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[[File:TPTY JAT Humsafar.jpg|thumb|250px|A [[WAP 7]] class [[5 ft 6 in gauge railway|broad gauge]] [[Alternating current|AC]] [[electric locomotive]].]]
[[File:BRC WAP7.jpg|thumb|250px|A [[WAP 7]] class [[5 ft 6 in gauge railway|broad gauge]] [[Alternating current|AC]] [[electric locomotive]].]]
[[File:RTM WDM3A.jpg|thumb|250px|A WDM-3A [[5 ft 6 in gauge railway|broad gauge]] [[diesel locomotive]].]]
[[File:RTM WDM3A.jpg|thumb|250px|A WDM-3A [[5 ft 6 in gauge railway|broad gauge]] [[diesel locomotive]].]]
[[File:NMR train at Ketti 05-02-26 75.jpeg|thumb|250px|A [[Nilgiri Mountain Railway]] [[metre gauge]] class X [[steam locomotive]].]]
[[File:NMR train at Ketti 05-02-26 75.jpeg|thumb|250px|A [[Nilgiri Mountain Railway]] [[metre gauge]] class X [[steam locomotive]].]]

Revision as of 11:47, 16 January 2022

The Indian Railways primarily operates fleet of electric and diesel locomotives, along with several compressed natural gas (CNG) locomotives. Steam locomotives are operated on a few World Heritage Sites and also run occasionally as heritage trains. A locomotive is also known as a loco or more popularly as an engine. The country's first steam locomotive ran on the Red Hill Railway (built by Arthur Cotton to transport granite for road-building) from Red Hills to the Chintadripet bridge in Madras in 1837.[1]

Classification

Locomotives were classified by track gauge, motive power, function and power (or model number) in a four- or five-letter code. The first letter denotes the track gauge. The second letter denotes motive power (diesel or electric), and the third letter denotes use (goods, passenger, mixed or shunting). The fourth letter denotes a locomotive's chronological model number.

In 2002, a new classification system was adopted. For newer diesel locomotives, the fourth letter denotes their horsepower range. Not all diesel locomotives were reclassified, and the fourth letter continues to denotes their model number.

A locomotive may have a fifth letter, generally denoting a technical variant, subclass or subtype: a variation in the basic model or series, or a different motor or manufacturer. Under the new system, the fifth letter further refines horsepower in 100-hp increments: A for 100 hp, B for 200 hp, C for 300 hp and so on. A WDP-3A is a 3,100 hp (2,300 kW) locomotive, and a WDM-3F is 3,600 hp (2,700 kW).

The system does not apply to steam locomotives, which are no longer used on main lines. They retain their original class names, such as M- or WP-class.

Syntax

  • First letter (gauge):
    • W – Broad gauge (wide) – 5 ft 6 in (1,676 mm)
    • Y – Metre gauge (yard) – 1,000 mm (3 ft 3+38 in)
    • Z – 2 ft 6 in (762 mm) narrow gauge
    • N – 2 ft (610 mm) narrow (toy) gauge
  • Second letter (motive power):
    • D – Diesel
    • C – DC electric (DC overhead line)
    • A – AC electric (AC overhead line)
    • CA – DC and AC (AC or DC overhead line); CA is considered one letter
    • B – Battery (rare)
  • Third letter (job type):

In WDM 3A, W denotes broad gauge; D denotes diesel power; M denotes mixed use (goods and passenger service), and 3A denotes 3,100 hp (2,300 kW) (3,000 + 100). In WAP 5, W is broad gauge; A is AC electric; P is passenger service, and 5 indicates that the locomotive is the fifth model used.

