New South Wales D50 class locomotive

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New South Wales D50 class
NSWGR Class D50 Locomotive.jpg
Class D50 Locomotive
Power type Steam
Builder Beyer, Peacock & Co. (151)
Dübs & Co. (5)
Neilson & Co. (10)
North British Locomotive Co. (84)
Clyde (30)
Build date 1896–1916
Total produced 280
Configuration 2-8-0
UIC classification 1'Dn
Gauge 4 ft 8 12 in (1,435 mm)
Driver diameter 4 ft 3 in (1.295 m)
Weight on drivers 126,000 lb (57 t)
Locomotive weight 139,000 lb (63 t)
Boiler pressure 160 psi (1.10 MPa)
Firegrate area 30 sq ft (2.8 m2)
Heating surface:
– Total
2,210 sq ft (205 m2)
Superheater type None
Cylinders Two, outside
Cylinder size 21 in × 26 in (533 mm × 660 mm)
Tractive effort 30,576 lbf (136.0 kN)
Factor of
Railroad(s) New South Wales Government Railways
Class T524, D50 from 1924
Number in class 280
Disposition 4 preserved, 276 scrapped

The D50 class was a class of 2-8-0 steam locomotives built for the New South Wales Government Railways of Australia.


The first was delivered in May 1896 by Beyer, Peacock and Company with further orders over the next 20 years seeing the class number 280. Their second and third coupled wheel tyres were flangeless to reduce curve friction.[1][2]

During the First World War, an additional 10 locomotives of this class were under construction at the North British Locomotive Company, but these were not delivered to Australia, being taken over by the British War Office for the Royal Engineers Railway Operating Division. After the war, they were offered back to the New South Wales Government Railways at higher than new prices and in a badly worn condition. They were declined and were subsequently acquired by a Belgian railway and, following rebuilding, assigned to work coal trains along the Meuse Valley. The Commonwealth Railways also chose this design to be their first goods locomotive class, building eight K-class, for the Trans-Australian Railway.[2]

The last 75 were built with superheaters and after being judged a success many of the class were retrofitted. Many of the class received turret type tenders in later years which provided better visibility when operating in reverse.[2]

In the 1930s 72 were withdrawn and after being used during the load testing of the Sydney Harbour Bridge in 1932 with most scrapped, although 14 were rebuilt with superheaters and returned to service.[1] By mid-1964 there were only 113 left in service with the class by now normally restricted to working coal trains in the Hunter Valley and shunting duties in the larger marshalling yards throughout the system.[1][2]


Preserved D50 Class Locomotives
No. Description Manufacturer Year Current Organisation Location Status Ref
5069 2-8-0goods Beyer, Peacock and Company 1903 Dorrigo Steam Railway and Museum Dorrigo stored
5096 2-8-0 goods Clyde Engineering 1907 New South Wales Rail Transport Museum Broadmeadow Locomotive Depot stored NSW Locomotive, Steam 5096
5112 2-8-0 goods Clyde Engineering 1908 Bathurst Regional Council Bathurst Station static display
5132 2-8-0 goods Clyde Engineering 1909 Dorrigo Steam Railway and Museum Dorrigo stored


See also[edit]


  1. ^ a b c Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. pp. 76–77. ISBN 0 730100 05 7. 
  2. ^ a b c d Grunbach, Alex (1989). A Compendium of New South Wales Steam Locomotives. Sydney: Australian Railway Historical Society, NSW Division. pp. 129–135. ISBN 0 909650 27 6.