Indian Railway shunter class diesel locomotive
WDS-6 |
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Tuglakabad based WDS-6 roaming at Anand Vihar Terminal. |
Type and origin |
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Power type | Diesel |
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Builder | BLW, Central Railway Loco Workshop, Parel |
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Build date | 1975+ |
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Total produced | WDS-6: 300 WDS-6AD: 111 |
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Rebuilder | Parel Workshops |
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Specifications |
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Configuration:
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• UIC | Co′Co′ |
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• Commonwealth | Co-Co |
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Gauge | 1,676 mm (5 ft 6 in) |
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Bogies | ALCO Asymmetric cast frame trimount |
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Wheel diameter | 1,092 mm (3 ft 7 in) |
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Wheelbase | 12.834 m (42 ft 1+1⁄4 in) |
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Length | 16.088 m (52 ft 9+3⁄8 in) |
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Width | 2.864 m (9 ft 4+3⁄4 in) |
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Height | 4.185 m (13 ft 8+3⁄4 in) |
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Axle load | 21,000 kg (46,000 lb) |
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Loco weight | 113,000 kg (249,000 lb) |
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Fuel type | Diesel |
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Fuel capacity | 3,000 L (660 imp gal; 790 US gal) |
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Lubricant cap. | 530 L (120 imp gal; 140 US gal), 630 L (140 imp gal; 170 US gal) DLW |
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Water cap. | 22 L (4.8 imp gal; 5.8 US gal), 28 L (6.2 imp gal; 7.4 US gal) DLW |
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Prime mover | ALCO 251-D |
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RPM range | 400-1100 |
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Engine type | Inline, 6-cylinder, diesel |
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Aspiration | Turbo-supercharged |
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Displacement | 267 mm |
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Generator | DC |
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Traction motors | 6 DC |
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Cylinders | 6 |
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Transmission | Diesel-electric transmission |
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MU working | 2 |
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Loco brake | 28LV-1, Air brake for Locomotive using SA-9 brake handle |
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Train brakes | Originally vacuum, or air, but some modified to dual |
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Performance figures |
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Maximum speed | 71 km/h (44 mph) |
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Power output | Max:1,400 hp (1,000 kW) Site rated:1,300 hp (970 kW) |
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Tractive effort | 34.000 t (33 long tons; 37 short tons) maximum 16.050 t (16 long tons; 18 short tons) continuous |
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Career |
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Operators | Indian Railways |
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Locale | All over Indian Railways, also leased and sold to some private- and public-sector industrial concerns |
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Current owner | Indian Railways, private industries |
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Active |
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The Indian locomotive class WDS-6 is a diesel-electric locomotive used by the Indian Railways mainly for shunting and also for performing departmental duties. The model name stands for broad gauge (W), Diesel (D), Shunting (S) engine, 6th generation (6). As of April 2022, 375 units of this class are currently in use all over India.
History
This class was designed in 1975 to address the need for a powerful shunting locomotive with the ability to haul 20- to 24-coach rakes. The previous WDS-4 class was found to be grossly underpowered for this kind of operation. A WDS-6 locomotive basically consists of a YDM-4 powerpack (a 6-cylinder, 4-stroke, inline, turbo-supercharged ALCo engine) mounted on a WDM-2 body frame. Beginning in 1975, these were initially manufactured solely by BLW, Varanasi, but later, the Parel Workshop started building them using CKD (completely-knocked-down) kits provided by DLW. WDS-6 units can be easily recognized by their low short hoods (with two cab windows above these) and flat-ended cabs on the long-hood end. Many of them were sold and transferred to private industrial concerns and public sector undertakings (PSUs) in huge numbers, but still display their IR road numbers.
Locomotive sheds
Total Locomotives active as of April 2024 : 192
Liveries
Technical specifications
[1]
Manufacturers | DLW, Parel Workshop |
Engine | Alco 251-D, Inline-6, 1,400 hp (1,000 kW) (1,300 hp or 970 kW site rating) with Alco turbocharged engine. 1,100 rpm max, 400 rpm idle; 228 mm × 267 mm (8.98 in × 10.51 in) bore x stroke; compression ratio 12.5:1. |
Transmission | Electric, DC-DC (DC Generator and DC Traction motor) |
Traction motors | GE for original Alco and MLW models, BHEL for DLW |
Axle load | 21 t (21 long tons; 23 short tons) |
total weight | 113 t (111 long tons; 125 short tons) |
Bogies | Alco design cast frame trimount (Co-Co) bogies |
Starting TE | 34 t (33 long tons; 37 short tons), at adhesion 27% |
Length over buffer beams | 17,370 mm (56 ft 11+7⁄8 in) |
Distance between bogies | 10,516 mm (34 ft 6 in) |
Gallery
See also
Bibliography
- Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN 0-9521655-1-1. OCLC 35135033.
References
- ^ "[IRFCA] Indian Railways FAQ: Locomotives -- Specific classes : AC Electric". www.irfca.org.
- RDSO document for WDS-6(archived copy)
- https://www.irfca.org/faq/faq-loco2d.html
- https://www.irfca.org/faq/faq-specs.html#WDS-6
- https://www.irfca.org/apps/locos/list
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