Broad-gauge (5 ft 6 in) locomotives

Electric

AC electric

Broad-gauge AC electric classification codes are:

  • WAM – Wide AC electric mixed
  • WAP – Wide AC electric passenger
  • WAG – Wide AC electric goods
  • WAU - Wide AC electric multiple units

AC Mixed class (WAM Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WAM-1 KraussMaffei Group, Krupp, SFAC, La Brugeoise & Nivelle (50 cycles European group) B-B 100 1959-1960 3010 HP Retired 1 First mainline AC electric locomotive File:WAM-1.jpg
WAM-2 Mitsubishi Bo-Bo 36 1960-64 2910 HP Retired None
WAM-3 Mitsubishi Bo-Bo 2 1964 2400 HP Retired None
WAM-4 CLW Co-Co 500 1970-1983 3850 HP Retired 6 Earmarked File:AJJ WAM4.jpg

AC Passenger class (WAP Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WAP-1 CLW Co-Co 65 1980-1996 3900 HP In service 1 Earmarked File:AJJ WAP1.jpg
WAP-2 Mitsubishi Bo-Bo 2 or 3, all rebuilt from WAM-2 1960–1964 2910 HP Retired None
WAP-3 CLW Co-Co 9, all rebuilt from WAP-1 1987-1988 3900 HP Retired/ In service as WAP-1 None
WAP-4 CLW Co-Co 778 1993-2015 5350 HP In service File:BRC WAP4.jpg
WAP-5 ABB / CLW Bo-Bo 223 1995– present 6000 HP In service File:BRC WAP5 30177.jpg
WAP-6 CLW Co-Co 17 1995-1998 5350 HP Retired/ In service as WAP-4
WAP-7 CLW/BLW/DLMW Co-Co 1412 2000– present 6350 HP In service File:BRC WAP-7.jpg

AC Goods class (WAG Series)

Name Manufacturer Wheel

Arrangement

Quantity

Built

Built year(s) H.Power Current Status Preserve Picture
WAG-1 Niv./SFAC/

CLW

B-B 112 1963-1966 2930 HP Retired 1 unit
WAG-2 Hitachi /Toshiba /Mitsubishi B-B 45 1964-1965 3450 HP Retired None
WAG-3 Henschel/CLW B-B 10 1965 3300 HP Retired None
WAG-4 CLW B-B 186 1967-1969 3590 HP Retired None
WAG-5 CLW/BHEL Co-Co 1196 1978-1998 4360 HP In service 1 unit File:BL WAG5 TWINS.jpg
WAG-6A ASEA Bo-Bo-Bo 6 1988-1989 6110 HP In Service 1 unit
WAG-6B Hitachi Bo-Bo-Bo 6 1988 6110 HP In service 1 unit
WAG-6C Hitachi Co-Co 6 1988 6110 HP In service 1 unit
WAG-7 CLW/BHEL Co-Co 1970 1990-2015 5350 HP In service 1 unit earmarked File:BZA WAG7 28543.jpgFile:Valsad WAG7.jpg
WAG-8 BHEL Co-Co 1 1990 5000 HP Retired/ Never went into service None
WAG-9 ABB / CLW/BHEL/BLW Co-Co[2] 2605 1996–present 6125 HP In service File:TATA WAG9HC.jpg
WAG-10 BLW Co-Co-Co-Co 1 2018–present 10000 HP In service File:BNDM WAGC3-WAG10.jpg
WAG-11 BLW Co-Co-Co-Co/Co-Co 4 2018–present 12000 HP Undergoing Trials File:WAG-11 29001.jpg
WAG-12 Alstom Bo-Bo-Bo-Bo 145 2017–present 12000 HP In service File:SRE WAG12B 60064.jpg

AC electric multiple unit (WAU series)

DC electric

These locomotives, no longer in use, were used only in and around Mumbai with 1.5 kV DC power. All sections of Central Railway, including Thane to Mumbai CST (Main Line), Nerul to Thane (Trans-Harbour Line), Vadala Road to Mahim (Harbour Line, connecting Central and Western Railway) and Panvel to Mumbai CST (Harbour Line) have been converted to 25 kV AC.

