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500-class 4-8-2 (later 500B-class 4-8-4) locomotives.
| Class: | 500 | 500B | |
| Builder: | Sir W G Armstrong Whitworth - Newcastle on Tyne, England | ||
| Wheel arrangement: | 4-8-2 (2′D1′ 2′2′) | 4-8-4 (2′D2′ 2′2′) | |
| Year: | 1926 | 1929 | |
| Number built: | 10 | 10 | |
| Drivingwheels diameter: | 63 in. | 63 in. | |
| Cylinders: No., diameter & stroke: | 2 x 26 in. x 28 in. | 2 x 26 in. x 28 in. | |
| Valve gear: | Walschaert | Walschaert | |
| Boiler pressure: | 200 lbs. | 200 lbs. | |
| Tractive effort - engine: | 51,000 lbs. | 59,000 lbs. | |
| booster: | - | 8,000 lbs | |
| Heating surfaces - tubes: | 3,253 sq. ft. | 3,253 sq. ft. | |
| superheater: | 835 sq. ft. | 835 sq. ft. | |
| firebox: | 395 sq. ft. | 395 sq. ft. | |
| grate area: | 66.6 sq. ft. | 66.6 sq. ft. | |
| Tender capacity - coal: | 12 tons | 11 tons | |
| Water | 8,300 callons (Water capacity reduced to 7,100 gallons in 1930) | 7,000 gallons | |
| Roadworthy weights - engine : | 135.80 tons | 243.80 tons | |
| tender | 85.15 tons | 78.80 tons | |
| on drivers | 88.85 tons | 87.20 tons | |
| engine & tender: | 218 ton 13 cwt | 222 ton 6 cwt | |
| Maximum axle load: | 22 ton 7 cwt 2 qtr | 22 ton 3cwt | |
| Wheelbases - engine | 39 ft. 2 in. | 39 ft. 2 in. | |
| rigid | 17 ft. 0 in. | 17 ft. 0 in. | |
| engine & tender | 73 ft. 11 in. | 73 ft. 11' | |
| Overall length: | 83 ft. 11 in. | 84 ft. 2 in. | |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 4.6.1926 | Entered service. Works No.633 |
| 9.1928 | Named James McGuire |
| 20.9.1929 | Rebuilt with booster to 4-8-4 wheel configuration |
| 26.8.1937 | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 11.5.1963 | Last run on special to Angaston. |
| 12.5.1963 | WithDrawn |
| 12.2.1965 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 2.7.1926 | Entered service. Works No.634 |
| 27.9.1926 | First "500 class" on "Melbourne Express". |
| 1927 | Named Sir Henry Barwell |
| 10.4.1930 | Rebuilt with booster to 4-8-4 wheel configuration |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 26.3.1958 | WithDrawn |
| 25.11.1958 | Boiler sold to "Jon Products" of Challa Gardens S.A. |
| 29.3.1961 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 22.5.1926 | Entered service. Works No.635 |
| - | Named John Gunn |
| 8.6.1929 | Rebuilt with booster to 4-8-4 wheel configuration |
| 6.7.1961 | WithDrawn |
| 25.8.1962 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 23.7.1926 | Entered service. Works No.636 |
| - | Named R. L. Butler |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 9.10.1936 | Rebuilt with booster to 4-8-4 wheel configuration |
| 9.7.1962 | WithDrawn |
| 16.2.1963 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 18.10.1926 | Entered service. Works No.637 |
| - | Named Tom Barr Smith |
| 23.8.1929 | Rebuilt with booster to 4-8-4 wheel configuration |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 9.7.1962 | WithDrawn |
| 23.7.1965 | Presented to the Mile End Railway Museum |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 28.10.1926 | Entered service. Works No.638 |
| - | Named Sir Tom Bridges |
| 19.8.1930 | Rebuilt with booster to 4-8-4 wheel configuration |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 9.7.1962 | WithDrawn |
| 29.4.1963 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 25.10.1926 | Entered service. Works No.639 |
| - | Named Sir George Murray |
| 16.7.1929 | Rebuilt with booster to 4-8-4 wheel configuration |
| 9.6.1959 | WithDrawn |
| 20.7.1962 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 12.10.1926 | Entered service. Works No.640 |
| - | Named Margaret Murray |
| 4.4.1927 | Used on "Royal Train." |
| 17.4.1929 | Rebuilt with booster to 4-8-4 wheel configuration |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 26.3.1958 | WithDrawn |
| 17.9.1962 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 14.9.1926 | Entered service. Works No.641 |
| 10.1928 | Named Sir Lancelot Stirling |
| 27.12.1929 | Derailed with "Melbourne Express". |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 13.11.1936 | Rebuilt with booster to 4-8-4 wheel configuration |
| 9.7.1962 | WithDrawn |
| 26.11.1962 | Scrapped |
Sir W G Armstrong Whitworth 4-8-2 type broad gauge steam locomotive.
| 24.8.1926 | Entered service. Works No.642 |
| 18.7.1930 | Named W. A. Webb |
| 18.7.1930 | Rebuilt with booster to 4-8-4 wheel configuration |
| Mid 1930s | Semi-stramlined vaguely after the style of Southern Pacific's GS4-class 4-8-4s |
| 6.7.1961 | WithDrawn |
| 8.10.1962 | Scrapped |
