Indian locomotive class WDP-1

The Indian locomotive class WDP-1 is a class of diesel-electric locomotive that was developed in 1995 by Banaras Locomotive Works (BLW) for Indian Railways. The model name stands for broad gauge (W), Diesel (D), Passenger traffic (P) engine, 1st generation (1). They entered service in 1995. A total of 69 WDP-1 units were built at Banaras Locomotive Works (BLW), Varanasi between 1995 and 1999.

WDP-1
BZA based WDP-1 hauling Shesadri express arrived Samalkot Jn.
Type and origin
Power typeDiesel
BuilderBLW
ModelDL560C
Build date1995-99
Total producedWDP-1: 69
Specifications
Configuration:
​
 • UICBo′Bo′
 • CommonwealthBo-Bo
Gauge1,676 mm (5 ft 6 in)
BogiesBo-Bo fabricated bogies loosely based on the Flexicoil models
Wheel diameter1,092 mm (3 ft 7 in)
Wheelbase12.834 m (42 ft 1+1⁄4 in)
Length14.810 m (48 ft 7+1⁄8 in)
Width2.95 m (9 ft 8+1⁄8 in)
Height4.077 m (13 ft 4+1⁄2 in)
Axle load20,000 kg (44,000 lb)
Loco weight80,100 kg (176,600 lb)
Fuel typeDiesel
Fuel capacity5,000 L (1,100 imp gal; 1,300 US gal)
Prime moverALCO 251-C
RPM range390rpm-400rpm idling, 1000rpm at 8th notch
Engine typeV12 diesel
AspirationTurbo-supercharged
Traction motorsBHEL 5002AZ CGL 7362A
Cylinders12
Cylinder size228 mm × 266 mm (8.98 in × 10.47 in)
bore x stroke
TransmissionDiesel-electric transmission
MU working2
Train brakesAir and Dual
Performance figures
Maximum speed140 km/h (87 mph)
Power outputMax:2,300 hp (1,700 kW)
Site rated:2,000 hp (1,500 kW)
Tractive effort20 t (20 long tons; 22 short tons)
Career
OperatorsIndian Railways
Numbers15001-15069
LocaleAll over Indian Railways
Dispositionactive

The WDP-1 served both passenger and freight trains for over 28 years. Despite the introduction of more modern types of locomotives like WDG-4 and electrification, a significant number are still in use, both in mainline and departmental duties. As of April 2022, 44 locomotives still retain "operational status" on the mainline.

History

The WDP-1 is a lower powered version of the WDM-2. These locos have a 2300 hp powerpack, . The engine is a converted version of the Alco 251C model with a 12-cylinder engine and low overall weight with a max. speed of 140 km/h, Bo-Bo fabricated bogies loosely based on the Flexicoil models. They are still in service and are homed either at TKD & BZA to haul short commuter trains and shunting around the area. They look just like all other ALCOs and are easily identified by the laterally “sculpted” and baldie grille-less short hood.

WDP1M is a rebuilt version with better powerpack and better cooling via a modified radiator. The biggest change is in the suspension. Rubber springs have been provided instead of coil springs, along with other changes to the suspension and axle components.

The scrapping of these locomotives has begun. All WDP-1 locomotives of BZA DLS were condemned in February 2023 and scrapped at DLS.

Locomotive sheds
ZoneNameShed CodeQuantity
Northern RailwayTughlakabadTKD44
Total Locomotives Active as of 01-03-2023[1]44

Former sheds
ZoneNameShed Code
South Central RailwayKazipetKZJ
VijayawadaBZA
North Eastern RailwayIzzatnagarIZN

See also

References
  1. "Railway Website Mechanical Department" (PDF). Retrieved 16 May 2020.
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