New South Wales 19 class locomotive

New South Wales Z19 class

Class Z19 Locomotive in service

Type and origin Power type Steam Builder Beyer, Peacock & Co. Henry Vale and Company Build date 1877–1891 Total produced 80

Specifications Configuration 0-6-0 UIC class Cn Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 4 ft 0 in (1.219 m) Loco weight Original: 75,000 lb (34 t); Rebuilt: 84,000 lb (38 t) Fuel type Coal Firebox:  • Firegrate area Original: 14 sq ft (1.3 m2); Rebuilt: 18 sq ft (1.7 m2) Boiler pressure Original: 130 psi (0.90 MPa); Rebuilt: 150 psi (1.03 MPa) Heating surface Original: 1,275 sq ft (118.5 m2); Rebuilt: 1,320 sq ft (123 m2) Superheater None Cylinders Two, inside Cylinder size 18 in × 24 in (457 mm × 610 mm)

Performance figures Tractive effort Original: 17,900 lbf (79.6 kN); Rebuilt: 20,655 lbf (91.9 kN)

Career Operators New South Wales Government Railways Class A93 (Z19 from 1924) Disposition 4 preserved, 76 scrapped

The Z19 class (formally A.93 class) was a class of steam locomotive built for and operated by the New South Wales Government Railways of Australia.

By 1877 the main lines in New South Wales were nearing Tamworth, Wagga Wagga and Orange. The additional distances required an increase in motive power, especially as at that time, locomotives were changed after quite short journeys. They were only in service when manned by their regular crew.

Between 1877 and 1881, the initial order of 50 of these 0-6-0 wheel arrangement locomotives were delivered from Beyer, Peacock and Company. Between 1880 and 1891, Beyer, Peacock delivered a further nine and local manufacturer, Henry Vale and Company eighteen.

The load which these locomotives could haul over the Blue Mountains line was 128 tonnes at 11–13 km/h. William Thow, the then Locomotive Engineer of the South Australian Railways, was commissioned by the New South Wales Government in 1888 to enquire into the New South Wales Government Railways locomotives and rolling stock. He recommended modifications to this class as he considered them to be the best designed and proportioned of the locomotives then in service. This included Belpaire boilers and new cabs.

Following the reclassification of locomotives in 1891, three additional similar locomotives were added to the class. With the arrival of the T class saw the class relegated to secondary roles and coal services in Newcastle. Between April 1902 and February 1910, fourteen were converted to 20 class 2-6-4 tank engines at Eveleigh Railway Workshops. By 1933 many had been withdrawn, with only 36 remaining in service.