Data from Howell, Comparative Statistics of the Australasian Railways, Journal of the Royal Statistical Society, March 1899, pp. 96-97. Builders were Beyer, Peacock and Dubs & Co.
These were the first class on the WAGR to be built in significant numbers, but they soon proved too small and light for mainline traffic. When the G class were introduced in the mid-1890s, the As were moved to branch-line service. In that role, most of the locomotives operated well into the post-World War II era.
Data from Howell, Comparative Statistics of the Australasian Railways, Journal of the Royal Statistical Society, March 1899, pp. 96-97. Builders were Beyer, Peacock (7 built), Neilson & Co (12 built), and J Martin & Co (29 built).
[], last accessed 6 September 2008, says that these were part of a "Australian Standard" and were widely used. But, "The G class seems to have satisfied the early need for a mainline general purpose locomotive, although they had a tendency to leave the track when running at high speed." Thus the design was modified to take a leading bogie in place of the Bissel truck; see Locobase 9563.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | A | G |
| Locobase ID | 9560 | 9562 |
| Railroad | Western Australia | Western Australia |
| Country | Australia | Australia |
| Whyte | 2-6-0 | 2-6-0 |
| Number in Class | 14 | 47 |
| Road Numbers | ||
| Gauge | 3'6" | 3'6" |
| Number Built | 14 | 47 |
| Builder | several | several |
| Year | 1885 | 1894 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | ||
| Engine Wheelbase (ft / m) | ||
| Ratio of driving wheelbase to overall engine wheelbase | ||
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | ||
| Engine Weight (lbs / kg) | 43,904 / 19,915 | 56,448 / 25,604 |
| Tender Loaded Weight (lbs / kg) | 24,080 / 10,923 | 37,586 / 17,049 |
| Total Engine and Tender Weight (lbs / kg) | 67,984 / 30,838 | 94,034 / 42,653 |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 | 1440 / 5.45 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.70 / 2 | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | ||
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 39 / 991 | 39 / 991 |
| Boiler Pressure (psi / kPa) | 130 / 900 | 140 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 20" / 305x508 | 14.5" x 20" / 368x508 |
| Tractive Effort (lbs / kg) | 8160 / 3701.32 | 12,831 / 5820.05 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | ||
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | ||
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | ||
| Firebox Area (sq ft / m2) | 54 / 5.02 | 72 / 6.69 |
| Grate Area (sq ft / m2) | 9.70 / 0.90 | 14.60 / 1.36 |
| Evaporative Heating Surface (sq ft / m2) | 550 / 51.12 | 780 / 72.49 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 550 / 51.12 | 780 / 72.49 |
| Evaporative Heating Surface/Cylinder Volume | 210.08 | 204.06 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1261 | 2044 |
| Same as above plus superheater percentage | 1261 | 2044 |
| Same as above but substitute firebox area for grate area | 7020 | 10,080 |
| Power L1 | 2647 | 2714 |
| Power MT | ||