New South Wales Z27 class locomotive
|New South Wales Z27 class|
Class Z27 Locomotive
|Builder||Hunslet Engine Company|
|Gauge||4 ft 8 1⁄2 in (1,435 mm)|
|Driver diameter||4 ft 0 1⁄2 in (1.232 m)|
|Length||54 ft 4 7⁄8 in (16.58 m)|
|Axle load||12 tons 15 cwt (28,600 lb or 13.0 t)|
|Weight on drivers||36 tons 8 cwt (81,500 lb or 37.0 t)|
|Locomotive weight||45 tons 2 cwt (101,000 lb or 45.8 t)|
|Locomotive and tender
|80 tons 7 cwt (180,000 lb or 81.6 t)|
|Fuel capacity||New: 5 tons 10 cwt (12,300 lb or 5.6 t)|
|Water capacity||New: 2,150 imperial gallons (9,800 l; 2,580 US gal)|
|Boiler pressure||New: 160 psi (1.10 MPa),
Dec. 1921: 150 psi (1.03 MPa)
|Firegrate area||21 sq ft (2.0 m2)|
|1,240 sq ft (115 m2)|
|Cylinder size||18 in × 24 in (457 mm × 610 mm)|
|Valve type||Slide valves|
|Tractive effort||New: 20,660 lbf (91.9 kN),
Dec. 1921: 19,240 lbf (85.6 kN)
Dec. 1921: 4.24
|Railroad(s)||New South Wales Public Works Department
New South Wales Government Railways
|Class||G1204, Z27 from 1924|
|Number||PWD1-PWD8, 1204–1211, (2701–2708 from 1924)|
|Disposition||1 preserved, 7 scrapped|
Eight 'Mogul' type locomotives were built in 1913 for the New South Wales Public Works Department as railway construction locomotives, working on lines such as Coffs Harbour to Glenreagh, Glenreagh to Dorrigo and Humula to Tumbarumba.
When the New South Wales Government Railways assumed responsibility for railway construction in 1917, these locomotives were transferred and became the (G)1204 class. These locomotives were considered too modern to be utilised on construction work and were transferred to more demanding duties. However they were found to be unsuitable for working lines which abounded in curves, having a tendency to shed their valve motion on anything other than the straightest of track. They were transferred to Narrabri West where they stayed for practically the whole of their remaining lives, working to Moree, Pokataroo, Walgett, Mungindi and Boggabilla.
The first two withdrawals occurred in 1957, a further four followed in 1963.
|Preserved Z27 Class Locomotives|
|2705||2-6-0 Mixed Traffic||Hunslet Engine Company||1913||New South Wales Rail Transport Museum||Thirlmere||operational|
- Preston, Ron G (1984). Tender into Tank. Sydney: New South Wales Rail Transport Museum. pp. 11–57. ISBN 0 909862 18 4.
- Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 41–45. ISBN 0 909650 27 6.
- New South Wales Railways 1855-1955. Published by Department of Railways
- Locomotive, Steam 2705 Department of Environment & Heritage