New South Wales Z17 class locomotive

New South Wales Z17 class

300px Class Z17 Locomotive in service

Type and origin Power type Steam Builder Vulcan Foundry Serial number 1164–1175 Build date 1886 Total produced 12

Specifications Configuration 4-4-0 UIC class 2'Bn Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver diameter 5 ft 6 in (1.676 m) Adhesive weight 64,000 lb (29 t) Loco weight Water cap 2,500 imp gal (11,000 L; 3,000 US gal) Boiler pressure 140 psi (970 kPa) Firegrate area 20 sq ft (1.9 m2) Heating surface 1,285 sq ft (119.4 m2) Superheater None Cylinders Two Cylinder size 19 in × 26 in (483 mm × 660 mm) Train brakes air

Performance figures Tractive effort 16,920 lbf (75.3 kN)

Career Operators New South Wales Government Railways Class H373 (Z17 from 1924) Numbers H373-H384 (1701-1712 from 1924) Retired 1934–1974 Disposition 1 preserved, 11 scrapped

The 17 class (formally H.373 class) was a class of steam locomotive built by the Vulcan Foundry for the New South Wales Government Railways of Australia.

History

Ordered from the Vulcan Foundry 12 were placed in service in 1887. They had the 4-4-0 wheel arrangement that most locomotives had at the time. Shortly after delivery the class leader was tested against the Baldwin Locomotive Works built L304 class to see which one could make a faster and better run across the Blue Mountains to Eskbank,with the Baldwin locomotive judged superior. They were also intended to haul passenger service on the steeply graded Sydney to Newcastle and Kiama lines.

They proved unpopular with both locomotive crews because of rough riding and track maintenance staff because of their high axle load and were displaced from mainline working and relegated to branch line work following the arrival of the P6 class. In 1905/06, new boilers with Belpaire fireboxes were fitted, the smokeboxes shortened and the cylinder diameter reduced. In 1924 the class was renumbered becoming the Z17 class.

Demise and Preservation

As they became due for reboilering they began to be withdrawn from January 1934 with only four in service by 1948.

Preserved Z17 Class Locomotives
No.	Description	Manufacturer	Year	Current Organisation	Location	Status	Ref
1709	4-4-0 Passenger	Vulcan Foundry	1887	New South Wales Rail Transport Museum	Thirlmere	operational

See also

• NSWGR steam locomotive classification

Further reading

• Full Steam across the Mountains by Phil Belpin