The Comeng (/ˈkɒmɛndʒ/ KOM-enj) is a class of electric multiple unit (EMU) operating on the suburban railway network of Melbourne. Built by their namesake Commonwealth Engineering (abbreviated as Comeng), the trains were introduced in 1981 as a replacement for the Tait and Harris trains. In total, 190 three-car trainsets were built, although only 100 remain in service and are expected to be retired by 2030.
Comeng
Alstom-refurbished Comeng 571M on a Werribee-bound service near Westona Station, November 2023
Interior of an Alstom-refurbished Comeng with life extension upgrades
Stock type
	Electric Multiple Unit
In service
	28 September 1981 – present
Manufacturer
	Commonwealth Engineering
Built at
	Dandenong, Victoria
Replaced
	

    Tait
    Harris

Constructed
	1981–1988
Refurbished
	

    Alstom & EDi Rail (2000–2003)
    UGL Rail (2017–2021)

Scrapped
	2021–present
Number built
	570 carriages (190 sets)
Number in service
	300 carriages (100 sets)
Number scrapped
	226 carriages
Successor
	

    High Capacity Metro Train
    X'Trapolis 2.0

Formation
	3-car sets (M–T–M)
Fleet numbers
	

    301M–468M, 471M–554M, 561M–680M, 691M–698M
    1001T–1084T, 1086T–1127T, 1131T–1190T, 1196T–1199T

Capacity
	210 seated, 765 crush load per 3-car unit
Operators
	Metro Trains Melbourne (2009–present)
Previous:

Depots
	Calder Park
Craigieburn
Kananook
Newport
Lines served
	

    Craigieburn Upfield
    Frankston
    Sandringham Werribee Williamstown
    Flemington Racecourse

Specifications
Car body construction
	Stainless steel
Train length
	71.2 m (233 ft 7+1⁄8 in)
Car length
	

    24 m (78 ft 8+7⁄8 in) (motor carriages)
    23.2 m (76 ft 1+3⁄8 in) (trailer carriages)

Width
	3.05 m (10 ft 1⁄16 in)
Height
	3,835 mm (12 ft 7 in)
Doors
	3 per side
Maximum speed
	115 km/h (71 mph)
Weight
	141 t (139 long tons; 155 short tons) (max)
Traction system
	

    Resistance control (301M–468M, 471M–554M, 561M–680M)
    Chopper control (691M–698M)

Traction motors
	8 × GEC G317AZ 124 kW (166 hp) (continuous) series-wound DC motor
Power output
	992 kW (1,330 hp) (continuous)
Acceleration
	0.8 m/s2 (2.6 ft/s2)
Deceleration
	

    0.85 m/s2 (2.8 ft/s2) (service)
    0.95 m/s2 (3.1 ft/s2) (emergency)

Electric system(s)
	1,500 V DC (nominal) from overhead catenary
Current collection
	Pantograph
UIC classification
	Bo′Bo′+2′2′+Bo′Bo′
Bogies
	

    Bradford Kendall B.K.12390 (tread brake, motor cars)
    Bradford Kendall B.K.12391 (tread brake, trailer cars)
    Linke-Hofmann-Busch (disc brake)
    Alstom (disc brake replacement)

Braking system(s)
	Electro-pneumatic and rheostatic

    Westinghouse Westcode tread brakes (first order)
    Knorr-Bremse disc brakes (second order)

Coupling system
	Scharfenberg
Track gauge
	1,600 mm (5 ft 3 in) broad gauge
Notes/references
[1][2][3]

The fleet underwent two major refurbishments. The first, a mid-life refurbishment, was carried out from 2000 to 2003 by Alstom and EDi Rail. The second, named the Comeng Life Extension Project, completed between 2017 and 2021, aimed to extend the trains' lifespan to meet their gradual replacement by the High Capacity Metro Trains and the X'Trapolis 2.0 trains. Alongside these upgrades, a number of minor improvement programs were also conducted on the trains to further enhance their efficiency, safety, and reliability.
Description

History

Retirement

Stored carriages


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