View source for JKOY Class Sm5

{{Short description|Class of Finnish electric multiple unit}}
{{More citations needed|date=April 2010}}
{{Infobox train
| name = JKOY Class Sm5
| image = JKOY Sm5 at Tuomarila Station 2019.jpg
| caption = Sm5 unit at [[Tuomarila railway station]].
| interiorimage = 2011-07-28-JKOY Class Sm5-by-RalfR-16.jpg
| interiorcaption = The interior of an Sm5 unit.
| service = 2009–
| manufacturer = [[Stadler Rail]]
| factory = [[Bussnang]], [[Switzerland]]
| family = [[Stadler FLIRT|FLIRT]]
| replaced = [[VR Class Sm1|Sm1]], [[VR Class Sm2|Sm2]]
| yearconstruction = 2008–2017
| yearservice = 
| refurbishment = 
| yearscrapped = 
| numberconstruction = 
| numberbuilt = 81
| numberservice = 81
| numberscrapped = 
| formation = 4-car sets
| fleetnumbers = 94 10 2081 001–081
| capacity = 583
| operator = [[VR Group]]
| depots = [[Ilmala depot|Ilmala]] 
| lines = All Helsinki commuter rail lines
| carbody = Aluminium
| trainlength = {{convert|75.2|m|ftin|abbr=on}}
| width = {{convert|3.2|m|ftin|abbr=on}}
| height = {{convert|4.4|m|ftin|abbr=on}}
| lowfloor = 70%
| floorheight = {{convert|600|mm|abbr=on}}
| platformheight = {{convert|550|mm|abbr=on}}
| entrylevelorstep =
| doors = {{plainlist|
* 1 pair of plug doors per motor car
* 2 pairs of plug doors per trailer car
}}
| wheeldiameter = {{plainlist|
* {{convert|870|mm|in|abbr=on}} (motorised bogies, new)
* {{convert|800|mm|in|abbr=on}} (trailer bogies, new)
}}
| wheelbase = {{plainlist|
* {{convert|2700|mm|ftin|abbr=on}} (motorised bogies)
* {{convert|2750|mm|ftin|abbr=on}} (trailer bogies)
}}
| maxspeed = {{convert|160|km/h|abbr=on|round=10}}
| weight = {{convert|132|t|abbr=on}}
| axleload = {{plainlist|
* {{convert|20.5|t|abbr=on}} (motorised bogies)
* {{convert|20.5|t|abbr=on}} (trailer bogies)
}}
| traction = [[ABB]] BORDLINE CC750 [[Insulated-gate bipolar transistor|IGBT]]–[[Variable-frequency drive|VVVF]]
| traction motors = 4 × TSA TMF 59-39-4 {{convert|500|kW|hp|abbr=on}}<ref>{{cite web |title= Stadler Rail FLIRT EMU for various operators |url=https://www.tsa.at/tsa_referenzen/stadler-rail-flirt-emu-for-various-operators/ |publisher=Traktionssysteme Austria |access-date=29 June 2023}}</ref>
| poweroutput = {{convert|2,000|kW|abbr=on}}
| transmission = [[Voith]] SZH-595 gearbox
| acceleration = {{convert|1.2|m/s2|abbr=on}}
| deceleration = 
| aux = 
| powersupply = 
| electricsystem = {{25 kV 50 Hz}} [[Overhead line|catenary]]
| collectionmethod = [[Pantograph (transport)|Pantograph]]
| uicclass = Bo′2′2′2′Bo′
| brakes = 
| safety = [[ATP-VR/RHK]]
| coupling = [[Scharfenberg coupler|Scharfenberg]]
| gauge = {{track gauge|1524mm|lk=on}}
| notes = Sourced from <ref>{{cite web |title=Low-floor electric multiple unit FLIRT with SZH-595 final drives |url=https://voith.com/cn/1072_e_13_g1921_e_print.pdf |publisher=[[Voith]] |access-date=29 June 2023 }}</ref><ref>{{cite magazine |title=Railvolution: The Professional Two-Monthly Magazine Of Rail Transport Worldwide |url=https://library.e.abb.com/public/d3d79c509dbdcb21c1257928003592ee/Railvolution04-11-Traction-package-Belarus-Flirt.pdf |publisher=[[ABB]] |volume=11 |access-date=29 June 2023 }}</ref><ref>{{cite web |title=Electric low-floor multiple unit FLIRT |url=https://www.stadlerrail.com/media/pdf/fjoy0908e.pdf |publisher=[[Stadler Rail]] |access-date=29 June 2023 }}</ref> except where noted.
}}