Broad-gauge DC electric classification codes are:

  • WCM – Wide DC electric mixed
  • WCP – Wide DC electric passenger
  • WCG – Wide DC electric goods
  • WCU - Wide DC electric multiple unit

DC Mixed class (WCM Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WCM-1 English Electric / Vulcan Foundry Co-Co 7 1954-1955 3700 HP Retired 1 India's first electric Co-Co locomotive
WCM-2 English Electric / Vulcan Foundry Co-Co 12 1956-1957 3120 HP Retired None File:WCM 2.jpg
WCM-3 Hitachi Co-Co 3 1958 3600 HP Retired None File:WCM-3.jpg
WCM-4 Hitachi Co-Co 7 1960 4000 HP Retired None
WCM-5 CLW Co-Co 21 1961-1963 3700 HP Retired 1 unit File:WCM 5.jpg
WCM-6 CLW Co-Co 2 1995 5000 HP In service Converted to 25 kV AC operation

DC Passenger class (WCP Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WCP-1 SLM /

MetroVick

2-Bo-A1 22 1928-30 2160 HP Retired 1 unit First electric locomotive of India
WCP-2 SLM /

MetroVick

2-Bo-A1 1 1938 2160 HP Retired 1 unit
WCP-3 Hawthorn Leslie, Marconi Company 2-Co-2 1 1928 2250 HP Retired None
WCP-4 Hawthorn Leslie, BBC 2-Co-2 1 1928 2390 HP Retired None

DC Goods class (WCG series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WCG-1 SLM /

MetroVick

/Vulcan Foundry

C+C 41 1928-1929 2600-2890 HP Retired 2 units
WCG-2 SLM /

MetroVick

Co-Co 57 1970-1976 4200 HP Retired 2 units

DC electric multiple unit (WCU series)

WCU 1 to WCU 15 electric multiple units (EMU) were used in the Mumbai region.

Dual (DC and AC)

Broad-gauge DC and AC electric classification codes are:

  • WCAM - Wide DC and AC electric mixed
  • WCAG - Wide DC and AC electric goods

Dual Current Mixed class (WCAM Series)

These locomotives are used only in the Mumbai area. They were built to prevent the need to change locos. Mixed locomotives are:

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Comments Picture
WCAM-1 CLW Co-Co 54 1975-1979
  • 2930 HP DC
  • 3640 HP AC
Retired First mainline with AC/DC electric locomotive and the only Indian electric loco with reversed pantographs
WCAM-2 BHEL Co-Co 20 1995-1996
  • 3780 HP DC
  • 4720 HP AC
In service
WCAM-3 BHEL Co-Co 53 1997-1998
  • 4600 HP DC
  • 5000 HP AC
In service

Dual Current Goods class (WCAG Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Comments Picture
WCAG-1 BHEL Co-Co 12 1999-2000
  • 4600 HP DC
  • 5000 HP AC
In service The only class of the WCAG series File:KYN WCAG1 twins.jpg

Battery

Broad-gauge battery classification code is:

  • WBCS - Wide battery DC electric shunter
  • WCAS - Wide DC(Battery) AC Shunter [3]

Battery shunter class (WBCS series)

In 1927, English Electric and WBC built two shunters for yard use in Bombay with Bo-Bo bogies. They were of the WBCS class. Rated at 240 hp (180 kW), they weighed 58 tons. These are now preserved in National Rail Museum in Delhi. They were charged using the 1500 V DC OHE which was available there.[4]

Battery shunter class (WCAS series)

The locomotive is classified as WCAS. Where W means Wide Gauge, C means DC(Battery), A means AC power, S means Shunting.

Dual-mode

Broad-gauge diesel and electric classification code is:

  • WDAP - Wide Diesel and AC electric passenger

Dual mode passenger (WDAP series)

These locomotives are used on routes that can run on both electrified and non-electrified tracks. Their main purpose is to prevent the need of engine change in electrified routes. Passenger locomotives are:

Name Manufacturer Wheel Arrg Quantity Built Built year(s) Power Current Status Comments Picture
WDAP-5 BLW Co-Co 1 2019–present
  • 4500 HP Diesel
  • 5500 HP AC
Undergoing Trails India's first dual-mode locomotive File:WDAP5 71000.jpg

Diesel

Broad-gauge diesel classification codes are:

  • WDM – Wide diesel mixed
  • WDP – Wide diesel passenger
  • WDG – Wide diesel goods
  • WDS – Wide diesel shunter
  • WCDS – Wide converted diesel shunter
  • DEMU - Diesel electric multiple unit
  • DHMU - Diesel Hydraulic multiple unit

