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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]

New South Wales Z23 Class
O.446 Class Locomotive
Type and origin Power type Steam Builder Baldwin Locomotive Works[1] Total produced 12[1]
Specifications Configuration: ​  • Whyte 4-6-0[1] Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge[1] Driver dia. 5 ft 1 in (1,549 mm)[1] Total weight 90.37 long tons (101.21 short tons; 91.82 t)[1] Firebox:  • Firegrate area 27.7 sq ft (2.57 m2)[1] Boiler pressure 160 psi (1,100 kPa) [1] Cylinder size 21 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Career Withdrawn 1933-1946 Disposition All scrapped

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2305 was the first withdrawn in May 1933. By 1941, only six were left, with the last, 2304, being withdrawn in September 1946.[1] None has survived onto preservation.

See also

• NSWGR steam locomotive classification

References

Wikimedia Commons has media related to New South Wales Z23 class locomotives.

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