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	<id>https://en.bharatpedia.org/w/index.php?action=history&amp;feed=atom&amp;title=Nilgiri_Mountain_Railway_X_class</id>
	<title>Nilgiri Mountain Railway X class - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://en.bharatpedia.org/w/index.php?action=history&amp;feed=atom&amp;title=Nilgiri_Mountain_Railway_X_class"/>
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	<updated>2026-08-18T13:21:06Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://en.bharatpedia.org/w/index.php?title=Nilgiri_Mountain_Railway_X_class&amp;diff=445356&amp;oldid=prev</id>
		<title>imported&gt;...found 1654.: fixes</title>
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		<updated>2026-01-22T03:11:33Z</updated>

		<summary type="html">&lt;p&gt;fixes&lt;/p&gt;
&lt;a href=&quot;//en.bharatpedia.org/w/index.php?title=Nilgiri_Mountain_Railway_X_class&amp;amp;diff=445356&amp;amp;oldid=149336&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>imported&gt;...found 1654.</name></author>
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	<entry>
		<id>https://en.bharatpedia.org/w/index.php?title=Nilgiri_Mountain_Railway_X_class&amp;diff=149336&amp;oldid=prev</id>
		<title>106.200.239.114: /* In Bollywood */</title>
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		<updated>2021-06-19T03:35:49Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;In Bollywood&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Infobox locomotive&lt;br /&gt;
| name             = [[Nilgiri Mountain Railway]] X class&lt;br /&gt;
| powertype        = Steam&lt;br /&gt;
| image            = NMR 37385 in Delhi 05-02-17 M49.jpeg&lt;br /&gt;
| alt              = Black locomotive with a blue cab&lt;br /&gt;
| caption          = Nilgiri Mountain Railway locomotive No.37385, preserved in the Delhi Railway Museum&lt;br /&gt;
| designer         = &lt;br /&gt;
| builder          = [[Swiss Locomotive and Machine Works]], Winterthur, Switzerland (17)&amp;lt;br&amp;gt;[[Golden Rock Railway Workshop]], [[Golden Rock, Tiruchirappalli]], [[India]] (6)&lt;br /&gt;
| ordernumber      = &lt;br /&gt;
| serialnumber     = &lt;br /&gt;
| buildmodel       = &lt;br /&gt;
| builddate        = 1914, 1920, 1925, 1952, 2011-2014, 2020-2021&lt;br /&gt;
| totalproduction  = 23&lt;br /&gt;
| rebuilder        = [[Golden Rock Railway Workshop|Ponmalai Goldenrock (G.O.C.)]]&lt;br /&gt;
| rebuilddate      = &lt;br /&gt;
| numberrebuilt    = &lt;br /&gt;
| whytetype        = [[0-8-2T]]&lt;br /&gt;
| uicclass         = &lt;br /&gt;
| gauge            = {{RailGauge|1000mm|allk=on}}&lt;br /&gt;
| driverdiameter   = {{convert|815|mm|in|2|abbr=on}}&lt;br /&gt;
| trailingdiameter = &lt;br /&gt;
| minimumcurve     = &lt;br /&gt;
| wheelbase        = &lt;br /&gt;
| length           = &lt;br /&gt;
| width            = &lt;br /&gt;
| height           = &lt;br /&gt;
| axleload         = &lt;br /&gt;
| weightondrivers  = &lt;br /&gt;
| locoweight       = &lt;br /&gt;
| fueltype         = [[Coal]] or [[fuel oil]]&lt;br /&gt;
| fuelcap          = &amp;#039;&amp;#039;2011:&amp;#039;&amp;#039; {{convert|850|l}} of diesel and {{convert|2250|l}} of fuel oil&lt;br /&gt;
| watercap         = &lt;br /&gt;
| tendercap        = &lt;br /&gt;
| sandcap          = &lt;br /&gt;
| boiler           = &lt;br /&gt;
| boilerpressure   = &lt;br /&gt;
| feedwaterheater  = &lt;br /&gt;
| firearea         = &lt;br /&gt;
| tubearea         = &lt;br /&gt;
| fluearea         = &lt;br /&gt;
| tubesandflues    = &lt;br /&gt;
| fireboxarea      = &lt;br /&gt;
| totalsurface     = &lt;br /&gt;
| superheatertype  = &lt;br /&gt;
