Data from R M Livesey, "Rolling-Stock on the Principal Irish Narrow-Gauge Railways", Proceedings of the Institute of Mechanical Engineers (London: IME, 1912), pp. 606-608; reproduced in Engineering, Volume 94, (2 August 1912), pp. 169-176, table on p. 175. See also "The Railways and Locomotives of the County Donegal Joint Committee", Locomotive Magazine, Volume XXV [25] (15 May 1919), pp. 66-68, 87-90.
Pioneer engines on the County Donegal. Names, works numbers, scrapping dates were: Alice (3023, 1926), Blanche (3012, 1909), and Lydia (3022, 1910). In the Proceedings, Livesy described several classes. He commented on these small tanks' durability, noting that after 31 years they were "still doing good work on branch lines" and were "still useful as a shunting engine."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Class 1 |
| Locobase ID | 2704 |
| Railroad | County Donegal |
| Country | Ireland |
| Whyte | 2-4-0T |
| Number in Class | 3 |
| Road Numbers | 1-3 |
| Gauge | 3' |
| Number Built | 3 |
| Builder | Sharp, Stewart |
| Year | 1881 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6 / 1.83 |
| Engine Wheelbase (ft / m) | 11.50 / 3.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 11.50 / 3.51 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 17,920 / 8128 |
| Weight on Drivers (lbs / kg) | 35,840 / 16,257 |
| Engine Weight (lbs / kg) | 44,800 / 20,321 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 600 / 2.27 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 |
| 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) | 120 / 830 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 |
| Tractive Effort (lbs / kg) | 8209 / 3723.54 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.37 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 45 / 4.18 |
| Grate Area (sq ft / m2) | 9.75 / 0.91 |
| Evaporative Heating Surface (sq ft / m2) | 555 / 51.56 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 555 / 51.56 |
| Evaporative Heating Surface/Cylinder Volume | 180.63 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1170 |
| Same as above plus superheater percentage | 1170 |
| Same as above but substitute firebox area for grate area | 5400 |
| Power L1 | 2132 |
| Power MT | 262.29 |