Indian locomotive class WDM-7

Specifications
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	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	17,800 kg (39,200 lb)
Loco weight	96,000 kg (212,000 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	V12 diesel
Traction motors	BHEL 4906 BZ and 4907 AZ
Cylinders	12
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in); bore×stroke
Transmission	Diesel-electric transmission
MU working	2 units
Train brakes	Air, Vacuum and Dual

Type and origin
Type and origin
Power type	diesel
Builder	BLW
Model	DL560C
Build date	1987-1989
Total produced	15

Indian locomotive class WDM-7
Indian locomotive class WDM-7
	WDM-7 #11008 hauling a freight train; this loco is fuelled by bio-diesel
Power type
Type and origin
Power type	diesel
Builder	BLW
Model	DL560C
Build date	1987-1989
Total produced	15
Configuration:;
Specifications
Configuration:;
• UIC	Co′Co′
• Commonwealth	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	17,800 kg (39,200 lb)
Loco weight	96,000 kg (212,000 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	V12 diesel
Traction motors	BHEL 4906 BZ and 4907 AZ
Cylinders	12
Cylinder size	228 mm × 266 mm (8.98 in × 10.47 in); bore×stroke
Transmission	Diesel-electric transmission
MU working	2 units
Train brakes	Air, Vacuum and Dual
Maximum speed
Performance figures
Maximum speed	105 km/h (65 mph)
Power output	Max:2,000 hp (1,500 kW); Site rated:1,800 hp (1,300 kW)
Tractive effort	25.3 t (25 long tons; 28 short tons)
Operators
Career
Operators	Indian Railways
Numbers	11001-11015
Locale	SR
Disposition	active

The WDM-7 is a diesel-electric locomotive of Indian Railways. It has been manufactured by Banaras Locomotive Works (BLW), Varanasi. The model name stands for broad gauge (W), diesel (D), mixed traffic (M) engine. Today, these are found exclusively at Chennai Central and nearby area.

These units have been retro-fitted with air brakes, in addition to the original vacuum brakes. The WDM-7 locos have a maximum speed of 105 km/h (65 mph), restricted to 100 km/h (62 mph) when run long hood forward - the gear ratio is 94:17.

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