Data from "Four-Coupled Passenger Engine, Barry Ry," The Locomotive Magazine, Volume VIII [8] (28 Feb 1903), p. 150; and "Barry Railway", The Locomotive Magazine, Volume XXIX [29] (15 February 1923), p. 36-39. Sharp, Stewart produced works numbers 4367-4369 in May 1898 (Hudswell Clark delivered the other three) and 4497-4501 in June 1899.
The busy Barry Railway had three principal lines, one of which connected Cardiff to Bridgend. Passenger-traffic demands between Barry Island and Cardiff amounted to 5 round trips a day with a 150-ton train of 9-11 carriages over an 11-mile run. The trip took 1/2-hour and included 6 stops. "Considering the nature of the work performed by these engines," said the article, "an average coal consumption of 38-lbs per mile is by now means excessive."
{The three main lines, according to the article, were: "Brigend, via Aberthaw to Barry and Barry Dock, thence by Cadoxton and Cogan (Penarth Dock) to Cardiff; (2) Barry Island to Barry and Barry Dock, thence north through Cadoxton, Wenvoe, Treforest and Pontypridd to Porth, (3) Cardiff to Ely and St. Fagan's."}
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | J |
| Locobase ID | 10280 |
| Railroad | Barry (GWR) |
| Country | Great Britain |
| Whyte | 2-4-2T |
| Number in Class | 8 |
| Road Numbers | 89-91, 94-98/1314-1321 |
| Gauge | Std |
| Number Built | 8 |
| Builder | Sharp, Stewart |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16.42 / 5 |
| Engine Wheelbase (ft / m) | 24.92 / 7.60 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.66 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 87,360 |
| Engine Weight (lbs / kg) | 136,640 / 61,979 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1860 / 7.05 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.80 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 73 / 36.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 67.50 / 1715 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| 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) | 5.49 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 182 - 1.875" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 106 / 9.85 |
| Grate Area (sq ft / m2) | 20.25 / 1.88 |
| Evaporative Heating Surface (sq ft / m2) | 1068 / 99.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1068 / 99.26 |
| Evaporative Heating Surface/Cylinder Volume | 139.47 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3038 |
| Same as above plus superheater percentage | 3038 |
| Same as above but substitute firebox area for grate area | 15,900 |
| Power L1 | 3521 |
| Power MT | 177.71 |