| superheaterarea  = &lt;br /&gt;
| cylindercount    = Four, outside, compound&lt;br /&gt;
| hpcylindersize   = Adhesion: {{convert|450|x|410|mm|in|2|abbr=on}}&lt;br /&gt;
| lpcylindersize   = Rack: {{convert|450|x|430|mm|in|2|abbr=on}}&lt;br /&gt;
| valvegear        = [[Walschaerts valve gear|Walschaerts]]&lt;br /&gt;
| valvetype        = &lt;br /&gt;
| valvetravel      = &lt;br /&gt;
| valvelap         = &lt;br /&gt;
| valvelead        = &lt;br /&gt;
| transmission     = &lt;br /&gt;
| maxspeed         = Adhesion: {{convert|30|km/h|mph|0|abbr=on}}&amp;lt;br&amp;gt;Rack: {{convert|15|km/h|mph|0|abbr=on}}&lt;br /&gt;
| poweroutput      = &lt;br /&gt;
| tractiveeffort   = &lt;br /&gt;
| factorofadhesion = &lt;br /&gt;
| trainheating     = &lt;br /&gt;
| locobrakes       = &lt;br /&gt;
| locobrakeforce   = &lt;br /&gt;
| trainbrakes      = &lt;br /&gt;
| safety           = &lt;br /&gt;
| operator         = &lt;br /&gt;
| operatorclass    = &lt;br /&gt;
| powerclass       = &lt;br /&gt;
| numinclass       = &lt;br /&gt;
| fleetnumbers     = &lt;br /&gt;
| officialname     = &lt;br /&gt;
| nicknames        = &lt;br /&gt;
| axleloadclass    = &lt;br /&gt;
| locale           = &lt;br /&gt;
| deliverydate     = &lt;br /&gt;
| firstrundate     = &lt;br /&gt;
| lastrundate      = &lt;br /&gt;
| withdrawndate    = &lt;br /&gt;
| preservedunits   = &lt;br /&gt;
| restoredate      = &lt;br /&gt;
| scrapdate        = &lt;br /&gt;
| currentowner     = &lt;br /&gt;
| disposition      = &lt;br /&gt;
| notes            =&lt;br /&gt;
}}&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;X class locomotives&amp;#039;&amp;#039;&amp;#039; are [[metre gauge]] [[0-8-2T]] [[Rack railway#Abt (1882)|rack and pinion]] [[compound locomotive]]s on the [[Nilgiri Mountain Railway]] in the [[Nilgiri Hills]] of southern [[India]]. They are used on the {{convert|28|km|mi|adj=mid|-long}} section between [[Coonoor]] and [[Mettupalayam, Coimbatore|Mettupalayam]], where the steepest gradient is 1 in 12.5. The railway uses the [[Rack railway#Abt|Abt]] system on these steep sections. The locomotives have two high-pressure and two low-pressure cylinders, located outside the locomotive&amp;#039;s frames. The low-pressure cylinders drive the rack gears, and are positioned above the two main high-pressure cylinders which drive the main wheels.&lt;br /&gt;
&lt;br /&gt;
This class of engine was acquired to replace the line&amp;#039;s original [[Beyer-Peacock]] [[2-4-0T]] rack locomotives, which were not powerful enough to handle the traffic.&amp;lt;ref name=&amp;quot;irfc&amp;quot;&amp;gt;{{cite web|url=http://www.irfca.org/articles/isrs/isrs082004-steam-history.html|title=Steam in history|last=Bhandari|first=R. R.|year=2008|publisher=IRFCA|access-date=2 March 2010}}&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;{{cite web|url=http://www.indiaforvisitors.com/travel/train/bluemountain.htm|title=Blue Mountain Railway|year=2003|work=India for Visitors|publisher=indiaforvisitors.com|access-date=2 March 2010}}&amp;lt;/ref&amp;gt; The X-class locomotives were bought in two batches from the [[Swiss Locomotive and Machine Works]], Winterthur, Switzerland. The first batch of 12 was delivered between 1914 and 1925, and the second batch of five was delivered in 1952.&amp;lt;ref name= &amp;quot;irfc&amp;quot; /&amp;gt;&amp;lt;ref&amp;gt;{{cite web|url=http://railinindia.tripod.com/nrm.html|title=National Railway Museum|work=Rail in India|access-date=2 March 2010}}&amp;lt;/ref&amp;gt; Four more members of the class were built in India between 2011 and 2014.&lt;br /&gt;
&lt;br /&gt;
== SLM orders ==&lt;br /&gt;
