Data from D[avid] K[innear] Clark, "On the Locomotive Engines in the International Exhibition of 1862," Newton's London Journal of Arts, (1 January 1864), p. 34.
Clark devotes quite a bit of space to this little engine's bulldog qualities, noting that it was rated to take 16 empty wagons up the one-mile Neath Abbey Works' track in 7 minutes (8 mph). The builder supplied some of the earliest locomotives in England and exported little tanks on 3' gauge edge railways to several other countries.
NB: Clark's account credits the engine with 1 1/2" (38 mm) tubes, but that seems low given the difference between his figure for total heating surface and the 139 sq ft calculated for the tubes. Increasing the tube diameter to 1 3/4" (44.5 mm) creates a better balance between firebox and tubes. Another reason for the change is Clark's description of a similar Manning Wardle locomotive immediately above in the text. That engine had 2" tubes.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 9952 |
| Railroad | Neath Abbey |
| Country | Great Britain |
| Whyte | 0-4-0T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 2'8" |
| Number Built | 1 |
| Builder | Neath Abbey Iron Company |
| Year | 1862 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4 / 1.22 |
| Engine Wheelbase (ft / m) | 4 / 1.22 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 4 / 1.22 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 15,344 / 6960 |
| Engine Weight (lbs / kg) | 15,344 / 6960 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 13 / 6.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 28 / 711 |
| Boiler Pressure (psi / kPa) | 80 / 550 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8" x 15" / 203x381 |
| Tractive Effort (lbs / kg) | 2331 / 1057.33 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.58 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 59 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6 / 1.83 |
| Firebox Area (sq ft / m2) | 19 / 1.77 |
| Grate Area (sq ft / m2) | 3.50 / 0.33 |
| Evaporative Heating Surface (sq ft / m2) | 181 / 16.82 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 181 / 16.82 |
| Evaporative Heating Surface/Cylinder Volume | 207.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 280 |
| Same as above plus superheater percentage | 280 |
| Same as above but substitute firebox area for grate area | 1520 |
| Power L1 | 1181 |
| Power MT | 339.37 |