Data from "Londonderry and Lough Swilly Ry and Its Connections," The Locomotive Magazine, Vol IX (4 July 1902), p. 9.
Works numbers were 694 in 1882 and 742-743 in 1883. .
The first new engines on the L&LS, this group of freight tanks operated until their scrapping in 1911-1913. Engine #2 was named Londonderry, and #3 was called Donegal.
The author reported on the "peculiar features" -- its "long, low-pitched boiler and short coupled wheel base; the tanks are carried underneath the bunker.".
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | JT Macky |
| Locobase ID | 2698 |
| Railroad | Londonderry & Lough Swilly |
| Country | Ireland |
| Whyte | 0-6-2T |
| Number in Class | 3 |
| Road Numbers | 1-3 |
| Gauge | 3' |
| Number Built | 3 |
| Builder | Black, Hawthorn |
| Year | 1882 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.25 |
| Engine Wheelbase (ft / m) | 16.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 16.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 53,760 / 24,385 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 600 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.40 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 19" / 330x483 |
| Tractive Effort (lbs / kg) | 9098 / 4126.79 |
| 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) | |
| Evaporative Heating Surface (sq ft / m2) | |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | |
| Evaporative Heating Surface/Cylinder Volume | |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |