New South Wales Z27 class locomotive

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New South Wales Z27 class
NSWGR Class Z27 Locomotive.jpg
Class Z27 Locomotive
Type and origin
Power typeSteam
Builder Hunslet Engine Company
Build date1913
Total produced8
Specifications
Configuration:
​
 •  Whyte 2-6-0
 •  UIC 1′Cn
Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 0+1⁄2 in (1,232 mm)
Length54 ft 4+7⁄8 in (16.58 m)
Axle load 12 long tons 15 cwt (28,600 lb or 13 t)
Adhesive weight 36 long tons 8 cwt (81,500 lb or 37 t)
Loco weight45 long tons 2 cwt (101,000 lb or 45.8 t)
Total weight80 long tons 7 cwt (180,000 lb or 81.6 t)
Fuel type Coal
Fuel capacityNew: 5 long tons 10 cwt (12,300 lb or 5.6 t)
Water cap.New: 2,150 imperial gallons (9,800 L; 2,580 US gal)
Firebox:​
 • Grate area21 sq ft (2.0 m2)
Boiler pressureNew: 160 psi (1.10 MPa),
Dec. 1921: 150 psi (1.03 MPa)
Heating surface1,240 sq ft (115 m2)
SuperheaterNone
Cylinders Two, outside
Cylinder size 18 in × 24 in (457 mm × 610 mm)
Valve gear Walschaerts
Valve type Slide valves
Performance figures
Tractive effort New: 20,660 lbf (91.9 kN),
Dec. 1921: 19,240 lbf (85.6 kN)
Factor of adh. New: 3.97,
Dec. 1921: 4.24
Career
OperatorsNew South Wales Public Works Department
New South Wales Government Railways
Class G1204, Z27 from 1924
NumbersPWD1-PWD8, 1204–1211, (2701–2708 from 1924)
Retired1957–1966
Disposition1 preserved, 7 scrapped

The Z27 class (formerly G.1204 class) was a class of steam locomotives built by Hunslet Engine Company for the New South Wales Government Railways of Australia. [1] [2] [3]

Contents

History

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 the Tumbarumba railway line between Humula and Tumbarumba. [4]

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.

Preservation

The first two withdrawals occurred in 1957, a further four followed in 1963.

Preserved Z27 class locomotives
No.DescriptionManufacturerYearOrganisationLocationStatusRef
2705 2-6-0 Mixed TrafficHunslet Engine Company1913 Transport Heritage NSW Thirlmere operational

[5]

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References

  1. ↑ Preston, Ron G (1984). Tender into Tank. Sydney: New South Wales Rail Transport Museum. pp. 11–57. ISBN   0 909862 18 4.
  2. ↑ 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.
  3. ↑ New South Wales Railways 1855-1955. Published by Department of Railways
  4. ↑ Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 165–166. ISBN   0 909650 27 6.
  5. ↑ Locomotive, Steam 2705 Department of Environment & Heritage
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