4-6-4 Steam Locomotives in Australia

Class S-636/C30 (Locobase 2409)

Data from 2 Jan 1961 publicity handout from the NSW reproduced at [] . This source notes that some of the C30s on the North Shore line had 19" cylinders and 175-psi settings for more tractive power. See also "'Double-Ender' Tank Locomotive, New South Wales Government Railways", Locomotive Magazine, Volume X [10] (15 September 1904), p. 153; "Powerful Six-Wheeled-Coupled Suburban Locomotive for the New South Wales Government Railways", Practical Engineer, Volume 30 (18 November 1914), pp. 573-574; and "New South Wales C30 class locomotive" in Wikipedia at [], last accessed 19 January 2025. (Thanks to Alexander Blessing for his 4 January 2025 email providing the Practical Engineer link and singling out the correct valve gear, coal capacity, boiler pressure, and cylinder diameter.)

95 were built by Beyer, Peacock & Co as works numbers 4444-4478 in 1903; 5034-5038, 5084-5088, 5140-5409, 5140-5149 in 1908; and 5791-5820 in 1913.

50 at NSW's Everleigh shops. Like many of the NSW engines of this era, these had Belpaire fireboxes. Embodying the very essence of a British Edwardian-era locomotive design, the C30s sported tall, capped stacks (chimneys), outside motion, but inside link motion, small steam dome over the first coupled axle, safety valve sand over the the firebox and curved roof over the cab.,

Note the high weight and low drivers suitable for good traction and rapid acceleration in suburban commuter service, which they served beginning in 1903. Set to work hauling trains over difficult profiles on the Northern, North Shore and Illawarra lines, the class proved so valuable that they were not simply scrapped once Sydney's electrification project began in 1929.

Instead, the shops converted 77 of these to C30T 4-6-0 tender engines from 1928-1933 to replace older locomotives on county lines. Other lines both around Sydney and elsewhere made use of the class for decades. As late as 1961, the system still had 67 left in service. Until February 1967, notes Wikipedia, several locomotives "operated the daily passenger trains on extremely steep Unanderra to Moss Vale line."