Data from Allan C Baker's article on the Bagnall Articulateds originally published in The Industrial Railway Record (No 16 - December 1967) and archived online at [] 22 July 2004). Works number was 3024 in 1953.
See Locobase 6265 for a full discussion of the Bagnall articulated design. This particular locomotive served the Sittingbourne works for a time, but was sold off to the Welshpool & Llanfair Light Railway after only infrequent use.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Monarch |
| Locobase ID | 6266 |
| Railroad | Bowaters Lloyd Pulp & Paper Mills |
| Country | Great Britain |
| Whyte | 0-4+4-0 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 2'6" |
| Number Built | 1 |
| Builder | WG Bagnall |
| Year | 1953 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.25 / 0.99 |
| Engine Wheelbase (ft / m) | 18.25 / 5.56 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.18 |
| Overall Wheelbase (engine & tender) (ft / m) | 18.25 / 5.56 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 63,840 / 28,957 |
| Engine Weight (lbs / kg) | 63,840 / 28,957 |
| 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) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 27 / 13.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 24 / 610 |
| Boiler Pressure (psi / kPa) | 185 / 1280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 12" / 229x305 (4) |
| Tractive Effort (lbs / kg) | 12,737 / 5777.41 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.01 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 36 / 3.35 |
| Grate Area (sq ft / m2) | 11.50 / 1.07 |
| Evaporative Heating Surface (sq ft / m2) | 432 / 40.15 |
| Superheating Surface (sq ft / m2) | 70 / 6.51 |
| Combined Heating Surface (sq ft / m2) | 502 / 46.66 |
| Evaporative Heating Surface/Cylinder Volume | 244.46 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2128 |
| Same as above plus superheater percentage | 2425 |
| Same as above but substitute firebox area for grate area | 7592 |
| Power L1 | 5201 |
| Power MT | 718.44 |