Mixed class (WDM Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WDM-1 ALCO Co-Co 100 1957-1959 1950 HP Retired 1 First mainline diesel locomotive
WDM-2 ALCO/ BLW Co-Co 1440 1962–1998 2600 HP In service 9 A few still in service
WDM-2G BLW Co-Co 2 2013 2400 HP In Service File:WDM-2G 80000.jpg
WDM-3 Henschel Bo-Bo 8 1970 2500 HP Retired None File:WDM-3.jpg
WDM-3A BLW Co-Co 1402 1994–1998 3100 HP In service 1 Earmarked File:RTM WDM3A.jpg
WDM-3B BLW Co-Co 8, all rebuilt back to WDM-3D 2005-2006 3100 HP In service All rebuilt back to WDM-3D
WDM-3C BLW Co-Co 10 2002 3300 HP In service None All rebuilt back to WDM-3A
WDM-3D BLW Co-Co 500 2003-2013 3300 HP In service File:VTA WDM3D.jpg
WDM-3E BLW Co-Co 8 2008 3500 HP In service
WDM-3F BLW Co-Co 3 2008 3600 HP In service
WDM-4 GM Co-Co 72 1962 2600 HP Retired 2
WDM-6 BLW Bo-Bo 2 1981-1982 1350 HP Retired 2 Both units earmarked for preservation File:WDM-6.jpg
WDM-7 BLW Co-Co 15 1987–1989 2000 HP In service 1 Earmarked Currently used for shunting uses only

Passenger class (WDP Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WDP-1 BLW & ALCO Bo-Bo 69 1995–1999 2300 HP In service
WDP-3A BLW & ALCO Co-Co 69 1998–2002 3100 HP In service
WDP-4 EMD

& BLW

Bo1-1Bo 100 2002–2011 4000 HP In service
WDP-4B EMD

& BLW

Co-Co 86 2010–2014 4500 HP In service
WDP-4D EMD

& BLW

Co-Co 525 2010–2018 4500 HP In service

Goods class (WDG Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WDG-3A BLW Co-Co 1998 1995–2010 3100 HP In service File:KYN WDG3A.jpg
WDG-3B BLW Co-Co 4 2004 3200 HP In service
WDG-3C BLW Co-Co 1 2001 3300 HP In service
WDG-3D BLW Co-Co 1 2001 3400 HP In service
WDG-4 EMD/BLW Co-Co 1188 1999–2012 4500 HP In service
WDG-4G GE Co-Co 322 2017–present 4500 HP In service File:ROZA WDG4G.jpg
WDG-4D BLW Co-Co 583 2013–2018 4500 HP In service
WDG-5 BLW Co-Co 7 2012-2017 5500 HP In service File:SBI WDG5.jpg
WDG-6G GE Co-Co 53 2018–present 6000 HP In service File:ROZA WDG6G.jpg

Shunter Class (WDS Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
WDS-1 GE Bo-Bo 15 1944-1945 386 HP Retired 1 India's first diesel locomotive
WDS-2 Kraus

Maffei

C 30 1954-1955 440 HP Retired None
WDS-3 Maschi-

nenbau Kiel

C 7 1961 618 HP Retired None File:WDS-3.jpg
WDS-4 CLW C 27 1968-1969 600 HP Few are still in service 4 A few still in service
WDS-4A CLW C 5 1968 660 HP Retired
WDS-4B CLW C 450 1969 700 HP Retired
WDS-4C CLW C 7 1976-78 700 HP Retired File:WDS-3.jpg
WDS-4D CLW C 120 1984-97 700 HP Retired
WDS-5 ALCO/BLW Co-Co 21 1967 1065 HP In service None A few still in service
WDS-6 BLW Co-Co 270 1975– 1400 In service 2 Earmarked
WDS-6AD BLW Co-Co 270 1975– 1400 In service 2 Earmarked File:SSB WDS6.jpg
WDS-8 CLW Bo-Bo 5 1979-1982 800 HP Retired None File:WDS-8.jpg
Tan-and-green train
Newer red train
Indian Railways DHMU (left) and DEMU

Converted shunter class (WCDS series)

The WCDS6, a YDM4 locomotive, was converted to broad gauge by the Golden Rock Railway Workshop for large industrial companies; the first one was delivered to RITES. New water and air lines were added, the control stand was modified, and it has a dual brake system.

