New South Wales Z23 class locomotive

New South Wales Z23 Class
O.446 Class Locomotive
Type and origin Power type Steam Builder Baldwin Locomotive Works Build date 1891 Total produced 12
Specifications Configuration: ​  • Whyte 4-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 5 ft 1 in (1,549 mm) Total weight 90.37 long tons (101.21 short tons; 91.82 t) Firebox: ​  • Grate area 27.7 sq ft (2.57 m2) Boiler pressure 160 psi (1,100 kPa) Cylinder size 21 in × 24 in (533 mm × 610 mm)
Performance figures Tractive effort 22,209 lbf (98.79 kN)
Career Withdrawn 1933-1946 Disposition All scrapped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.

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.

Withdrawal

2305 was the first withdrawn in May 1933. By 1941, only six were left, with the last, 2304, being withdrawn in September 1946.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

See also

• NSWGR steam locomotive classification