Data from "Recent Belfast & County Down Ry Locomotives," The Locomotive Magazine, Vol IX (26 September 1903), p. 187. Works numbers were 3853-3854, 3868-3869, 3882-3883.
Often described as "4-coupled double-radial tanks", these bi-directionals were dedicated primarily to supporting the heavy local traffic northeast down the Belfast Lough to Holywood and on to Bangor. Compared to other double-radial tanks in the British Isles, these were about average to a wee bit small.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 5 |
| Locobase ID | 10380 |
| Railroad | Belfast & County Down |
| Country | Ireland |
| Whyte | 2-4-2T |
| Number in Class | 6 |
| Road Numbers | 5, 7-8, 27-29 |
| Gauge | 5'3" |
| Number Built | 6 |
| Builder | Beyer, Peacock |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 20.67 / 6.30 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.34 |
| Overall Wheelbase (engine & tender) (ft / m) | 20.67 / 6.30 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 110,880 / 50,294 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1320 / 5 |
| 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) | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 12,660 / 5742.49 |
| 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) | 87 / 8.09 |
| Grate Area (sq ft / m2) | 14.80 / 1.38 |
| Evaporative Heating Surface (sq ft / m2) | 971 / 90.24 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 971 / 90.24 |
| Evaporative Heating Surface/Cylinder Volume | 173.86 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2368 |
| Same as above plus superheater percentage | 2368 |
| Same as above but substitute firebox area for grate area | 13,920 |
| Power L1 | 4431 |
| Power MT | |