New South Wales D50 class locomotive
Class D50 Locomotive
|Type and origin|
|Builder||Beyer, Peacock & Co. (151)
Dübs & Co. (5)
Neilson & Co. (10)
North British Locomotive Co. (84)
|Gauge||4 ft 8 1⁄2 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)|
|2,210 sq ft (205 m2)|
|Cylinder size||21 in × 26 in (533 mm × 660 mm)|
|Tractive effort||30,576 lbf (136.0 kN)|
|Operator(s)||New South Wales Government Railways|
|Class||T524, D50 from 1924|
|Number in class||280|
|Disposition||4 preserved, 276 scrapped|
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.
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 8 locomotives were subsequently acquired by the Nord-Belge railway in Belgium and, following rebuilding, assigned to work coal trains along the Meuse Valley. The 2 other locomotives were accuired by S.A. Force, Eclairage et Docks de Gand in Ghent, Belgium. The Commonwealth Railways also chose this design to be their first goods locomotive class, building eight K-class, for the Trans-Australian Railway.
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.
In the 1930s 72 were withdrawn and after being used during the load testing of the Sydney Harbour Bridge in 1932 with most of these locomotives being latter scrapped, although 14 were rebuilt with superheaters and returned to service. 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.
5069 and 5132, both preserved at Dorrigo, were 2 of the 88 locomotives used to test the Sydney Harbour Bridge before it opened. 5132 is the only superheated 50 class preserved and it is fitted with the only preserved Mort's Dock tender. 5069 is in operational condition.
|Preserved D50 Class Locomotives|
|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|
5096 stored at Broadmeadow No.2 Roundhouse
- Oberg, Leon (1984). Locomotives of Australia 1850's - 1980's. Frenchs Forest: Reed Books. pp. 76–77. ISBN 0 730100 05 7.
- 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.
- Dagant, André (2009). La Compagnie du Nord-Belge et ses locomotives. Editions PFT. pp. 264-274.