New South Wales Z20 class
2029 at theNSW Rail Museum,Thirlmere
Type and origin Power type Steam Builder Beyer, Peacock & Company (12, new) Serial number BP 3202–3207, 3289–3294 (new) Build date 1890–1891 (new) Total produced 19 new, 14 rebuilt fromZ19 class
Specifications Configuration: ​  • Whyte 2-6-4T Gauge 1,435 mm (4 ft 8+1⁄2 in)standard gauge Driver dia. 4 ft 0 in (1,219 mm) Adhesive weight E(10): 77,000 lb (34,927 kg); A/E: 84,000 lb (38,102 kg) Loco weight E(10): 126,000 lb (57,153 kg); A/E: 137,000 lb (62,142 kg) Fuel type Coal Firebox: ​  • Grate area 18 sq ft (1.7 m2) Boiler pressure 150 psi (1.03 MPa) Heating surface E(10): 1,380 sq ft (128 m2); A/E: 1,320 sq ft (123 m2) Superheater None Cylinders 2 Cylinder size 18 in × 24 in (457 mm × 610 mm)
Performance figures Tractive effort 20,655 lbf (91.9 kN)
Career Operators New South Wales Government Railways Class New: E(10),rebuilds: A/E; both later Z20 Preserved 2029 Disposition 1 preserved, 32 scrapped

TheNew South Wales Z20 class is a class of2-6-4Tsteam locomotives operated by theNew South Wales Government Railways of Australia.

There was a total of 33 members of this class of2-6-4T mixed traffic side tank locomotives. There were three differing types.

Twelve were classified E(10) class under the pre-1924 recording. These locomotives were built byBeyer, Peacock & Company and delivered in 1891 for use onNewcastle coal traffic. They proved very successful in suburban goods and coal traffic, picnic trains toToronto, but were unsuited to main line passenger traffic. When displaced by more powerful locomotives, many were used as shunters. Their final services were on short light branch lines, such asKurrajong,Carlingford,Camden,Rogans Hill andMorpeth. A number were also to be found shunting the industrial sidings atPort Kembla.^[1][2]

In 1902, there was a shortage of tank locomotives. Six members of theA(93) class 0-6-0 tender engines were converted to a new A/E class tank locomotives byEveleigh Railway Workshops. A further eight conversions were made in 1909/10. In 1911, seven new locomotives were constructed at Eveleigh. As part of the1924 reclassification scheme, these 21 locomotives were grouped with the twelve E(10) class to form the (Z)20-class.^[3][4]

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As more tender locomotives became available for suburban goods traffic, the surplus locomotives of the combined class were scrapped or sold. Some of the locomotives which were sold to industrial interests include:

• 2002 to thePublic Works Department as PWD80
• 2003, 2004 and 2012 toAustralian Iron & Steel,Port Kembla asWonga,Wallaroo &Wombat
• 2008 to the Electrolytic Refining & Smelting Company, Port Kembla
• 2013 toWidemere Quarry,Fairfield resold toJ & A Brown Abermain Seaham Collieries,Hexham
• 2017 and 2020 to Hebburn Collieries, Weston
• 2014 toBunnerong Power Station
• 2018 to Southern Portland Cement
• 2031 toBulli Colliery

The last member of the class in service with theNew South Wales Government Railways was 2029 which had been retained for working theHolsworthy railway line. It has been preserved by theNSW Rail Museum,Thirlmere and cosmetically restored.^[5]

• Beyer, Peacock locomotives
• Railway locomotives introduced in 1891
• Steam locomotives of New South Wales
• Standard-gauge locomotives of Australia
• 2-6-4T locomotives
• 1′C2′ n2t locomotives

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