Data from "The Locomotive History of the Cambrian Railways", Locomotive Magazine, Volume 19 (15 November 1913), pp. 259-260. Works numbers were 1431-1433 in 1863.
The LM report described this trio as "small", but the photo shows a bulky saddle tank balanced on a relatively short wheelbase. Plasfynnon's stable mates were Mountaineer and Prometheus. The three engines' weatherboards were supplemented by modest cabs in 1897, but were otherwise left alone.
Produced at the same time as the Queen class six-coupled tender engines (Locobase 20130), the class served for about four decades. Withdrawals came in 1900-1905, the Mountaineer having pulled mixed trains on the Kerry branch just prior to its 1905 retirement.
Data from "The Locomotive History of the Cambrian Railways", Locomotive Magazine, Volume 19 (15 October 1913), pp. 233. Works number was 18 in 1860.
Purchased by Thomas Savin to support his several railway construction efforts in Wales, the little four-coupled operated on the Cambrian after it was completed. Its works number indicates just how long after Manning Wardle began its long run of supplying industrial as well as main-line engines over much of the Empire. Ruthin (named for a Welsh town) sported a tall, ornately capped stack and a steam dome between the axles that had a heavily fluted barrel and broad dome.
Its career on the Cambrian ended after only 13 years and it was scrapped in 1873.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | Plasfynnon | Ruthlin |
| Locobase ID | 20133 | 20128 |
| Railroad | Cambrian | Cambrian |
| Country | Great Britain | Great Britain |
| Whyte | 0-4-0ST | 0-4-0 |
| Number in Class | 3 | 1 |
| Road Numbers | 36-38 | 2 |
| Gauge | Std | Std |
| Number Built | 3 | 1 |
| Builder | Sharp, Stewart | Manning Wardle |
| Year | 1863 | 1860 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7 / 2.13 | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 7 / 2.13 | 7 / 2.13 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 29,848 / 13,539 | |
| Weight on Drivers (lbs / kg) | 50,008 / 22,683 | |
| Engine Weight (lbs / kg) | 50,008 / 22,683 | |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 576 / 2.18 | 900 / 3.41 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.07 | 3 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 | |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 48 / 1219 | 48 / 1219 |
| Boiler Pressure (psi / kPa) | 120 / 830 | 120 / 830 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 | 14" x 18" / 356x457 |
| Tractive Effort (lbs / kg) | 8330 / 3778.43 | 7497 / 3400.59 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.00 | |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 109 - 2" / 51 | - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 10.75 / 3.28 | |
| Firebox Area (sq ft / m2) | 55.50 / 5.16 | 50 / 4.65 |
| Grate Area (sq ft / m2) | 9.75 / 0.91 | 8.50 / 0.79 |
| Evaporative Heating Surface (sq ft / m2) | 669 / 62.15 | 625 / 58.06 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 669 / 62.15 | 625 / 58.06 |
| Evaporative Heating Surface/Cylinder Volume | 187.74 | 194.88 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1170 | 1020 |
| Same as above plus superheater percentage | 1170 | 1020 |
| Same as above but substitute firebox area for grate area | 6660 | 6000 |
| Power L1 | 2550 | 2619 |
| Power MT | 224.84 | |