Data from "The Padarn Railway", The Locomotive Magazine, Volume XI [11] (16th January 1905), p. 13. Works numbers were 302, 410, and 631.
The Padarn connected the Dinorwic slate quarries at Llanberis in Wales with Port Dinworic 7 miles away. The quarries themselves were carved out of the mountain in terraces, each of which had its own narrow-gauge railway; they employed up to 3,000 men and boys.
The line locomotive stud included this trio from Hunslet: Dinorwic, Pandora (1886-(later Amalthaea), and Velinheli (1895), which had a tough alignment to work. The summit actually was in the middle of the line.
In 1909, Pandora was renamed Alamathea. The engines clearly suited their requirements as all three operated until scrapped in 1963. .
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | Dinworic |
Locobase ID | 10484 |
Railroad | Padarn |
Country | Great Britain |
Whyte | 0-6-0T |
Number in Class | 3 |
Road Numbers | |
Gauge | 4' |
Number Built | 3 |
Builder | Hunslet Engine Co |
Year | 1882 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 10 / 3.05 |
Engine Wheelbase (ft / m) | 10 / 3.05 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 10 / 3.05 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 56,000 / 25,401 |
Engine Weight (lbs / kg) | 56,000 / 25,401 |
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) | 31 / 15.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 42 / 1067 |
Boiler Pressure (psi / kPa) | 130 / 900 |
High Pressure Cylinders (dia x stroke) (in / mm) | 12.5" x 20" / 318x508 |
Tractive Effort (lbs / kg) | 8222 / 3729.44 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.81 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 119 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 8.42 / 2.57 |
Firebox Area (sq ft / m2) | 49 / 4.55 |
Grate Area (sq ft / m2) | 8 / 0.74 |
Evaporative Heating Surface (sq ft / m2) | 507 / 47.10 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 507 / 47.10 |
Evaporative Heating Surface/Cylinder Volume | 178.48 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1040 |
Same as above plus superheater percentage | 1040 |
Same as above but substitute firebox area for grate area | 6370 |
Power L1 | 2409 |
Power MT | 284.51 |