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 Middle Run Media | |
|---|---|
| Class | Garth |
| Locobase ID | 4877 |
| Railroad | Little Orme Quarry |
| Country | Great Britain |
| Whyte | 0-4-2ST |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 2 |
| Builder | Kerr, Stuart & Co |
| Year | 1914 |
| 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 / 1100 |
| 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 Volume | 228.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 867 |
| Same as above plus superheater percentage | 867 |
| Same as above but substitute firebox area for grate area | 5504 |
| Power L1 | 3071 |
| Power MT | |