Data from "Goods Tank Locomotive, Sligo, Leitrim and Northern Counties Railway", The Locomotive Magazine (15 June 1906), p.99-100.
Reported to have "...proved very successful in service ...economical in coal consumption," this trio of six-coupled goods locomotives had the typical Beyer, Peacock Belpaire firebox. BP supplied the Sir Henry (works 4592) in 1904 and Enniskillen (works 4720) in 1906. Lough Gill followed in 1917.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Sir Henry |
| Locobase ID | 10561 |
| Railroad | Sligo, Leitrim & Northern Counties |
| Country | Great Britain |
| Whyte | 0-6-4T |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | 5'3" |
| Number Built | 3 |
| Builder | Beyer, Peacock |
| Year | 1904 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 24.58 / 7.49 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.47 |
| Overall Wheelbase (engine & tender) (ft / m) | 24.58 / 7.49 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 82,880 / 37,594 |
| Engine Weight (lbs / kg) | 117,600 / 53,343 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1560 / 5.91 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 46 / 23 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56 / 1422 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 18,885 / 8566.10 |
| Booster (lbs) | 2 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.39 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 158 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 98.30 / 9.14 |
| Grate Area (sq ft / m2) | 18 / 1.67 |
| Evaporative Heating Surface (sq ft / m2) | 1148 / 106.69 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1148 / 106.69 |
| Evaporative Heating Surface/Cylinder Volume | 162.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2880 |
| Same as above plus superheater percentage | 2880 |
| Same as above but substitute firebox area for grate area | 15,728 |
| Power L1 | 3464 |
| Power MT | 276.43 |