New South Wales 41 class locomotive
|New South Wales 41 class|
4105 heading for Campbelltown in March 1961
|Type and origin|
|Builder||British Thomson-Houston, Rugby, United Kingdom|
|Gauge||1,435 mm (4 ft 8 1⁄2 in)|
|Wheel diameter||42 in (1,067 mm)|
43 ft 0 in (13.11 m),
Over coupler pulling faces:
47 ft 3 in (14.40 m)
|Width||9 ft 4 in (2.84 m)|
|Height||14 ft 0 in (4.27 m)|
|Axle load||20 long tons 10 cwt (45,900 lb or 20.8 t)|
|Locomotive weight||82 long tons 0 cwt (183,700 lb or 83.3 t)|
|Fuel capacity||500 imp gal (2,300 L; 600 US gal)|
|Lubricant capacity||45 imp gal (200 L; 54 US gal) per engine|
|Coolant capacity||40 imp gal (180 L; 48 US gal) per engine|
|Sandbox capacity||11.5 cu ft (0.33 m3)|
|Prime mover||Paxman 12-RPHL, 2 of|
|Engine RPM range||680-1300|
|Engine type||Four-stroke diesel|
|Generator||British Thomson-Houston RTB 10844|
|Traction motors||British Thomson-Houston 157AZ, 4 of|
|Cylinder size||7 in × 7.75 in (178 mm × 197 mm)|
|Maximum speed||57 mph (92 km/h)|
|Power output||Gross: 400 hp (298 kW) per engine,
For traction: 360 hp (268 kW) per engine
|Tractive effort||Continuous: 22,800 lbf (101.42 kN) at 11 mph (18 km/h)|
|Operator(s)||New South Wales Government Railways|
|Number in class||10|
|First run||1 December 1953|
|Withdrawn||30 June 1975|
|Disposition||1 preserved, 9 scrapped|
In 1950 the New South Wales Government Railways ordered 10 diesel locomotives from Australian General Electric. The construction was sublet to British Thomson-Houston of Rugby in the United Kingdom with the body built by Metro Cammell, Birmingham. The first entered service in December 1953 and the last in February 1955. All were delivered painted in verdant green, in the 1960s all were repainted Indian red.
From their earliest days the locomotives suffered failures including overheating and fires. To try and overcome this two had their mufflers relocated. The modification was considered a success, but not rolled out across the rest of the class. The locomotives were equipped to operate in multiple however the cooling system layout saw radiator heat passing from the leading locomotive to the trailing one, resulting in the equipment being removed.
By the early 1960s with the twin Paxman 12-RPHL engines coming to the end of their useful life, the Mechanical Branch began looking at repowering options. With the cost of repowering and overhauling the Class 41s being two-thirds that of a new Class 48 and repair costs per mile over nine times greater, it was decided not to proceed with this.
One was set aside in December 1967, while overhauls ceased for the rest of the class in 1972 with each locomotive withdrawn as it suffered a major failure, the final locomotive being withdrawn in June 1975. The class were mainly confined to metropolitan Sydney operating local trip workings and shunting at Enfield yard.
After it arrived at Thirlmere in January 1977, the seized engine that led to its demise was temporarily repaired by members of the Illawarra Group. In 1982 an engine failed whilst returning from a trip to Picton and as a consequence 4102 was then used as an one-engine shunter until the batteries finally wore out in 1987.
By July 1991 it had moved to CountryLink's XPT Maintenance Centre in Sydenham (where the Paxman engined XPTs are maintained), where a spare engine was installed. It returned to Thirlmere in November 1992, but was not restored to service. In April 2009 4102 was moved for further storage at the Broadmeadow Locomotive Depot.
|Number||Serial No||Entered Service||Withdrawn||Kilometres Travelled|
|4101||1000||1 Dec 1953||6 Jun 1973||463,514|
|4102||1002||30 Oct 1953||30 Jun 1975||492,650|
|4103||1003||18 Jan 1954||2 Apr 1974||462,871|
|4104||1004||13 Jan 1954||12 Oct 1973||440,810|
|4105||1005||8 Feb 1954||?||?|
|4106||1006||21 Jan 1954||4 Aug 1972||406,288|
|4107||1007||25 Jan 1954||11 Aug 1973||446,167|
|4108||1008||22 Feb 1954||20 Dec 1967||402,026|
|4109||1009||11 Mar 1954||9 Feb 1972||426,074|
|4110||1010||10 Feb 1955||20 May 1974||476,489|
- Leaver, Allan (January 1984). "41 Class Album". Roundhouse (NSW Rail Transport Museum).
- "The 41-Class Diesel-Electric Locomotive". Australian Railway Historical Society Bulletin: pp 1–3. January 1954.
- 41 Class Railpage
- Class 41 Vicsig
- RailCorp S170 Heritage & Conservation Register RailCorp
- Locomotive, Diesel 4102 NSW Government Environment & Heritage
- "4102" Railway Digest August 1991 page 282
- "Locomotives and Traffic 4102" Railway Digest March 1993 page 108
- New South Wales Rail System Locomotives. Sydney: Archives Section, State Rail Authority of New South Wales. 1984.
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