Diesel multiple units

File:ICF DEMU.jpg
Diesel Electric Multiple Unit(DEMU)

A few routes have DMU service. Depending on their transmission system, they are classified as DEMU (diesel-electric transmission) or DHMU (diesel-hydraulic transmission). There is diesel railcar service (known as railbus) in several areas.

Steam

Steam engine at outdoor museum
More-modern steam locomotive
Old red-and-black steam locomotive
Large steam locomotive
Indian Railways locomotives: (clockwise from upper left) Preserved HPS, NRM WP 7200, B-26 and preserved YP-class

Nineteenth-century railway companies ordered custom-built locomotives, usually from British manufacturers. The multiplicity of similar-but-not-identical designs increased manufacturing cost and slowed production. During the 1890s, British manufacturers were busy and Indian railway companies looked to Germany and the United States for locomotives.[5] Engines used were:

  • Bengal Nagpur Railway:
  • Bombay, Baroda and Central India Railway:
    • BB&CI class P: 4-6-2
    • Class A: 2-4-0T, probably an Atlantic; was at the Palej shed.
    • Class U36: 0-4-2, used on hauling suburban trains in Bombay
    • Class D1: 4-4-0; one was named Princess May.
    • Class M: 4-6-2 (probably modified)
  • East Indian Railway Company:
  • Great Indian Peninsula Railway:
    • GIPR classes Y1, Y2, Y3, and Y4: 0-8-4T. Used on Thal Ghat as bankers for pushing trains up the Western Ghats.
    • GIPR Class F and F3: 2-6-0
    • GIPR class J1: 0-6-0
    • Class D4: 4-6-0; one is named Hero.
    • Class D5: 4-6-0 passenger locomotive
    • Class E1: 4-4-2 Atlantic built by the North British Locomotive Company in 1907–8. Rebuilt with a superheater between 1925 and 1928.
    • Class T: Tank locomotive used for hauling Mumbai suburban trains
    • Class Y: 2-8-4T
    • Crane tank: 0-6-0T; one is preserved at the National Rail Museum in New Delhi.
  • Madras and Southern Mahratta Railway:
    • M&SM class V: 4-4-0; one is preserved.
    • Class BTC: 2-6-4T, based on BESA specifications
    • Class T: 0-4-2; one is preserved in Madras.
  • Nizam's Guaranteed State Railway:
    • NSR class A: 2-6-0T (No. 48, probably an Atlantic) preserved at the National Rail Museum, Delhi.
  • North Western State Railway:
    • Class EM: 4-4-2 (probably modified); one is preserved at the National Rail Museum [6]
    • NWR class GAS: 2-6-2+2-6-2 Garratt; one built in 1925, and retired in 1937.
    • NWR class P: 2-4-0
    • Class E1: 4-4-2
    • Class N1: 4-8-0
  • Oudh and Rohilkhand Railway:
    • Class B26: 0-6-0; one is preserved at the National Rail Museum.
  • Others:
    • Class B: 2-6-0
    • Class E: 2-4-0
    • Class F: 2-8-2, built between 1926 and 1950 by Nasmyth Wilson for service on Central Railway (CR).
    • Class G: 2-6-0, probably intended for freight
    • Class NA2
    • Class PTC: 2-6-4T, owned by Northern Railway (NR); probably a converted passenger locomotive
    • Class Y2: 2-8-2T, reclassified L2
    • Phoenix: 0-4-0T; one is at the National Rail Museum.
    • Ramgotty: 2-2-0T; the National Rail Museum's oldest locomotive, it was converted to broad gauge.
    • Sultan, Sahib and Sindh: Hauled the train from VT to Thana in 1853.

Designs

Steam locomotive in a museum
Vulcan Foundry class SPS, 1911

After acrimonious words in The Times and Parliament, the British Engineering Standards Committee (later the British Engineering Standards Association) began designing a series of locomotives for use by Indian railways. The first two designs emerged in 1903: a 4-4-0 passenger and 0-6-0 goods. They were revised in 1905 and 1906 with additional heavier, more-powerful locomotives:

  • Class SP: Standard passenger (4-4-0)
  • Class SG: Standard goods (0-6-0)
  • Class PT: Passenger tank (2-6-4T)
  • Class HP: Heavy passenger (4-6-0)
  • Class AP: Atlantic passenger (4-4-2)
  • Class HG: Heavy goods (2-8-0)
  • Class HT: Heavy tank (2-8-2T)

These advisory BESA designs were customized by the railway companies, which used different classification systems; only the state-operated railways used the class designations SP, SG, PT, HP, AP, HG and HT. When superheating was accepted, superheated versions were classified SPS, SGS and so on (if built with superheaters) and SPC, SGC and so on (if converted from saturated to superheated).

