Data from "Locomotives of the Bristol & Exeter Railway," The Locomotive & Railway Carriage & Wagon Review, Vol IV (March 1899), p. 35. Works numbers 2530-2539. Boiler pressure is an estimate.
Conveying stone from the Westleigh's quarries to the B & E main line at Burlescombe required tiny locomotives and this pair filled the fill for more than 20 years. The tramway closed in October 1898, at which point these locomotives were sent to the GWR's Swindon Works.Data from "Tank Locomotive for the Wotton Tramway", Engineering, Volume 27, No 1 (3 January 1879), pp. 17-18. Works number was 210 in December 1877.
Tramway locomotives often required a different arrangement of moving parts from most of the usual versions. This quite small wood-burner proves a case in point. To balance the axle loadings, Bagnall placed the cylinders and valves on a tray inside the frames under the boiler and just ahead of the rear axle. The connecting rods turned cranks on the front axle and the eccentrics were located on the front axle as well. Also, the tanks formed the wings of a saddle under the boiler, leading to the layout's description as an "inverted saddle tank". Enginering reported the boiler as "of ample size, and ...found to give a good steam supply." Apparently because it ran on a short tramway, the footplate crew ran it completely unprotected from the elements.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
---|---|---|
Class | 112 | unknown |
Locobase ID | 10113 | 21039 |
Railroad | Westleigh Tramway | Wotton Tramway |
Country | Great Britain | Great Britain |
Whyte | 0-4-0T | 0-4-0ST |
Number in Class | 2 | 1 |
Road Numbers | 112-113 | |
Gauge | 3' | 3'6" |
Number Built | 2 | 1 |
Builder | B&E | WG Bagnall |
Year | 1875 | 1877 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 5.25 / 1.60 | 6.25 / 1.90 |
Engine Wheelbase (ft / m) | 5.25 / 1.60 | 6.25 / 1.90 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 5.25 / 1.60 | 6.25 / 1.90 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 21,280 / 9652 | |
Engine Weight (lbs / kg) | 21,280 / 9652 | |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 21,280 / 9652 | |
Tender Water Capacity (gals / ML) | 240 / 0.91 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 18 / 9 | |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 24 / 610 | 27 / 686 |
Boiler Pressure (psi / kPa) | 140 / 9.70 | 140 / 9.70 |
High Pressure Cylinders (dia x stroke) (in / mm) | 8" x 12" / 203x305 | 8" x 12" / 203x305 |
Tractive Effort (lbs / kg) | 3808 / 1727.28 | 3385 / 1535.41 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.29 | |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 110 - 1.25" / 32 | 41 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 7.50 / 2.29 | |
Firebox Area (sq ft / m2) | 15.50 / 1.44 | 34 / 3.16 |
Grate Area (sq ft / m2) | 4.60 / 0.43 | 3.75 / 0.35 |
Evaporative Heating Surface (sq ft / m2) | 131 / 12.17 | 194 / 18.02 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 131 / 12.17 | 194 / 18.02 |
Evaporative Heating Surface/Cylinder Volume | 187.64 | 277.88 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 644 | 525 |
Same as above plus superheater percentage | 644 | 525 |
Same as above but substitute firebox area for grate area | 2170 | 4760 |
Power L1 | 1672 | 3285 |
Power MT | 680.66 |