Irish Industrial Minerals Co, Ltd 0-6-0 Locomotives in Ireland

Class Details by Steve Llanso of Sweat House Media

Class King George (Locobase 20043)

Data from "Narrow Gauge Quarry Locomotive for Achill Island", Locomotive Magazine, Volume 18 (15 June 1912), p. 116. Works number was 1945 in October 1911.

Achilll Island lies just off the mainland of northwest Ireland in County Mayo. A two-foot-gauge steam railway was laid by the IIMC on the island to carry the amethystine quartz (known as Achill Stone) from two quarries. According to Ireland's website entry on Achill , the principal line transported "whitestone from a quarry in Slievemore to Purteen harbour. The second line was from a quarry in Dereens. This line ran six wagons and ended at the pier at Darby's Point, Cloughmore. In 1920 the Keel and Kildavnet industrial lines were closed." (from [], last accessed 26 December 2015.

Bagnall's little engine's most notable feature was its circular steel firebox, that was, said LM, "particularly easy to wash out, there being no stays or cramped water spaces ...It has given every satisfaction in working, being a very easy steamer."

Principal Dimensions by Steve Llanso of Sweat House Media

ClassKing George
Locobase ID20043
RailroadIrish Industrial Minerals Co, Ltd
Number in Class1
Road Numbers
Number Built1
BuilderWG Bagnall
Valve Gear
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)9333 / 4233
Weight on Drivers (lbs / kg)28,000 / 12,701
Engine Weight (lbs / kg)28,000 / 12,701
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)28,000 / 12,701
Tender Water Capacity (gals / ML)250 / 0.95
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.55 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)16 / 8
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)25.50 / 648
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)9" x 11" / 229x279
Tractive Effort (lbs / kg)4455 / 2020.76
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.29
Heating Ability
Tubes (number - dia) (in / mm)69 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.17 / 2.19
Firebox Area (sq ft / m2)20.50 / 1.90
Grate Area (sq ft / m2) 4.50 / 0.42
Evaporative Heating Surface (sq ft / m2)244 / 22.67
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)244 / 22.67
Evaporative Heating Surface/Cylinder Volume301.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation675
Same as above plus superheater percentage675
Same as above but substitute firebox area for grate area3075
Power L12727
Power MT644.14

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