Data from "New Tank Locomotives for the Alexandra (Newport & S Wales) Docks & Railway Co.", The Locomotive Magazine, Vol XV (15 March 1909), p. 46. Works numbers were 1154-1156.
These tanks were described as among the largest tank engines then working in England. The firebox crown was directly stayed which meant, as the report explained, "Every stay is perfectly free to expand, being connected to the outer shell by tee bars and brackets, no rigid stays being employed."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 29 |
| Locobase ID | 10696 |
| Railroad | Alexandra (Newport & S Wales) Docks & Railway |
| Country | Great Britain |
| Whyte | 0-6-2ST |
| Number in Class | 3 |
| Road Numbers | 29-31 |
| Gauge | Std |
| Number Built | 3 |
| Builder | Andrew Barclay |
| Year | 1908 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 118,720 / 53,851 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1440 / 5.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.30 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 22,464 / 10189.51 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 192 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.96 / 3.65 |
| Firebox Area (sq ft / m2) | 96 / 8.92 |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 1148 / 106.69 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1148 / 106.69 |
| Evaporative Heating Surface/Cylinder Volume | 149.92 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | 15,360 |
| Power L1 | 2891 |
| Power MT | |