Downer EDI Rail GT42CU ACe

Class of Australian diesel-electric locomotive

GT42CU ACe

QR National 4140 at Downer Rail, Maryborough in September 2010

Type and origin
Power type	Diesel-electric
Builder	Downer Rail, Maryborough
Model	Electro-Motive Diesel GT42CU ACe
Build date	2007–2013
Total produced	132

Specifications
Configuration:
• UIC	Co'Co'
Gauge	1,067 mm (3 ft 6 in)
Length	22.0 m (72 ft 2 in)
Loco weight	120 t (120 long tons; 130 short tons)
Fuel type	Diesel
Prime mover	EMD 12N-710G3B-ES
Engine type	V12 Diesel engine
Alternator	EMD TA12-QBE/CA7C
Traction motors	EMD A2916-8
Cylinders	12
Cylinder size	11.63 L (710 cu in)
Loco brake	Dynamic
Train brakes	NYAB/Knorr-Bremse CCB II

Performance figures
Maximum speed	100 km/h (62 mph)
Power output	2,460 kW (3,300 hp)

Career
Operators	Aurizon East Coast Rail Pacific National
Number in class	132
Numbers	4101–4140, 4153–4167 ACN4141–ACN4152, ACN4168–ACN4175 8301–8352 GWN001–GWN005
Disposition	132 in service

The GT42CU ACe is a model of diesel electric locomotives manufactured by EDi Rail, Maryborough between 2007 and 2013 under licence from Electro-Motive Diesel, for use on narrow gauge railways in Queensland, South Australia and Western Australia.

History

The GT42CU ACe is an evolution of the GT42CU AC being fitted with a different computer system and traction motors.^[1]

In 2006, Queensland Rail placed an initial order for 15, with a further orders increasing the number to 75. These were designated as the 4100 class.^[2] Following Queensland Rail purchasing Australian Railroad Group in June 2006, 19 were transferred to Western Australia and reclassified as the ACN class, but retain their original numbers.^[3]

The Queensland based units are primarily used on the Blackwater, Moura and Newlands coal networks, and on phosphate trains between Mount Isa and Townsville. The Western Australian-based units are primarily engaged hauling iron ore trains. All were included in the transfer of Queensland Rail's freight business to QR National in July 2010.

Pacific National placed an order for 13 units for coal haulage on the Blackwater system that later grew to 46. These were designated as the 83 class.^[4]

In July 2012, One Rail Australia placed an order for five for use in South Australia.^[5] Designated the GWN class, they operated on the Arrium iron ore railway to Whyalla Steelworks.^[6]^[7] They were transferred to Queensland after being displaced by 5 Queensland Railways 2250 class locomotives returning to Australia from South Africa.

A further six were built as a speculative order for Locomotive Demand Power as the LDP class.^[8] One was painted in Pacific National livery and numbered 8347 in anticipation of a lease that failed to eventuate, the others were numbered LDP016-LDP020 with all six placed in store in Maryborough. All were included in the sale of Downer Rail's locomotive business to Progress Rail Services and in December 2017, were moved to Redbank Railway Workshops entering service as 8347–8352 with Pacific National in April and May 2018.^[9]^[10]

Fleet

Operator	Class	Number in class	Road numbers	Built	Notes
Aurizon	4100	54	4101–4140, 4153–4167	2007–2011	Used in Queensland
Aurizon	ACN	21	ACN4141–ACN4152, ACN4168–ACN4175	2011–2012	Used in Western Australia
East Coast Rail	GWN	5	GWN001–GWN005	2012	Transferred to QLD during 2019–2020 for Coal workings
Pacific National	83	52	8301–8352	2008–2013	8347–8352 built as speculative order in 2013, entered service with Pacific National 2018

Related Development

References

^ 4100 Class Queensland's Rail Interest Group
^ 4100 Class Railpage
^ ACN Class Railpage
^ 83 Class Railpage
^ "GWA boosts locomotive fleet". Rail Express. 18 July 2012. Archived from the original on 22 February 2014.
^ GWN Class Railpage
^ "The new Downer/EDI GWN Class locomotives" Railway Digest May 2013 pages 30–31
^ LDP Class (GT42CU-AC) Railpage
^ "Motive Power Roundup" Motive Power issue 117 May 2018 page 74
^ "LDP Class locomotives become additional 83 Class following Pacific National purchase from Progress Rail" Railway Digest June 2018 page 17