Silverton Tramway 4-6-0 Locomotives in Australia
Class Details by Steve Llanso of Sweat House Media
Class A (Locobase 7523)
Data from 1946 Beyer, Peacock catalogue hosted on Martyn Bane's website at [
] (accessed 21 May 2006). See also "Australian 3 ft, 6 in gauge locomotives", The Locomotive Magazine, Volume 28 (15 August 1922),p. 222. Batch #0882, works numbers 5912-5913.) (Production data from The Beyer, Peacock production list -- [], last accessed 29 May 2006).
These engines ran on a private railroad established to bridge the political gap created when the states of New South Wales and South Australia couldn't agree on which of their railways should operate over their joint border. The main line - which opened in 1888 - ran 56 km (35 miles) from Broken Hill & Silverton in NSW to Cockburn in South Australia.
Beyer's modestly scaled Tenwheelers presented a classically British profile and had saturated boilers and Belpaire fireboxes.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | A |
| Locobase ID | 7523 |
| Railroad | Silverton Tramway |
| Country | Australia |
| Whyte | 4-6-0 |
| Number in Class | 4 |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | 4 |
| Builder | Beyer, Peacock |
| Year | 1915 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 19.50 / 5.94 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 38.42 / 11.71 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 21,056 / 9551 |
| Weight on Drivers (lbs / kg) | 62,048 / 28,145 |
| Engine Weight (lbs / kg) | 84,000 / 38,102 |
| Tender Loaded Weight (lbs / kg) | 51,744 / 23,471 |
| Total Engine and Tender Weight (lbs / kg) | 135,744 / 61,573 |
| Tender Water Capacity (gals / ML) | 2760 / 10.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 130 / 492 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51 / 1295 |
| Boiler Pressure (psi / kPa) | 188.50 / 1300 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.5" x 22" / 419x559 |
| Tractive Effort (lbs / kg) | 18,817 / 8535.26 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.30 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 185 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.75 / 3.28 |
| Firebox Area (sq ft / m2) | 97.50 / 9.06 |
| Grate Area (sq ft / m2) | 17 / 1.58 |
| Evaporative Heating Surface (sq ft / m2) | 1011 / 93.96 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1011 / 93.96 |
| Evaporative Heating Surface/Cylinder Volume | 185.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3205 |
| Same as above plus superheater percentage | 3205 |
| Same as above but substitute firebox area for grate area | 18,379 |
| Power L1 | 4410 |
| Power MT | 470.07 |