New South Wales Z23 class locomotive

4 ft 8+1⁄2 in (1,435 mm) standard gauge^[1]Driver dia.5 ft 1 in (1,549 mm)^[1]Total weight90.37 long tons
(101.21 short tons; 91.82 t)^[1]Firebox: • Grate area27.7 sq ft (2.57 m²)^[1]Boiler pressure160 psi (1,100 kPa) ^[1]Cylinder size21 in × 24 in
(533 mm × 610 mm)^[1]

Performance figures
Tractive effort	22,209 lbf (98.79 kN)^[1]

Career
Withdrawn	1933-1946
Disposition	All scrapped

The Z23 class (formerly O.446 class) was a class of steam locomotives built in 1891 for the New South Wales Government Railways in Australia.^[2]^[3]^[4]

Royal Commission

Although this may have been the result of a contemporary anti-American bias, these locomotives were said to be too heavy and too wide at the cylinders, and were the subject of a Royal Commission.^[5]

Withdrawal

2305 was the first withdrawn in May 1933. By 1941, only six were left, with the last, 2304, being withdrawn in September 1946.^[1] None has survived onto preservation.

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Oberg, Leon (1975). Locomotives of Australia. p. 73. ISBN 0-589-07173-4.
^ Preston, Ron G (1984). Tender into Tank. Sydney: New South Wales Rail Transport Museum. pp. 11–57. ISBN 0-909862-18-4.
^ 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.
^ New South Wales Railways 1855-1955. Published by Department of Railways
^ "BALDWIN ENGINE COMMISSION". The Sydney Morning Herald. National Library of Australia. 26 May 1892. p. 6. Retrieved 27 October 2014.