surface/Cylinder Volume | 169.50 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1463 |
Same as above plus superheater percentage | 1463 |
Same as above but substitute firebox area for grate area | 8550 |
Power L1 | 2620 |
Power MT | 320.33 |