Data from George Augustus Nokes, The Evolution of the Steam Engine (London: Railway Publishing, 1899), p. 264, "Four-Coupled Bogie Tank Engines, Cambrian Locomotives," Locomotive Magazine, Vol V (October 1900), p. 158; and See also "The Locomotive History of the Cambrian Rys.", Locomotive Magazine, Volume XX [20] (15 May 1914), p. 129. Works numbers 460-462 in 1895, 558-559 in 1899.
These had the unusual layout of two tube diameters in the boiler. In addition to the 134 2" tubes, the locomotive also deployed 38 1 3/4" tubes (presumably because William Aston of the Cambrian wanted to get the most efficient steaming capability within the limits of the boiler's size).
The first three helped open the newly built 12.75 mile (20.5 km) Ellesmere and Wrexham line.
Data from "Six-Coupled Goods Locomotive, Cambrian Rys," Locomotive Magazine, Vol IX (11 July 1903), p. 19.
Not at all graceful, this stubby all-adhesion design emphasized power and boiler size. Its Belpaire firebox only emphasized its bulky appearance.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 3 | unknown |
| Locobase ID | 10094 | 10350 |
| Railroad | Cambrian | Cambrian |
| Country | Great Britain | Great Britain |
| Whyte | 0-4-4T | 0-4-4T |
| Number in Class | 5 | |
| Road Numbers | 3, 5, 7-9 | |
| Gauge | Std | Std |
| Number Built | 5 | |
| Builder | Nasmyth Wilson | Robert Stephenson & Co |
| Year | 1895 | 1903 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.67 | 15.50 / 4.72 |
| Engine Wheelbase (ft / m) | 20.08 / 6.12 | 15.50 / 4.72 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.38 | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 20.08 / 6.12 | 15.50 / 4.72 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,684 / 15,279 | 32,816 / 14,885 |
| Weight on Drivers (lbs / kg) | 64,596 / 29,300 | 93,296 / 42,318 |
| Engine Weight (lbs / kg) | 101,892 / 46,217 | 93,296 / 42,318 |
| Tender Loaded Weight (lbs / kg) | 70,896 / 32,158 | |
| Total Engine and Tender Weight (lbs / kg) | 164,192 / 74,476 | |
| Tender Water Capacity (gals / ML) | 1440 / 5.45 | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 | 78 / 39 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 63 / 1600 | 61.50 / 1562 |
| Boiler Pressure (psi / kPa) | 150 / 1030 | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 14,037 / 6367.08 | 17,464 / 7921.55 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.60 | 5.34 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 134 - 2" / 51 | 233 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 10.54 | |
| Firebox Area (sq ft / m2) | 90 / 8.36 | 110.70 / 10.29 |
| Grate Area (sq ft / m2) | 13.30 / 1.24 | 20.50 / 1.91 |
| Evaporative Heating Surface (sq ft / m2) | 1010 / 93.87 | 1242 / 115.43 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1010 / 93.87 | 1242 / 115.43 |
| Evaporative Heating Surface/Cylinder Volume | 160.19 | 162.19 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1995 | 3075 |
| Same as above plus superheater percentage | 1995 | 3075 |
| Same as above but substitute firebox area for grate area | 13,500 | 16,605 |
| Power L1 | 3647 | 3605 |
| Power MT | 248.94 | 170.38 |