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),[2] restricted to 100 km/h (62 mph) when run long hood forward - the gear ratio is 94:17.
Fifteen of these locomotives (road numbers #11001 to #11015) were built from 1987 to 1989 as a low-powered, “lightweight” version of the original ALCO. Like the WDM-6, maybe IR wanted a lower powered locomotive to handle small rake local and passenger services. However, all sheds declined them and they ended up at Ernakulam where they were used to handle local and shuttle services with good degrees of efficiency. Becoming aware of their abilities, SR moved all the WDM-7s out of Ernakulam to Tondiarpet, where they are housed today. These days, they are seen being used as shunters at Chennai Central or for light passenger haulage. One (#11008) has been modified to run on bio-diesel.
These Co-Co diesel-electric locomotives were designed primarily for branch-line duties (top speed 105 km/h). They have two 3-axle bogies. The power-pack is a 12-cylinder Alco 251B unit. They are a lower-powered variant of the WDM-2 (the latter produces 2600 hp of usable power, as opposed to the WDM-7 which produces 2000 hp). They were formerly housed at Erode and Golden Rock as well. They are reliable and rugged locomotives even though low-powered. They can be easily recognised by the lack of grilles on the short hood; in fact, they look exactly the same as the WDM-2 except for the “clean” short-hood-forward nose without grilles. Two locos currently operate on a mixture of bio-diesel and diesel. As of today, all 15 built are still in service.
Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN0-9521655-1-1. OCLC 35135033.
External links
Wikimedia Commons has media related to Indian locomotive class WDM7.
Ministry of Railways (Railway Board)
[IRFCA] Indian Railways Locomotive Roster Changes
August 25, 2023
indian, locomotive, class, diesel, electric, locomotive, indian, railways, been, manufactured, banaras, locomotive, works, varanasi, model, name, stands, broad, gauge, diesel, mixed, traffic, engine, today, these, found, exclusively, chennai, central, nearby, . 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 Indian locomotive class WDM 7WDM 7 11008 hauling a freight train this loco is fuelled by bio dieselType and originPower typedieselBuilderBLWModelDL560CBuild date1987 1989Total produced15SpecificationsConfiguration UICCo Co CommonwealthCo CoGauge1 676 mm 5 ft 6 in BogiesALCO Asymmetric cast frame trimountWheel diameter1 092 mm 3 ft 7 in Wheelbase12 834 m 42 ft 1 1 4 in Length17 12 m 56 ft 2 in Width2 864 m 9 ft 4 3 4 in Height4 185 m 13 ft 8 3 4 in Axle load17 800 kg 39 200 lb Loco weight96 000 kg 212 000 lb Fuel typedieselFuel capacity5 000 L 1 100 imp gal 1 300 US gal Prime moverALCO 251 BRPM range400 1000 rpmEngine typeV12 dieselTraction motorsBHEL 4906 BZ and 4907 AZCylinders12Cylinder size228 mm 266 mm 8 98 in 10 47 in bore strokeTransmissionDiesel electric transmissionMU working2 units 1 Train brakesAir Vacuum and DualPerformance figuresMaximum speed105 km h 65 mph Power outputMax 2 000 hp 1 500 kW Site rated 1 800 hp 1 300 kW Tractive effort25 3 t 25 long tons 28 short tons CareerOperatorsIndian RailwaysNumbers11001 11015LocaleSRDispositionactive Contents 1 History 2 Locomotive shed 2 1 Former 3 See also 4 References 4 1 Notes 4 2 Bibliography 5 External links 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 2 restricted to 100 km h 62 mph when run long hood forward the gear ratio is 94 17 TNP WDM 7 resting in sidingHistory EditThis section does not cite any sources Please help improve this section by adding citations to reliable sources Unsourced material may be challenged and removed August 2023 Learn how and when to remove this template message Fifteen of these locomotives road numbers 11001 to 11015 were built from 1987 to 1989 as a low powered lightweight version of the original ALCO Like the WDM 6 maybe IR wanted a lower powered locomotive to handle small rake local and passenger services However all sheds declined them and they ended up at Ernakulam where they were used to handle local and shuttle services with good degrees of efficiency Becoming aware of their abilities SR moved all the WDM 7s out of Ernakulam to Tondiarpet where they are housed today These days they are seen being used as shunters at Chennai Central or for light passenger haulage One 11008 has been modified to run on bio diesel These Co Co diesel electric locomotives were designed primarily for branch line duties top speed 105 km h They have two 3 axle bogies The power pack is a 12 cylinder Alco 251B unit They are a lower powered variant of the WDM 2 the latter produces 2600 hp of usable power as opposed to the WDM 7 which produces 2000 hp They were formerly housed at Erode and Golden Rock as well They are reliable and rugged locomotives even though low powered They can be easily recognised by the lack of grilles on the short hood in fact they look exactly the same as the WDM 2 except for the clean short hood forward nose without grilles Two locos currently operate on a mixture of bio diesel and diesel As of today all 15 built are still in service Locomotive shed EditZone Name Shed Code QuantitySouthern Railway Tondiarpet TNP 14Total Locomotives Active as of June 2023 3 14Former Edit Ernakulam Erode Golden RockSee also EditIndian locomotive class WDM 2 List of diesel locomotives of India Rail transport in India Rail transport in India HistoryReferences EditNotes Edit WDM7 twins Sheeju Chandran Interactive Diagram of the WDM 2 Locomotive Indian Railways Fan Club IRFCA Bibliography Edit Hughes Hugh 1996 Indian Locomotives Part 4 1941 1990 Harrow Middlesex The Continental Railway Circle ISBN 0 9521655 1 1 OCLC 35135033 External links Edit Wikimedia Commons has media related to Indian locomotive class WDM7 Ministry of Railways Railway Board IRFCA Indian Railways Locomotive Roster Changes Retrieved from https en wikipedia org w index php title Indian locomotive class WDM 7 amp oldid 1169315093, wikipedia, wiki, book, books, library,
