New South Wales Z12 class locomotive

New South Wales Z12 class
Type and origin
Power typeSteam
BuilderBeyer, Peacock & Company (34)
Dübs & Company (26)
Atlas Engineering Works (8)
Build date1877–1882
Total produced68
Specifications
Configuration:
​
 • Whyte4-4-0
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.5 ft 6 in (1,676 mm)
Adhesive weight57,000–62,000 lb (25,900–28,100 kg)
Loco weight84,000–95,000 lb (38,100–43,100 kg)
Firebox:​
 • Grate area15 sq ft (1.4 m2)
Boiler pressure130 psi (896 kPa) as built;
140 psi (965 kPa) later
Heating surface1,070–1,120 sq ft (99–104 m2)
Cylinders2 outside
Cylinder size18 in × 24 in (457 mm × 610 mm)
Train brakesAir
Performance figures
Tractive effort13,019–14,020 lbf (57.9–62.4 kN)
Career
OperatorsNew South Wales Government Railways
NumbersAs built: 79-92, 118-126, 143-157, 165-182, 27N-30N, 37N-39N, 47N-51N
From 1924: 1201-1248
Preserved1210, 1219, 1243
Disposition20 rebuilt as Z13 class, 45 scrapped, 3 preserved

The New South Wales Z12 class is a class of 4-4-0 steam locomotives operated by the New South Wales Government Railways of Australia.

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