| WDG-4G |
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Gandhidham based WDG-4G twins at New Jalpaiguri Jn. |
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| Specifications |
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Configuration:
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| • Commonwealth | Co-Co |
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| Gauge | 1,676 mm (5 ft 6 in) Broad Gauge |
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| Bogies | Co-Co Fabricated Bogie |
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| Wheel diameter | New: 1,092 mm (43.0 in)
Condemned: 1,016 mm (40.0 in) |
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| Minimum curve | 174 m (571 ft) radius |
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| Wheelbase | 1,900 mm (6.2 ft) (adjacent) |
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| Pivot centres | 14,478 mm (14.478 m) |
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Length:
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| • Over couplers | 22,567 mm (22.567 m) |
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| Width | 3,200 mm (3.2 m) |
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| Height | 4,227 mm (4.227 m) |
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| Axle load | 22 t (22,000 kg) |
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| Loco weight | 132,000 kg (132 t) |
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| Fuel type | Diesel |
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| Fuel capacity | 6,300 L (1,400 imp gal; 1,700 US gal) |
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| Lubricant cap. | 1,030 L (230 imp gal; 270 US gal) |
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| Coolant cap. | 1,249 L (275 imp gal; 330 US gal) |
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| Sandbox cap. | 170 L (37 imp gal; 45 US gal) |
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| Prime mover | GE GEVO-12 |
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| RPM: | |
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| • Maximum RPM | 1050 rpm |
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| Engine type | V12 Diesel engine, 4-stroke engine |
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| Aspiration | turbocharged |
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| Displacement | 15.7L per cylinder |
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| Alternator | 5GDY100C |
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| Traction motors | 5GEB24 AC traction motors |
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| Cylinders | 12 |
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| Cylinder size | 250 mm × 320 mm (9.8 in × 12.6 in) |
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| Transmission | Diesel–electric |
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| Gear ratio | 85:18 |
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| MU working | Yes, AAR Type |
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| Loco brake | Air, Dynamic Brake |
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| Train brakes | Air |
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| Compressor | 178 CFM @ 145 psig |
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| Couplers | CBC AAR Type-E |
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| Performance figures |
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| Maximum speed | 100 km/h (62 mph) |
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| Power output | 4,500 hp (3,400 kW) |
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Tractive effort:
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| • Starting | 544 kN (122,000 lbf) |
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| • Continuous | 405 kN (91,000 lbf) |
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| Brakeforce | 220 kN (49,000 lbf) |
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The Indian locomotive class WDG-4G (GE ES43ACmi) is a class of dual-cabin freight-hauling diesel–electric locomotive used by the Indian Railways (IR). The locomotive is designed by GE Transportation and is based on its Evolution Series, which are used in North America. The class is meant for freight hauling and replaces the older American Locomotive Company (ALCO)-designed locomotives, which have been the mainstay diesels of Indian Railways since 1962. Equipped with a 12-cylinder fully turbocharged GEVO engine, it is claimed to be 50% more environmentally friendly than its predecessors and is the first in the country to be compliant with level one of the emission norms set by the International Union of Railways (UIC-1). The locomotive has two cabs for easy reversal, both of which are air conditioned.
The locomotive is part of a 13-year contract between Indian Railways and GE Transportation under which 700 such locomotives will be produced indigenously. Diesel Locomotive Factory, Marhowrah was set up by GE for the production and supply of these locomotives which is also seen as a boost to the Make in India initiative. The maintenance of the locomotive will be GE's responsibility which will also have to ensure that 95% of the fleet is ready at all times. For this, real time remote tracking and fault diagnostics has been implemented in the locomotive.
