New South Wales Z19 class locomotive

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New South Wales Z19 class
NSWGR Class Z19 Locomotive.jpg
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 classification Cn
Gauge 4 ft 8 12 in (1,435 mm)
Driver diameter 4 ft 0 in (1.219 m)
Locomotive weight Original: 75,000 lb (34 t);
Rebuilt: 84,000 lb (38 t)
Fuel type Coal
Boiler pressure Original: 130 psi (0.90 MPa);
Rebuilt: 150 psi (1.03 MPa)
Firegrate area Original: 14 sq ft (1.3 m2);
Rebuilt: 18 sq ft (1.7 m2)
Heating surface:
– Total
Original: 1,275 sq ft (118.5 m2);
Rebuilt: 1,320 sq ft (123 m2)
Superheater type 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
Operator(s) 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.[1]

History[edit]

Class Z19 (A93) locomotive being delivered at Pyrmont

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.[2]

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.[2][3]

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.[4] 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.[3]

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.[5]

Having a short wheelbase and no leading bogie, the locomotives had a tendency to derail and they were ultimately restricted to a maximum speed of 40 km/h and relegated to shunting and branch line traffic. Driven slowly, they could negotiate the most appalling curves and badly maintained or unballasted tracks. They were therefore ideal in goods yards, such as Darling Harbour and Port Waratah with the last two withdrawn from the latter in August 1972. Branch lines such as those to Dorrigo, Batlow and Oberon where grades of up to 1 in 25 (4%) and curves as sharp as 100 metres (328 ft) radius could be encountered were ideal for this class and these were the only locomotives permitted on these lines until dieselisation.[3][5]

Preservation[edit]

Four locomotives of the class have been preserved:

Preserved Z19 Class Locomotives
No. Description Manufacturer Year Current Organisation Location Status Ref
1904 0-6-0 Goods Beyer, Peacock and Company 1877 Dorrigo Steam Railway and Museum Dorrigo stored
1905 0-6-0 Goods Beyer, Peacock and Company 1877 NSW Rail Transport Museum Thirlmere static exhibit NSW Locomotive, Steam 1905
1919 0-6-0 Goods Beyer, Peacock and Company 1878 Glenreagh Mountain Railway Glenreagh operational Steam Locomotive 1919
1923 0-6-0 Goods Beyer, Peacock and Company 1879 Dorrigo Steam Railway and Museum Dorrigo stored

References[edit]

1909 on a short goods train passing Broadmeadow
  1. ^ New South Wales Railways 1855-1955. Published by Department of Railways
  2. ^ a b Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 46–52. ISBN 0 909650 27 6. 
  3. ^ a b c Preston, Ron G (1984). Tender into Tank. Sydney: New South Wales Rail Transport Museum. pp. 99–150. ISBN 0 909862 18 4. 
  4. ^ Thow, William (1842 - 1926)
  5. ^ a b Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. p. 36. ISBN 0 730100 05 7.