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{{Infobox locomotive
| name = WDM-2G
| powertype = Diesel-electric
| image = File:WDM-2G 80000.jpg
| alt =
| caption = Itarsi (now Vatva) based WDM-2G resting outside Itarsi Jn.
| builder = [[Diesel-Loco Modernisation Works]], [[Patiala]]
| ordernumber =
| serialnumber =
| builddate = 2013
| totalproduction = 2
| rebuilder =
| rebuilddate =
| numberrebuilt =
| Britishclass = [[Co-Co locomotives|Co-Co]]
| uicclass = [[Co′Co′]]
| gauge = {{track gauge|1676mm}}
| trucks =
| bogies = [[American Locomotive Company|ALCo]] high adhesion bogie
| wheeldiameter = {{convert|1092|mm|ftin|0|abbr=on}}
| trailingdiameter =
| minimumcurve =
| wheelbase =
| length =
| width =
| height =
| axleload = {{convert|19.5|t|ST lt|abbr=on}}
| weightondrivers =
| locoweight = {{convert|117|t|ST lt|abbr=on}}
| fueltype = [[Diesel fuel|Diesel]]
| fuelcap =
| lubecap =
| coolantcap =
| sandcap =
| consumption =
| primemover = 3 of Cummins QSK-19
| rpmrange =
| enginetype = 3 engines; each of 4-Cycle 6-Cyl [[diesel engine]]
| aspiration = [[Turbo-supercharger|Turbo-supercharged]]
| displacement =
| alternator =
| generator =
| tractionmotors = TM4907 DC traction motors (6; 3 on each bogie)
| cylindercount = 6 for each engine, 3 engines
| cylindersize =
| transmission = [[Diesel-electric transmission]]
| multipleworking = possible
| maxspeed = *'''mainline''' : {{convert|120|km/h|0|abbr=on}}
*'''other''' : {{convert|105|km/h|0|abbr=on}}
| poweroutput = {{convert|2400|HP|kW|abbr=on}}
| tractiveeffort = {{convert|37.2|t|kg|0|abbr=on}}
| factorofadhesion = 0.27
| trainheating =
| locobrakes = [[Railway air brake|Air]], Dynamic brake, Parking brake
| locobrakeforce = {{convert|19|t|kg|abbr=on}} for dynamic brakes
| trainbrakes = [[Railway air brake|Air]] (IRAB-1; Indian Railway Air Brake - 1)
| safety = Vigilance Control device (VCD), emergency brake control valve, flasher (one both ends)
| operator = [[Indian Railways]]
| operatorclass =
| powerclass =
| numinclass =
| fleetnumbers = '''80000''' & '''80001'''
| officialname =
| nicknames =
| axleloadclass =
| locale = [[Western Railways]]
| deliverydate = 2013
| firstrundate = 2012
| lastrundate =
| retiredate =
| withdrawndate =
| preservedunits =
| restoredate =
| scrapdate =
| currentowner =
| disposition = active
| notes = Sources: [https://rdso.indianrailways.gov.in/works/uploads/File/WDM2G%20Final%20speed%20certificate1.pdf Speed certificate], [https://rdso.indianrailways.gov.in/works/uploads/File/150408_FinalDraft_Spec_MP.0.2402.23_2400_1400%20BHP%20BG_Multigenset.pdf final draft specifications]
}}

The '''WDM-2G''' is a class of [[Diesel–electric transmission|diesel electric]] [[genset locomotive]] used in [[Indian Railways]]. It is one of the rarest locomotives in India with only two units being produced by [[Diesel-Loco Modernisation Works]]. The locomotives were produced with an intention of being fuel efficient and to be used for light to medium duties such as short passenger runs along with occasional [[Shunting (rail)|shunting]]. They are one of the only two classes of locomotives in India to feature multiple prime movers, the other example being WDS-6G, which was designed solely for shunting. They have a rated power of 2,400 [[Horsepower|HP]].

== Development ==
Diesel locomotives had been the backbone of the Indian Railways. Within the diesel fleet, the [[American Locomotive Company|ALCOs]], [[Indian locomotive class WDM-2|WDM-2]], later upgraded to [[Indian locomotive class WDM-3A|WDM-3A]] and other variants, were, and to some extent even continue to be, the major workhorses. This was before the, relatively recent, push of the Railways for complete electrification of the network. Being the major user of diesel locomotives, naturally, a large chunk of railway money was spent to afford diesel fuel, of which the railways were the number one consumer.<ref>{{Cite web|title=Railways to introduce fuel-efficient multi-genset locomotives|url=https://www.thehindubusinessline.com/economy/logistics/railways-to-introduce-fuel-efficient-multi-genset-locomotives/article23101698.ece|last=Das|first=Mamuni|website=@businessline|language=en|access-date=2020-05-26}}</ref> Thus, with an aim to minimise pollution and fuel consumption, the development for WDM-2G, locos started. The specifications laid down by RDSO demanded the locomotive to be fuel efficient by using multiple engines (prime movers) which could be turned off or on depending on the load that the locomotive was pulling.<ref>{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/150408_FinalDraft_Spec_MP.0.2402.23_2400_1400%20BHP%20BG_Multigenset.pdf|title=RDSO specifications for genset locomotive|publisher=[[Research Design and Standards Organisation|RDSO]]}}</ref>

It was planned that the initial two locomotives would be produced by Diesel-Loco Modernisation Works, Patiala (DLMW) while the remaining units would be built at a factory in Sherpur of Sehore district. The factory was supposed to be a joint a venture between Daulat Ram Engineering Services, a railway component manufacturer, and [[United States|US]]-based locomotive re-manufacturer [[National Railway Equipment Company|National Railway Equipment Co]]. However, further reports about the plant have not been published and information has been scarce.

