4D (train)
| Double-deck Prototype | |
|---|---|
4D train at Spencer Street
|
|
| In service | 1992-2002 |
| Manufacturer | A Goninan & Co |
| Built at | Broadmeadow |
| Family name | Tangara |
| Entered service | 10 March 1992 |
| Scrapped | 2006 |
| Number built | 4 |
| Formation | 4 carriages |
| Fleet numbers | 6000T-5000M-5002M-6002T |
| Capacity | 346 seated, 628 standing |
| Operator(s) | Public Transport Corporation |
| Depot(s) | Bayswater |
| Line(s) served | Belgrave, Lilydale |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 20.32 m (66 ft 8 in) |
| Width | 2.89 m (9 ft 6 in) |
| Height | 4.27 m (14 ft 0 in) |
| Doors | 4 twin-leaf plug doors per carriage |
| Articulated sections | 3 per set, enclosed gangway |
| Maximum speed | 130 km/h (81 mph) |
| Weight | 186 tonnes (183 long tons; 205 short tons) |
| Traction system | 8 x 170 kW (230 hp), chopper control |
| Acceleration | 0.75 m/s2 (2.5 ft/s2) |
| Power supply | (?) |
| Electric system(s) | 1500 V DC Overhead lines |
| Current collection method | Pantograph |
| Track gauge | 1,600 mm (5 ft 3 in) |
The 4D was a prototype double deck electric multiple unit built for the Public Transport Corporation, Victoria, Australia, for operation on the Melbourne railway system. It remains the only double deck train ever to have run in Melbourne. The train's name stood for "Double Deck Development and Demonstration."
Depending on sources, the intention was for this train to be the demonstration unit for a future order of either 20 or 50 extra sets, had the tests been successful.
Built by A Goninan & Co, Broadmeadow it was delivered by rail in December 1991. Funding for the train was supplied from both the Victorian and Commonwealth governments.
The train's design was based on the Tangara train being built by A Goninan & Co for CityRail in Sydney, however it was similar only in terms of interior and exterior bodywork; the train's electrical system was much closer to that of the Comeng sets. The design was further modified for use on Melbourne's broad gauge track, and its control system was designed specifically to allow in-service coupling and operation with Comeng sets. In addition, the individual carriages were thinner and shorter in both length and width against their predecessors, to fit the Melbourne loading gauge.
It was manufactured from stainless steel, fitted with air-conditioning, tinted windows, and inter-car doors allowing passengers to access all carriages of the train. Much of the equipment matched Sydney's Tangara fleet, from the traction motors (8x MB 3303B) down to small fittings like console buttons.
The four-car set had a total passenger capacity of 974 passengers (346 seated and 628 standing); considerably more than a three-car Comeng train of similar length, which would only hold 763 passengers in crush load conditions, including 263 seated. However, the set had about the same seating capacity as a Tait train - 10 seats per compartment, 34 compartments per four-carriage set, with no data available on crush loads.
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