WDM-2
A WDM-2 at Agra Cantt. Railway Station
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| Type and origin | |
|---|---|
| Power type | Diesel |
| Builder | Alco, DLW |
| Model | DL560C |
| Build date | 1962 onwards |
| Total produced | 2700+ |
| Specifications | |
|---|---|
| UIC class | Co-Co, Co'Co' |
| Gauge | 1,676 mm (5 ft 6 in) |
| Bogies | ALCO Asymmetric cast frame trimount |
| Wheel diameter | 1,092 mm (3 ft 7 in) |
| Wheelbase | 12.834 m (42 ft 1 1⁄4 in) |
| Length | 17.12 m (56 ft 2 in) |
| Width | 2.864 m (9 ft 4 3⁄4 in) |
| Height | 4.185 m (13 ft 8 3⁄4 in) |
| Axle load | 18,800 kg (41,400 lb) |
| Loco weight | 112,800 kg (248,700 lb) |
| Fuel type | Diesel |
| Fuel capacity | 5,000 L (1,100 imp gal; 1,300 US gal) |
| Prime mover | ALCO 251-B |
| RPM range | 400 - 1000 rpm |
| Engine type | V16 diesel |
| Aspiration | Turbo-supercharged |
| Traction motors | GE752, BHEL 4906 BZ and 4907 AZ |
| Cylinders | 16 |
| Cylinder size | 228 mm × 266 mm (8.98 in × 10.47 in) bore x stroke |
| Transmission | Diesel-electric transmission |
| MU working | 2 |
| Train brakes | Air, Vacuum and Dual |
| Performance figures | |
|---|---|
| Maximum speed | 120 km/h (75 mph) |
| Power output | Max:2,600 hp (1,900 kW) Site rated:2,430 hp (1,810 kW) |
| Tractive effort | 30.4 t (30 long tons; 34 short tons) |
| Factor of adh. | 0.27 |
| Career | |
|---|---|
| Operators | Indian Railways |
| Numbers | 16000-16887, 17100-17999, 18040-18079, 18112-18514, 18523-18900, 18903-18999 |
| Nicknames | Jumbo, Prabal |
| Locale | All over Indian Railways |
| Preserved | 3 |
| Disposition | active |
The class WDM-2 is Indian Railways' workhorse diesel locomotive. The first units were imported fully built from the American Locomotive Company (Alco) in 1962. Since 1964, it has been manufactured in India by the Diesel Locomotive Works (DLW), Varanasi. The model name stands for broad gauge (W), diesel (D), mixed traffic (M) engine. The WDM-2 is the most common diesel locomotive of Indian Railways.
The WDM-2A is a variant of the original WDM-2. These units have been retro-fitted with air brakes, in addition to the original vacuum brakes. The WDM-2B is a more recent locomotive, built with air brakes as original equipment. The WDM-2 locos have a maximum speed of 120 km/h (75 mph), restricted to 100 km/h (62 mph) when run long hood forward - the gear ratio is 65:18.
In the early 1960s Indian Railways began conversion of its mainline from steam to diesel locomotives. For this conversion General Motors Electro-Motive Division (EMD) and the American Locomotive Company (ALCO) were asked to submit designs for new diesel locomotives. Each company submitted prototypes. Indian Railways designated these prototypes the WDM-4 class and the WDM-2 class respectively. Technologically the General Motors WDM-4 was superior to ALCO's WDM-2, but Indian Railways required a transfer of technology agreement that would allow these locomotives to be manufactured in India. General Motors did not agree to the transfer of technology agreement so the ALCO prototype was selected for production. The first few prototype WDM-2s were imported. After Diesel Locomotive Works (DLW) completed construction of its factory in Varanasi, production of the locomotives began in India. The first 12 locos were built using kits imported from ALCO in the United States. After that DLW started manufacturing the WDM-2 locomotives from their own components. Since then over 2,800 locomotives have been manufactured and the WDM-2 has become the most popular locomotive in India.
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Wikipedia