Data from "Locomotive for the Duke of Sutherland," The Locomotive Magazine, Vol V (August 1900), p. 121.
What did one do before the age of the limousine when one had one's own railway and saloon coach? One bought a tank locomotive, of course. And this little tank probably filled the bill nicely. It was designed by David Jones at the Highland Railway's Lochgorm works and produced on the Sharp, Stewart production line as works number 4085.
The railway ran from Helmsdale to Golspie on the east coast of Scotland. The RailScot website's article on this line -- [] -- says "The line was built by the Duke of Sutherland to both help develop his estate (he had coal mines at Brora which were not connected to the railway network) and continue the line of communication up the east coast of the far north of Scotland."
Passers-by often saw trains of royals moving back and forth on outings. Steamindex notes"The cab was designed to accommodate visitors, many of whom were Royals, notably King Edward VII." If the Duke did not take a turn in running the locomotive ....why in the world wouldn't he? And would he have denied the King?
The railway stayed in private hands from 1870 to 1961.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Dunrobin |
| Locobase ID | 10155 |
| Railroad | Duke of Sutherland's Railway |
| Country | Great Britain |
| Whyte | 0-4-4T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Sharp, Stewart |
| Year | 1895 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.25 / 1.90 |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 18.12 / 5.52 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 36,120 |
| Engine Weight (lbs / kg) | 56,616 / 32,006 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 840 / 3.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 18" / 330x457 |
| Tractive Effort (lbs / kg) | 7183 / 3258.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.03 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 68 / 6.32 |
| Grate Area (sq ft / m2) | 11 / 1.02 |
| Evaporative Heating Surface (sq ft / m2) | 585 / 54.35 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 585 / 54.35 |
| Evaporative Heating Surface/Cylinder Volume | 211.55 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1650 |
| Same as above plus superheater percentage | 1650 |
| Same as above but substitute firebox area for grate area | 10,200 |
| Power L1 | 4516 |
| Power MT | 551.28 |