Data from "Passenger Locomotive for the Barry Dock & Railway Company", Engineering, Volume 55 (30 June 1893), p. 902; and and "Barry Railway", The Locomotive Magazine, Volume XXIX [29] (15 February 1923), p. 36-39. Vulcan works number were 1348-1349 in August 1892. Sharp, Stewart added two more in March 1895.
According to Engineering at the time the Barry Railway ordered the first pair of four-coupled bogie tanks in 1892, its passenger route covered just 5 3/4 miles (9.25 km) between Barry and Cogan. Its service demanded both relatively high speeds and frequent stops, so the engine had to offer acceleration and braking power in equal measure. A few months after delivery, the Engineering reported that the engines had worked "very satisfactorily". Each was pulling a tare trailing load of 150 tons in 10-12 six-wheel carriages over a providle that included a 0.5 grade rising over 60% of the line's length. Coal consumption averaged 31.52 lb/mile (8.89 kg/km) to heat 30.86 Imperial gallons (37 US gallons) per mile (19.17 Imp gal or 23 US gallons/km). In 1922, when the Barry was taken into the Great Western as part of the Grouping, all four locomotives remained in service and were given new (and very low) road numbers.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | G |
| Locobase ID | 20526 |
| Railroad | Barry |
| Country | Great Britain |
| Whyte | 0-4-4T |
| Number in Class | 2 |
| Road Numbers | 66-69/2-4, 9 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Vulcan Foundry |
| Year | 1892 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.42 / 2.26 |
| Engine Wheelbase (ft / m) | 21.50 / 6.55 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 21.50 / 6.55 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 125,552 / 56,949 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 125,552 / 56,949 |
| Tender Water Capacity (gals / ML) | 1680 / 6.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.65 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 67.50 / 1715 |
| Boiler Pressure (psi / kPa) | 150 / 10.30 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 15,912 / 7217.57 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 181 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.79 / 3.29 |
| Firebox Area (sq ft / m2) | 110 / 10.22 |
| Grate Area (sq ft / m2) | 20.75 / 1.93 |
| Evaporative Heating Surface (sq ft / m2) | 1133 / 105.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1133 / 105.26 |
| Evaporative Heating Surface/Cylinder Volume | 147.96 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3113 |
| Same as above plus superheater percentage | 3113 |
| Same as above but substitute firebox area for grate area | 16,500 |
| Power L1 | 3709 |
| Power MT | |