{| class=wikitable style=text-align:center&lt;br /&gt;
|+ SLM orders&amp;lt;ref&amp;gt;{{Harvnb|Hughes|1992|p=98}}&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;{{Harvnb|Hughes|1996|p=58}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
! SLM Works Nos. !! Year !! Quantity !! NMR No. !! All India No. !! Notes&lt;br /&gt;
|-&lt;br /&gt;
| 2456–2459, 2469–2470 || 1914 || 6 || 1–6 || 37379–37384  || ex-No. 1-6, 37379-37383 (1-5) scrapped off during the [[British Raj]]&lt;br /&gt;
|-&lt;br /&gt;
| 2734–2736, 2733 || 1920 || 4 || 7–10 || 37385–37388 || &lt;br /&gt;
|-&lt;br /&gt;
| 3000–3001 || 1925 || 2 || 11–12 || 37389–37390 || &lt;br /&gt;
|-&lt;br /&gt;
| 4069–4073 || 1952 || 5 || 13–17 || 37391–37395 || &lt;br /&gt;
|-&lt;br /&gt;
| n/a || 2011 - 2014 || 4 || 18–21 || 37396–37399 || Non-SLM, All Oil-powered, 37397-37399 (19-21) rebuilt by G.O.C. in 2018, 2019 and 2020 with modern loco pilot cabs&lt;br /&gt;
|-&lt;br /&gt;
| n/a || 2020 - 2021 || 2 || 22–23 || 37400–37401 || Non-SLM, Not Yet Rolled Out, One Coal-powered and Another Oil-powered (Source:- Deccan Herald)&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Conversion to oil ==&lt;br /&gt;
[[File:NMR Locomotive 37395 at Coonor 05-02-27 21.jpeg|thumb|alt=Black-and-blue locomotive, converted from coal to oil firing|Locomotive No.37395 at Coonoor Shed, February 2005]]&lt;br /&gt;
The coal-fired Locomotive No. 37395 was modified to oil firing in 2002, and another locomotive was similarly modified shortly afterwards. The railway intends to convert more locomotives to oil-fired system, since they are less likely to spark forest fires and are easier to refuel. Unlike coal-fired engines which require two firemen, only one fireman needs to travel with the driver of an oil-fired locomotive.&amp;lt;ref name=&amp;quot;Hindu&amp;quot;&amp;gt;{{cite news |url=http://www.hindu.com/2009/12/21/stories/2009122153510500.htm |title=Work for manufacturing four new oil-fired steam locos begins|last=Rajaram|first=R.|archive-url=https://web.archive.org/web/20091231205117/http://www.hindu.com/2009/12/21/stories/2009122153510500.htm|archive-date=31 December 2009|location=Chennai, India|url-status=dead |work=[[The Hindu]] |date=21 December 2009}}&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;{{cite web|url=http://www.encyclopedia.com/video/X8VsogADY9Y-oil-fired-steam-engine-on.aspx|title=Oil fired Steam engine on Nilagiri Railway , India|year=2009|work=Encyclopedia.com|publisher=HighBeam|access-date=2 March 2010}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
== {{anchor|New builds}}New locomotives ==&lt;br /&gt;
To ease the load on existing X-class locomotives, four oil-fired X-Class 0-8-2T rack and pinion [[compound engine]] steam locomotives with a similar design were ordered. The first one (No. X 37396) arrived in February 2011 and entered service on March 24 of that year. The second one (X 37397), named &amp;quot;Betta Queen&amp;quot; was rolled out at the [[Golden Rock Railway Workshop]] in February 2012, and entered service on the railway in March. The third one built by Golden Rock, Trichy (X 37398), named &amp;quot;Nilgiri Queen&amp;quot;, entered service in March 2013. The fourth (X 37399), named &amp;quot;Nilgiri Flycatcher&amp;quot; was rolled out on March 5, 2014 at the Central Workshop in Ponmalai, Tiruchirapalli, to join the fleet after trials on the railway.&lt;br /&gt;
&lt;br /&gt;
In 2020, under Central Govt&amp;#039;s order, [[Golden Rock Railway Workshop|Ponmalai Goldenrock (G.O.C.)]] started manufacture of one coal-powered and one oil-powered X-Class Steam Engine, But due to covid, lockdown etc, could not finish and roll out on time (Source:- Deccan Herald)&lt;br /&gt;
