The Indian locomotive class WDG-6G (GE ES57ACi)[1] is a class of diesel–electric locomotive used by the Indian Railways for freight duty. The locomotive is a higher power variant of the WDG-4G locomotive which was also designed by General Electric. The design platform is based on the GE Evolution Series and features a 4-stroke 16-cylinder fully turbocharged engine which delivers around 6,000 hp (4,500 kW), making it the most powerful diesel locomotive of IR (the second being its WDG-5 predecessor).[2] It is the only 6,000 hp diesel electric locomotive at 23t axle load, making it the lightest locomotive in its category in the world.[1][3] This locomotive, has been named as "Angad" after the character of the same name from the Hindu Epic Ramayana.
Quick facts WDG-6G, Type and origin ...
| WDG-6G |
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 Roza based WDG-6G twins at Bilaspur |
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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) |
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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 ft 3 in) |
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| Pivot centres | 14,224 mm (46 ft 8.0 in) |
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Length:
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| • Over couplers | 22,313 mm (73 ft 2.5 in) |
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| Width | 3,200 mm (10 ft 6 in) |
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| Height | 4,227 mm (13 ft 10.4 in) |
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| Axle load | 23 t (23 long tons; 25 short tons) |
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| Loco weight | 138 t (136 long tons; 152 short tons) |
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| Fuel type | Diesel |
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| Fuel capacity | 8,300 L (1,800 imp gal; 2,200 US gal) |
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| Lubricant cap. | 1,300 L (290 imp gal; 340 US gal) |
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| Coolant cap. | 1,468 L (323 imp gal; 388 US gal) |
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| Sandbox cap. | 170 L (37 imp gal; 45 US gal) |
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| Prime mover | GE GEVO-16 |
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| RPM: | |
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| • Maximum RPM | 1,050 rpm |
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| Engine type | V16 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 | 5GDY131B |
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| Traction motors | 5GEB32B5 AC traction motors |
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| Cylinders | 16 |
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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 | 85:16 |
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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 | 6,000 hp (4,500 kW) |
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Tractive effort:
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| • Starting | 570 kN (130,000 lbf) |
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| • Continuous | 420 kN (94,000 lbf) |
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| Brakeforce | 290 kN (65,000 lbf) |
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| Career |
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| Operators | Indian Railways |
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| Numbers | 69001+ |
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| Nicknames | ANGAD |
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| Locale | All over India |
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| Disposition | Active |
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