== Performance and specifications ==
The WDM-2G are inspired by the hundreds of gensets in service over [[North America]]. Being the first locomotives to be built by [[Diesel-Loco Modernisation Works]], they have certain features which are not found on regular locomotives in Indian Railways such as extensive use of marker and indication lamps and a cab structure inspired by the ones found on [[United States|American]] locomotives like [[EMD SD40-2]]. The locos, for the first time in India, featured K5LA multi chime horn, which proved to be a little quieter for Indian operations.

On the inside, the locomotive features 3 prime movers, each of [[Cummins]] QSK-19 type which is a [[Engine configuration|6 cylinder]] [[Four-stroke engine|four stroke engine]] producing a power of 800 HP. The locomotive retained the ALCo high adhesion bogie from the WDM-2/3 locomotives but was moving by TM4907 for each axle which are a type of [[direct current]] [[traction motor]]. The locomotive has a weight of 117 tonnes distributed over 6 axles making an axle load of 19.5 tonnes/axle. The low weight limited the tractive effort to 37.2 tonnes force while allowing a speed up to 120kmph. Apart from that, the locomotives have dynamic braking, conventional braking and vigilance control device for driver alertness and safety.<ref name=":0">{{Cite book|url=https://rdso.indianrailways.gov.in/works/uploads/File/WDM2G%20Final%20speed%20certificate1.pdf|title=RDSO speed certificate for WDM-2G|publisher=[[research Design and Standards Organisation|RDSO]]}}</ref>

The major advantage of these locomotives operationally offer is the reduced fuel consumption and lower emission. They reportedly consume 20% lesser fuel than locomotives of same specifications and power in the Railways. This also means that the resultant [[Nitrous oxide|nitrous oxides emission]] is lesser in these locos making them more environmentally friendly than the previous diesel locomotives of Indian Railways.<ref>{{Cite web|title=Railways introduce fuel-efficient multi-genset locomotives|url=https://www.firstpost.com/india/railways-introduce-fuel-efficient-multi-genset-locomotives-1049601.html|website=Firstpost|access-date=2020-05-26}}</ref>

== Service and future ==
Two locomotives numbered 80000 and 80001 entered service in 2013 after [[Research Design and Standards Organisation|RDSO]] oscillation trials which certified them to be fit for {{Convert|120|km/h|mph|abbr=}} on mainline tracks and {{Convert|105|km/h|mph|abbr=}} on regular tracks.<ref name=":0" /> The locomotives were initially allocated to [[Itarsi Junction railway station|Itarsi (ET) loco shed]] of [[West Central Railway zone|West Central Railway]], however, in 2019, they were moved to Diesel loco shed [[Diesel Loco Shed, Vatva|Vatva (VTA)]] of [[Western Railway zone|Western Railway]] where they are currently used for shunting purposes.

Despite the initial fanfare within the media, the locomotive did not enter serial production for Indian Railways. The major reasons for its failure can be attributed to the fact that the requirement of low powered locomotives has become quite low due to the long and heavy trains run in the country, the exception being shunting duties, for which plenty locos are available. The chief reason why production was not continued was due to the persuasion of [[Railway electrification system|route electrification]] in Indian Railways. Due to this the Indian Railways was not very keen on adding a whole new fleet of diesel locomotives, which even after being fuel efficient for a diesel, were still inferior to the electric locomotives, both in efficiency and power.

== Locomotive shed ==
The only two units ever built were allocated to [[Itarsi Junction railway station|Itarsi locomotive shed]] before being transferred to [[Diesel Loco Shed, Vatva|Vatva shed]], [[Western Railway zone|Western Railway]].
{| class="wikitable"
|-
! Zone !! Name !! Shed Code !! Quantity
|-
| [[Western Railway zone|Western Railway]] || [[Vatva railway station|Vatva]] || VTA || 2
|-
| colspan="3" |'''Total Locomotives Active as of 18-10-2021'''<ref>{{cite web|url=https://www.irfca.org/apps/locos/list?list_type=named|title = IRFCA}}</ref> || 2
|}

==See also==

* [[Rail transport in India#History]]
* [[List of diesel locomotives of India]]
* [[Rail transport in India]]
*[[Indian locomotive class WDM-2]], a locomotive of the same series

==References==

===Notes===
{{reflist}}

===Bibliography===
{{refbegin}}
*{{Hughes-IndianLocos4}}
{{refend}}

{{Broad gauge locomotives of India |state=collapsed}}

{{DEFAULTSORT:WDM-2G}}
[[Category:Diesel-electric locomotives of India|M-2G]]
[[Category:Co-Co locomotives]]
[[Category:Banaras Locomotive Works locomotives]]
[[Category:Railway locomotives introduced in 2013]]
[[Category:5 ft 6 in gauge locomotives]]

Indian locomotive class WDM-2G - Revision history

Ajendra69: created page will be updated soon

Ajendra69: created page
will be updated soon