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New South Wales Z24 class locomotive

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New South Wales Z24 class
Class Z24 Locomotive
Type and origin
Power typeSteam
BuilderDübs & Company
Build date1889
Total produced25
Specifications
Configuration:
​
 • Whyte2-6-0
 • UIC1'Cn
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 0 in (1,219 mm)
Adhesive weight84,000 lb (38,102 kg)
Loco weight104,000 lb (47,174 kg)
Firebox:​
 • Grate area21 sq ft (2.0 m2)
Boiler pressure140 psi (965 kPa)
Heating surface1,410 sq ft (131 m2)
SuperheaterNone
Cylinders2 outside
Cylinder size18 in × 26 in (457 mm × 660 mm)
Performance figures
Tractive effort20,855 lbf (92.77 kN)
Factor of adh.4.00
Career
OperatorsNew South Wales Government Railways
ClassB55, Z24 from 1924
Numbers55-78, 388-393, 407-410
(2401-2425 from 1924)
Retired1929–1960
Disposition4 preserved, 21 scrapped

The Z24 class (formerly B55 class) was a two-cylinder, non-condensing, saturated 2-6-0 ‘ Mogul‘ type steam engine built by Dübs & Company for the New South Wales Government Railways of Australia.

Order

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Following the success of the B205 class, in 1889 the New South Wales Government Railways ordered an additional 25 locomotives of a basically similar design from Dübs & Company. These locomotives had a deeper firebox, steel cab and weighed an extra nine tonnes. They were pooled with the B205 class in general working. The first locomotive entered traffic on 10 March 1891 and all were in service by August that year.[1][2]

Operation

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They took a generally unobtrusive part in main line goods traffic until displaced by the D50/D53/D55 class locomotives. They then moved on to branch lines until displaced by the C30T class locomotives which arrived in the mid-1920s.[2]

Demise and preservation

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As boiler renewals became due between 1929 and 1960, their numbers were depleted through either scrapping or disposal. Representatives found their way on to the private lines of such organisations as Bunnerong Power Station, Nepean Sand & Gravel at North Richmond and Hunter Valley collieries.[2]

The last locomotive withdrawn was 2413 in November 1960, following an enthusiast tour to Richmond. It joined 2408 and 2414 at Bunnerong Power Station until 1975.[1]

Preserved Z24 class locomotives
No. Year Current organisation Location Status Ref
2408 1891 Dorrigo Steam Railway & Museum Dorrigo Stored
2413 1891 Junee Roundhouse Railway Museum Junee Roundhouse Railway Museum Static display
2414 1891 Dorrigo Steam Railway & Museum Dorrigo Stored
2419 1891 Transport Heritage NSW Goulburn Rail Heritage Centre static display [3]

References

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Bunnerong Power Station No7, formerly 2408
  1. ^ a b Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. p. 65. ISBN 0-730100-05-7.
  2. ^ a b c Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society. pp. 94–95. ISBN 0-909650-27-6.
  3. ^ Locomotive, Steam 2419 Office of Environment & Heritage
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Media related to New South Wales Z24 class locomotives at Wikimedia Commons

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