Data from the Industrial Railways Record correspondence file ([], last accessed 24 April 2009).
The author wrote to comment on a previous article on narrow-gauge gasworks locomotives and noted that the engine shown in Record 45 on p. 305 had also appeared in NBL's 1912 catalogue of narrow-gauge engines. His impulse in writing seems not just to offer additional information, but also to record the very tiny dimensions of a design that may have had the smallest water supply of any.
Locobase cannot establish positively that this was a saddle-tank, but the configuration was produced by NBL for industrial sites.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 10248 |
| Railroad | Dawsholm Gasworks |
| Country | Great Britain |
| Whyte | 0-4-0ST |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | 2' |
| Number Built | 1 |
| Builder | North British |
| Year | 1912 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 2.59 / 0.79 |
| Engine Wheelbase (ft / m) | 2.59 / 0.79 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 2.59 / 0.79 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 6777 / 3074 |
| Engine Weight (lbs / kg) | 6777 / 3074 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 26 / 0.10 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 6 / 3 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 20 / 508 |
| Boiler Pressure (psi / kPa) | 140.70 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 5.98" x 9.02" / 152x229 |
| Tractive Effort (lbs / kg) | 1929 / 874.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.51 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 1.83 / 0.17 |
| Evaporative Heating Surface (sq ft / m2) | 83 / 7.71 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 83 / 7.71 |
| Evaporative Heating Surface/Cylinder Volume | 283.07 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 257 |
| Same as above plus superheater percentage | 257 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |