Duke of Sutherland's Railway 0-4-4 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Dunrobin (Locobase 10155)

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 Sweat House Media

Locobase ID10155
RailroadDuke of Sutherland's Railway
CountryGreat Britain
Number in Class1
Road Numbers
Number Built1
BuilderSharp, Stewart
Valve GearStephenson
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)56,616 / 32,006
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 / 10.30
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 Volume211.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1650
Same as above plus superheater percentage1650
Same as above but substitute firebox area for grate area10,200
Power L14516
Power MT551.28

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