Data from Graham Davies at members.tripod.co.uk/Graham_Davies/index-51.html (dead link, but see "Pembroke and Monkton Local History Society--Pembroke Railway" on the Tenby Observer's13 August 2013 edition at [], last accessed 18 October 2022 . See also "Railways in West Wales Part 1B - Pembrokeshire - the Mainline Railways" on Roger Farnworth's blog at [], last accessed 22 September 2022; and "Pembroke and Tenby Railway" in Wikipedia at [], last accessed 18 October 2022 for a full account of the tortuous series of events that accompanied the P&T's 19th Century existence. Works number was 1845 in 1868.
The Pembroke and Tenby was formed in 1859 (as the South Wales, Pembroke & Tenby) with construction beginning soon thereafter. As passenger service grew, the railroad needed a larger, specifically passenger-service engine. The line bought what Graham Davies describes as one of Sharp, Stewart's standard 2-4-0s. And the illustration bears him out. Davies notes that three of this class were built at the time, two for the P&T, one for the Manchester & Milford. In the event, only the Pembroke went to the P&T.
A rebuilding in 1887 raised boiler pressure to 140 psi, but otherwise left the basic dimensions as shown here unchanged. (Although one source said that the boiler had 103 tubes after rebuilding, Davies reports, he adds that the GWR inspector found 156 tubes after the takeover.)
The Great Western took over the P & T in 1896 and renumbered Pembroke as 1361. She was scrapped in 1902.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | Pembroke |
Locobase ID | 4898 |
Railroad | Pembroke & Tenby |
Country | Great Britain |
Whyte | 2-4-0 |
Number in Class | 1 |
Road Numbers | 3/1361 |
Gauge | Std |
Number Built | 1 |
Builder | Sharp, Stewart |
Year | 1868 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 6.50 / 1.98 |
Engine Wheelbase (ft / m) | 14.25 / 4.34 |
Ratio of driving wheelbase to overall engine wheelbase | 0.46 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | |
Engine Weight (lbs / kg) | 55,552 / 25,198 |
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) | 66 / 1676 |
Boiler Pressure (psi / kPa) | 120 / 830 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
Tractive Effort (lbs / kg) | 7913 / 3589.28 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
Heating Ability | |
Tubes (number - dia) (in / mm) | 157 - 2" / 51 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 10.25 / 3.12 |
Firebox Area (sq ft / m2) | 71.40 / 6.63 |
Grate Area (sq ft / m2) | |
Evaporative Heating Surface (sq ft / m2) | 915 / 85.01 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 915 / 85.01 |
Evaporative Heating Surface/Cylinder Volume | 196.60 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | |
Same as above plus superheater percentage | |
Same as above but substitute firebox area for grate area | 8568 |
Power L1 | 3608 |
Power MT |