Little Orme Quarry 0-4-2 Locomotives in Great_Britain

Class Details by Steve Llanso of Sweat House Media

Class Garth (Locobase 4877)

Data from Kerr, Stuart & Company's own web page at []; and A R Bennett, "Locomotives of the Little Orme Quarry, Llandudno", Locomotive Magazine, Volume XXIII [23] (15 September 1917), p. 185-186. Works numbers included 1257 in 1914.

This was the one of the Brazil design offered by this Stoke City builder, a behemoth among the line of standard designs for industrial locomotives featured by Kerr, Stuart in its 1924 catalogue. This one was suitable for light rail (25-30 lb per yard) and for any gauge between 2' and standard.. See Wren for full description.

The specific locomotives were the modern power for this Welsh site of "extensive limestone quarries which for many years have been making the huge mass of Little Orme Head a diminishing quantity." Bennett characterized the Brazils as "smart little machines and move satisfactory loads over many sorts of curves and gradients."

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4877
RailroadLittle Orme Quarry
CountryGreat Britain
Number in Class2
Road Numbers
Number Built2
BuilderKerr, Stuart & Co
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.75 / 1.14
Engine Wheelbase (ft / m)9
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)9
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)28,560 / 12,955
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)28,560 / 12,955
Tender Water Capacity (gals / ML)324 / 1.23
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)30 / 762
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)9" x 15" / 229x381
Tractive Effort (lbs / kg)5508 / 2498.39
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)70 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)34.40 / 3.20
Grate Area (sq ft / m2) 5.42 / 0.50
Evaporative Heating Surface (sq ft / m2)252 / 23.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)252 / 23.42
Evaporative Heating Surface/Cylinder Volume228.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation867
Same as above plus superheater percentage867
Same as above but substitute firebox area for grate area5504
Power L13071
Power MT

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