Manufacturer's photo
Similar to first photo, without manufacturer documentation
Indian Railways locomotives: 1935 XP class (left) and 1927 XB class

After World War I, larger and more-powerful locomotives were designed by British consulting engineers for the Indian government. They began to appear in 1927:

Class XF, built by Beyer, Peacock & Co in Manchester for East Bengal Railway
  • Class XF: light shunting 0-8-0 design, 18-ton axle load
  • Class XG: heavy shunting 0-8-0 design, 23-ton axle load
  • Class XH: 4-cylinder 2-8-2, 28-ton axle load; none were built
  • Class XP: experimental passenger 4-6-2, 18.5-ton axle load
  • Class XS: experimental 4-cylinder 4-6-2, 21.5-ton axle load
  • Class XT: light tank 0-4-2T, 15-ton axle load

During World War II, large numbers of 2-8-2 locomotives were acquired from the United States and Canada and classified AWD and CWD. The Baldwin Locomotive Works adapted the USATC S160 Class locomotive design for India, and it became class AWC. Sixty broad-gauge locomotives were built in 1944 as part of an order of 180 S160 engines. In addition to modified frame spreaders, axles, cylinders, and cab, the Indian locomotives had a turbo generator and electric lighting (not included in the standard European design). Many parts (including boilers) were identical to those in standard-gauge locomotives.[7]

Steam engine in transit
Steam engine at an outdoor museum
Black locomotive under cover
Locomotive on above-ground display
(clockwise from upper left) WL- and YG-class locomotives; an M2-162, and a display engine in Guntur Division

Although new classes were designed shortly before the war, many did not enter service until the post-war period. The new classes were indicated by the change of broad-gauge prefix from X to W, and plans were implemented to begin manufacturing locomotives in India. The new classes were:

All broad-gauge steam locomotives in India have been withdrawn from normal service, with only occasional steam specials continuing to operate.

Metre-gauge (3 ft 3⅜ in) locomotives

Electric

Metre-gauge electric classification codes are:

  • YAM – Metre gauge AC electric mixed
  • YCG – Metre gauge DC electric goods
  • YAU – Metre gauge AC electric multiple units

AC mixed class (YAM Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
YAM-1 Mitsubishi B-B 20 1964-66 1740 Retired 2 units Twenty 1,740 hp (1,300 kW) locomotives, imported from Japan, were in service until 2004 in the Chennai area.

DC goods class (YCG series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
YCG-1 HL / EE Bo+Bo 4 1930 640 Retired 2 units Among India's earliest electric locomotives, the class was imported to serve the Chennai area in the early 1930s

AC multiple units (YAU series)

These were India's first EMU services introduced around 1920 in the Chennai area.[8]

Diesel

Metre-gauge diesel classification code is:

  • YDM – Metre gauge diesel mixed

Mixed class (YDM Series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
YDM-1 NBL B-B 20 1955-56 700 Retired India's first metre-gauge diesel locomotive
YDM-2 CLW B-B 41 1986-90 700 Retired None File:YDM-2.jpg
YDM-3 GM B-B 30 1961-62 1390 Retired 1 unit File:YDM-3.jpg
YDM-4 ALCO/BLW Co-Co 541 1961–1993 1400 In service Many
YDM-5 GM C-C 25 1964 1390 Retired 2 units

