Data from "The Locomotive History of the Cambrian Railways", Locomotive Magazine, Volume XX [20] (14 March 1914), pp. 85-86. Works numbers were 1235-1240 in 1864.
The MWR never actually linked Llanidloes and Llandovery to its west as originally planned (a London & North Western Railway line later accomplished that). Instead, when opened in 1864, its 46.2 miles ran south to southeast from Llanidloes to Builth Wells, then southeast to Three Cocks, where a southwesterly extension took it to Talyllyn. A twelve-engine order from Kitson used the same boiler and firebox for both, but this passenger sextet had a shorter stroke and taller drivers than the six goods locomotives shown in Locobase 20359. Two were soon sold in 1868 to the Manchester, Sheffield & Lincoln as their 268-269. The Cambrian ran the trains over the usually financially strapped MWR beginning in 1888.. The three remaining MWR engines, then numbered 2-4, were renumbered 2,23-24. and took over control in 1904.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | unknown |
| Locobase ID | 20358 |
| Railroad | Mid Wales |
| Country | Great Britain |
| Whyte | 0-4-2 |
| Number in Class | 6 |
| Road Numbers | 1-6 |
| Gauge | Std |
| Number Built | 6 |
| Builder | Kitson & Co |
| Year | 1864 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.17 / 2.19 |
| Engine Wheelbase (ft / m) | 13.87 / 4.23 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1440 / 5.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 140 / 9.70 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 11,170 / 5066.63 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 150 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 82.50 / 7.66 |
| Grate Area (sq ft / m2) | 13.37 / 1.24 |
| Evaporative Heating Surface (sq ft / m2) | 903 / 83.89 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 903 / 83.89 |
| Evaporative Heating Surface/Cylinder Volume | 176.38 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1872 |
| Same as above plus superheater percentage | 1872 |
| Same as above but substitute firebox area for grate area | 11,550 |
| Power L1 | 3597 |
| Power MT | |