New South Wales Z27 class locomotive

New South Wales Z27 class
Class Z27 Locomotive
Type and origin
Power typeSteam
BuilderHunslet Engine Company
Build date1913
Total produced8
Specifications
Configuration:
​
 • Whyte2-6-0
 • UIC1′Cn
Gauge4 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 load12 long tons 15 cwt (28,600 lb or 13 t)
Adhesive weight36 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 typeCoal
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
CylindersTwo, outside
Cylinder size18 in × 24 in (457 mm × 610 mm)
Valve gearWalschaerts
Valve typeSlide valves
Performance figures
Tractive effortNew: 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
ClassG1204, 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]

  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