New South Wales Z24 class locomotive

New South Wales Z24 class
Class Z24 Locomotive
Type and origin
Power type Steam
Builder Dübs and Company
Build date 1889
Total produced 25
Specifications
Configuration:
 ​
 • Whyte 2-6-0
 • UIC 1'Cn
Gauge 4 ft 8 1⁄2 in (1,435 mm)
Driver dia. 4 ft 0 in (1.219 m)
Adhesive weight 84,000 lb (38 t)
Loco weight 104,000 lb (47 t)
Firebox:
 • Firegrate area		 21 sq ft (2.0 m2)
Boiler pressure 140 psi (1.0 MPa)
Heating surface 1,410 sq ft (131 m2)
Superheater None
Cylinders Two, outside
Cylinder size 18 in × 26 in (457 mm × 660 mm)
Performance figures
Tractive effort 20,855 lbf (92.77 kN)
Factor of adh. 4.00
Career
Operators New South Wales Government Railways
Class B55, Z24 from 1924
Numbers 55-78, 388-393, 407-410
(2401-2425 from 1924)
Retired 1929–1960
Disposition 4 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 and Company for the New South Wales Government Railways of Australia.[1][2][3]

Order

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 and 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.[4][5]

Operation

They took a generally unobtrusive part in main line goods traffic until displaced by the T524/TF939/K1353 class locomotives. They then moved on to branch lines until displaced by the C30T class locomotives which arrived in the mid-1920s.

Demise and preservation

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 Region collieries.

The last locomotive withdrawn was 2413 in November 1960, following an enthusiast tour to Richmond.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.[4]

Preserved Z24 Class Locomotives
24082-6-0 goodsDübs and Company1891Dorrigo Steam Railway and MuseumDorrigostored
24132-6-0 goodsDübs and Company1891Canberra Railway MuseumJuneestored
24142-6-0 goodsDübs and Company1891Dorrigo Steam Railway and MuseumDorrigostored
24192-6-0 goodsDübs and Company1891Goulburn Locomotive Roundhouse MuseumGoulburnstatic exhibit NSW Locomotive, Steam 2419

References

Bunnerong Power Station No7, formerly 2408
  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. 1 2 Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. p. 65. ISBN 0 730100 05 7.
  5. ↑ Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 94–95. ISBN 0 909650 27 6.
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