New South Wales Z27 class locomotive

New South Wales Z27 class locomotive
New South Wales Z27 class
2705 on an enthusiast special along the Metropolitan Goods Line at Dulwich Hill on 20 November 1965
Power type Steam
Builder Hunslet Engine Company
Build date 1913
Total produced 8
Configuration 2-6-0
UIC classification 1′Cn
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver diameter 4 ft ½ 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 & tender
combined weight		 80 tons 7 cwt (180,000 lb or 81.6 t)
Fuel type Coal
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)
Heating surface:
Total		 1,240 sq ft (115 m2)
Superheater type None
Cylinders Two, outside
Cylinder size 18 × 24 in (457 × 610 mm)
Valve gear Walschaerts
Valve type Slide valves
Tractive effort New: 20,660 lbf (91.9 kN),
Dec. 1921: 19,240 lbf (85.6 kN)
Factor of
adhesion		 New: 3.97,
Dec. 1921: 4.24
Career New South Wales Public Works Department;
New South Wales Government Railways
Class G1204; Z27 from 1924
Number 1204–1211; 2701–2708 from 1924
Retired 1957–1966
Disposition One preserved, remainder scrapped.

The Z27 class is a class of steam locomotive built for and operated by the New South Wales Government Railways of Australia.

History

These eight small 'Mogul' type locomotives were built by the Hunslet Engine Company of Leeds, England, in 1913 for the Public Works Department as railway construction locomotives, working on such lines as Coffs Harbour to Glenreagh, Glenreagh to Dorrigo and Humula to Tumbarumba.

When the New South Wales Government Railways became the constructing authority in 1917, these locomotives were taken over and received the road numbers 1204-1211 of the (G)1204-class. These locomotives were considered too modern to be utilised on construction work and were soon 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 anthing 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 such places as Moree, Pokataroo, Walgett, Mungindi and Boggabilla.

The mid-1950s saw the withdrawal of two of the class and a further four went in 1963. 2707 was the last to go in 1966, leaving 2705 to be retained by the New South Wales Rail Transport Museum.

References

v · d · eSydney and New South Wales Rail Rollingstock
NSWGR steam locomotive
X10 class • Z11 class • Z12 class • Z13 class • Z14 class • Z15 class • Z16 class • Z17 class • Z18 class • Z19 class • Z20 class • Z21 class • Z23 class • Z24 class • Z25 class • Z26 class • Z27 class (2705) • Z28 class • Z29 class • C30 class (3112) • C30T class (3016T) • C32 class (3237) (3265) • C34 class • C35 class (3526) • C36 class (3642) • C38 class (3801) (3820) (3830) • D50 class • D53 class • D55 class • D57 class • D58 class • D59 class (5917) • AD60 class
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