Steam

  • Nilgiri Mountain Railway X class
  • BESA designs:
    • Passenger (4-6-0)
    • Mixed (4-6-0)
    • Goods (4-8-0)
    • Tank (2-6-2T)
  • Indian Railway Standards designs of the late 1920s
    • Class YA: 4-6-2 with 9-ton axle load (none built)
    • Class YB: 4-6-2 with 10-ton axle load (161 built for India and 50 for Burma)
    • Class YC: 4-6-2 with 12-ton axle load (15 built for India and 13 for Burma)
    • Class YD: 2-8-2 with 10-ton axle load (171 built for India, 61 for Burma, and 25 for East Pakistan)
    • Class YE: 2-8-2 with 12-ton axle load (none built)
    • Class YF: 0-6-2 with 8-ton axle load; later examples were 2-6-2 (111 built for India)
    • Class YK: 2-6-0 version of the 2-6-2 YF, 8-ton axle load (25 built for India)
    • Class YT: 0-4-2T with 8-ton axle load (2 built for India)
  • Wartime designs:
  • Indian Railway Standards post war designs
    • Class YL: 2-6-2 mixed traffic locomotive with 8-ton axle load (264 built 1953–1957)
    • Class YG: 2-8-2 goods locomotive with 10½-ton axle load (1074 built 1949–1972)
    • Class YP: 4-6-2 passenger locomotive with 10½-ton axle load (871 built 1952–1968)
    • Class YM 2-6-4T with 9-ton axle load (12 built 1956)

Narrow-gauge (2 ft 6 in and 2 ft) locomotives

Diesel

Narrow-gauge diesel classification codes are:

  • ZDM - Narrow gauge 2 ft 6 in diesel mixed
  • NDM - Narrow gauge 2 ft diesel mixed

Mixed class (ZDM series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
ZDM-1 Arn. Jung B+B 5 1955 290 Retired
ZDM-2 Maschi-nenbau Kiel B-B 25 1964-65 700 Retired Blue-and-white loco
ZDM-3 CLW B-B 40 1970-82 700 In service Tan-and-orange loco
ZDM-4/4A CLW 1-B-B-1 10/39 1975-77/1982-90 700 In service Head-on close-up of a loco
ZDM-5 CLW B-B 41 1989+ 450 In service Two-tone blue and gold loco

Mixed class (NDM series)

Name Manufacturer Wheel

Arr

Quantity

Built

Built year(s) Power Current Status Preserved units Comments Picture
NDM-1 Arn. Jung B+B 7 1955 290 In service
NDM-5 CLW B-B 11 1987-89 450 In service
NDM-6 (SAN) Engg. and Loco Co. B 6 1997 335 In service

Steam

2 ft 6 in

  • Barsi Light Railway:
    • Class A: 0-8-4T
    • Class B: 4-8-4T
    • Class C: 0-6-0ST
    • Class D: 0-4-0
    • Class E: Sentinel railcars
    • Class F: 2-8-2
    • Class G: 4-6-4
  • Indian Railway Standards:
    • Class ZA: 2-6-2 with 4.5-ton axle load (none built)
    • Class ZB: 2-6-2 with 6-ton axle load
    • Class ZC: 2-8-2 with 6-ton axle load (none built)
    • Class ZD: 4-6-2 with 8-ton axle load (none built)
    • Class ZE: 2-8-2 with 8-ton axle load
    • Class ZF: 2-6-2T with 8-ton axle load

2 ft

Black locomotive
DHR B class locomotive in Darjeeling shed (1979)

Battery

Narrow-gauge battery classification code is:

  • NBM - Narrow gauge 2 ft battery mixed

Mixed class (NBM series)

  • NBM-1: Designed by BHEL in 1987

See also

References

Notes

  1. ^ "[IRFCA] India's First Railways". www.irfca.org.
  2. ^ "WAG9 Co-Co".
  3. ^ "Battery Powered Loco WCAS".
  4. ^ "IRFCA".
  5. ^ Hughes 1979, p. 17
  6. ^ "Pakistan Railways steam locomotive | Science Museum Group Collection". collection.sciencemuseumgroup.org.uk. Retrieved 26 May 2021.
  7. ^ Baldwin Locomotive Works drawing index and bill of materials for special order 43306, locomotive design 2-8-0 19S, numbers 666 to 845 for the U.S. Government, War Department.
  8. ^ Historic Chennai 9 car Meter Gauge EMU with 3 power cars, archived from the original on 21 December 2021, retrieved 1 June 2021

Bibliography