Data from "Dinorwic Alice Class" in Wikipedia at [], last accessed 2 December 2021. See also Mark Adlington originally at pws.prserv.net/mdsme/Hunslet/Alice_class.htm,, later [
], last accessed 2 Decmber 2021.
Mark Adlington in the Quarry Engines of North Wales website -- pws.prserv.net/mdsme/Hunslet/Mills_Tramroad_class.htm -- shows illustrations of the two surviving quarry locomotives of this Hunslet class. See also "The Padarn Railway", The Locomotive Magazine, Vol XI (16th January 1905), p. 13 and [], the Narrow-Gauge Railway Museum's website.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
---|---|---|
Class | Alice | Mills/Tramroad |
Locobase ID | 5983 | 5982 |
Railroad | Dinorwic Quarries | Dinorwic Quarries |
Country | Great Britain | Great Britain |
Whyte | 0-4-0ST | 0-4-0ST |
Number in Class | 11 | 2 |
Road Numbers | ||
Gauge | 60 cm | 60 cm |
Number Built | 11 | 2 |
Builder | Hunslet Engine Co | Hunslet Engine Co |
Year | 1886 | 1895 |
Valve Gear | ||
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 3.25 / 0.99 | 4.49 / 1.37 |
Engine Wheelbase (ft / m) | 3.25 / 0.99 | 4.49 / 1.37 |
Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 13,440 / 6096 | 26,321 / 11,939 |
Engine Weight (lbs / kg) | 13,440 / 6096 | 26,321 / 11,939 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 13,440 / 6096 | 26,321 / 11,939 |
Tender Water Capacity (gals / ML) | 120 / 0.45 | 264 / 1 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.08 / 0.10 | 0.20 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 11 / 5.50 | 22 / 11 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 20 / 508 | 26 / 660 |
Boiler Pressure (psi / kPa) | 140 / 9.70 | 140.70 / 9.70 |
High Pressure Cylinders (dia x stroke) (in / mm) | 7" x 10" / 178x254 | 8.5" x 14" / 216x356 |
Tractive Effort (lbs / kg) | 2916 / 1322.68 | 4653 / 2110.57 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.61 | 5.66 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 45 - 1.732" / 44 | |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | ||
Firebox Area (sq ft / m2) | 14 / 1.30 | 21.95 / 2.04 |
Grate Area (sq ft / m2) | 2.50 / 0.23 | 3.55 / 0.33 |
Evaporative Heating Surface (sq ft / m2) | 100 / 9.29 | 193 / 17.94 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 100 / 9.29 | 193 / 17.94 |
Evaporative Heating Surface/Cylinder Volume | 224.51 | 209.90 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 350 | 499 |
Same as above plus superheater percentage | 350 | 499 |
Same as above but substitute firebox area for grate area | 1960 | 3088 |
Power L1 | 1781 | 2008 |
Power MT | 584.29 | 336.38 |