&lt;br /&gt;
==In fiction==&lt;br /&gt;
[[Thomas the Tank Engine film characters#Ashima|Ashima]], a character based on the X Class and voiced by [[Tina Desai]], appears in the 2016 animated film &amp;#039;&amp;#039;[[Thomas &amp;amp; Friends: The Great Race]]&amp;#039;&amp;#039;. She also appears in [[Thomas &amp;amp; Friends (series 22)|the twenty-second series]], [[Thomas &amp;amp; Friends (series 23)|the twenty-third series]] and [[Thomas &amp;amp; Friends (series 24)|the twenty-fourth series]] of [[Thomas &amp;amp; Friends]]. &amp;lt;ref&amp;gt;{{Cite web|date=March 31, 2016|title=Meet Ashima, and Her Impact on Child Product Sales to India|url=http://www.india-briefing.com/news/meet-ashima-impact-child-product-sales-india-11925.html/|publisher=India Briefing|access-date=July 13, 2017|archive-url=https://web.archive.org/web/20161207112309/http://www.india-briefing.com/news/meet-ashima-impact-child-product-sales-india-11925.html/|archive-date=December 7, 2016}}&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;{{cite web|url=http://play.thomasandfriends.com/en-us/engines/Ashima.html|title=Ashima - Character Profile &amp;amp; Bio|work=Thomas &amp;amp; Friends - Official Website|access-date=August 26, 2017}}&amp;lt;/ref&amp;gt;&amp;lt;ref&amp;gt;{{Cite web|date=April 6, 2016|title=Flying Scotsman on track to star in new &amp;#039;more diverse&amp;#039; Thomas the Tank Engine film|url=http://www.itv.com/news/2016-04-06/thomas-the-tank-engine-on-track-to-make-new-international-friends/|publisher=[[ITV (TV network)|ITV News]]|access-date=July 13, 2017|archive-url=https://web.archive.org/web/20160811022255/http://www.itv.com/news/2016-04-06/thomas-the-tank-engine-on-track-to-make-new-international-friends/|archive-date=August 11, 2016}}&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==In Bollywood==&lt;br /&gt;
The X-class Steam Engines were temporarily repainted and used in the song [[Chaiyya Chaiyya|Chayya Chayya]], featuring [[Shah Rukh Khan]] and [[Malaika Arora]] dancing on the Train, from the 1998 [[Mani Ratnam]] movie [[Dil Se]]. For shooting the song, Mani Ratnam spoke to NMR for painting the X-class Steam Engines in Greenish Black Color and the Train Rakes in Brick Color, for 5 days, as the shooting took 108 hours (4.5 days).&lt;br /&gt;
&lt;br /&gt;
== References ==&lt;br /&gt;
===Notes===&lt;br /&gt;
{{Reflist}}&lt;br /&gt;
===Bibliography===&lt;br /&gt;
{{refbegin}}&lt;br /&gt;
*{{cite book |last=Hughes |first=Hugh |year=1992 |title=Indian Locomotives, Part 2 – Metre Gauge 1872–1940 |location=Harrow, Middlesex |publisher=Continental Railway Circle |isbn=978-0-9503469-9-1}}&lt;br /&gt;
*{{cite book |last=Hughes |first=Hugh |year=1996 |title=Indian Locomotives, Part 4 – 1941–1990 |location=Harrow, Middlesex |publisher=Continental Railway Circle |isbn=978-0-9521655-1-4}}&lt;br /&gt;
{{refend}}&lt;br /&gt;
&lt;br /&gt;
== External links ==&lt;br /&gt;
{{Commonscat-inline|Nilgiri Mountain Railway class X}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Steam locomotives of India]]&lt;br /&gt;
[[Category:Compound locomotives]]&lt;br /&gt;
[[Category:0-8-2T locomotives]]&lt;br /&gt;
[[Category:SLM locomotives]]&lt;br /&gt;
[[Category:Rack and cog driven locomotives]]&lt;br /&gt;
[[Category:Metre gauge steam locomotives]]&lt;br /&gt;
[[Category:Passenger locomotives]]&lt;br /&gt;
[[Category:Railway locomotives introduced in 1914]]&lt;/div&gt;</summary>
		<author><name>106.200.239.114</name></author>
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