Data from John Bourne, CE, Recent Improvements in the Steam-Engine (London: Longmans, Green & Co, 1880), p. 236.
Bourne did not indicate if this locomotive was intended for service anywhere and its data do not match up precisely with any Single then in service in England. The accompanying illustration shows no railway markings, either. Springs mounted over the frame suspended the leading carrying axle. Likewise, the single driving axle had springs over the axle. The drivers were enclosed by open-work splashers.
Crew protection had progressed from a simple vertical weatherboard ahead of the crew to include an inclined overhead panel.over about 1/2 of the footplate.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 8456 |
| Railroad | |
| Country | Great Britain |
| Whyte | 2-2-2 |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Robert Stephenson & Co |
| Year | 1867 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 15.75 / 4.80 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 30,688 / 13,920 |
| Weight on Drivers (lbs / kg) | 30,688 / 13,920 |
| Engine Weight (lbs / kg) | 68,208 / 30,939 |
| 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) | 51 / 25.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 78 / 1981 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 10,741 / 4872.04 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 2.86 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 161 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.33 / 3.45 |
| Firebox Area (sq ft / m2) | 83 / 7.71 |
| Grate Area (sq ft / m2) | 13.75 / 1.28 |
| Evaporative Heating Surface (sq ft / m2) | 1043 / 96.90 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1043 / 96.90 |
| Evaporative Heating Surface/Cylinder Volume | 203.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2406 |
| Same as above plus superheater percentage | 2406 |
| Same as above but substitute firebox area for grate area | 14,525 |
| Power L1 | 6479 |
| Power MT | 465.45 |