The '''Sm5''' electric multiple unit (EMU) is a low-floor train used on the [[Helsinki commuter rail]] network. Unlike other train types on the network, the Sm5 units are owned by Pääkaupunkiseudun Junakalusto Oy, a subsidiary of the cities of Helsinki, Espoo, Vantaa and Kauniainen. The units are leased to the [[Helsinki Regional Transport Authority]] (HSL), and [[VR Group|VR]] operates them. <ref name="Stadler Sm5">{{cite web |url=http://raitio.org/news/uutis08/sm5.pdf |title=Electric low-floor multiple unit FLIRT: Sm5 trains for Junakalusto Oy, Finland |accessdate=12 November 2008 |publisher=Stadler Rail |date= |archive-url=https://web.archive.org/web/20110727200636/http://raitio.org/news/uutis08/sm5.pdf |archive-date=27 July 2011 |url-status=dead }}</ref>

== History ==

Junakalusto Oy ordered 32 [[Stadler FLIRT]] EMUs from the Swiss manufacturer [[Stadler Rail]] in 2006. The first two units were delivered in November 2008<ref>{{cite journal | url = http://www.rautatietekniikka.fi/rautatietekniikka/Rautatietekniikka-4-2008.pdf | title = Sm5-juna tuli Suomeen | journal = Rautatietekniikka | year = 2008 | number = 4 | page = 26 | publisher = Rautatiealan Teknisten Liitto RTL ry | issn = 1237-1513 }}{{Dead link|date=January 2020 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> and 2009. The units were put through extensive testing on the Finnish rail network before the first unit entered commercial service in November 2009.<ref name="Junakalusto">{{cite web |url=http://www.junakalusto.fi/Uusi%20kaupunkijuna%20liikenteeseen_131109.doc |title=Uusi kaupunkijuna liikenteeseen |accessdate=20 November 2009 |date=13 November 2009 |publisher=Pääkaupunkiseudun Junakalusto Oy |language=Finnish |archive-date=7 March 2010 |archive-url=https://web.archive.org/web/20100307041108/http://www.junakalusto.fi/Uusi%20kaupunkijuna%20liikenteeseen_131109.doc |url-status=dead }}</ref> As of July 2012, seventeen units have been delivered, all of them being in service. Nine more trainsets were ordered in October 2011 and 34 further units in 2014, raising the total to 75.<ref>{{cite web | url = https://www.hsl.fi/en/news/2014/34-new-flirt-trains-commuter-train-services-5406/ | title =34 new Flirt trains for commuter train services | publisher = [[Helsingin Seudun Liikenne]] | date = 12 September 2014 | accessdate = 7 December 2014 }}</ref>

The Sm5 units are designed for the Finnish winter conditions. They are fitted with 50–100% thicker thermal insulation compared to previous FLIRT models, and the incoming fresh ventilation air is preheated with the outgoing warm air to recover heat. The entrance areas are fitted with fan heaters in order to preserve the interior climate as passengers enter and leave during cold weather.<ref>{{cite press release| url=http://www.stadlerrail.com/en/news/2009/11/18/hot-flirt-in-the-cold-north/| title=Hot FLIRT in the cold north| publisher=Stadler| date=November 18, 2009}}</ref><ref>{{cite web| url=http://www.stadlerrail.com/media/uploads/factsheets/FLIRT_Junakalusto_Oy_e.pdf| title=Electric low-floor multiple unit FLIRT - Sm5 trains for Junakalusto Oy, Finland| author=Stadler| access-date=2009-12-02| archive-url=https://web.archive.org/web/20091127185620/http://www.stadlerrail.com/media/uploads/factsheets/FLIRT_Junakalusto_Oy_e.pdf| archive-date=2009-11-27| url-status=dead}}</ref>

The Sm5 unit is mostly low-floor with all entrances level with the station platforms. The interior space is open through the articulations so that passengers can walk through all the four cars from end to end. This allows passengers to easily occupy the cars evenly. The wide Finnish [[loading gauge]] allows the cars to be wider than most European railway cars. This allows a 2+3 seating configuration in the commuter trains, but still with comfortable spacing.

The Sm5 series is planned to replace the two oldest electric multiple unit series in the Helsinki commuter traffic, the [[VR Class Sm1|Sm1]] and [[VR Class Sm2|Sm2]]. The Sm5 are also used for the airport rail service, the [[Kehärata|Ring Rail Line]] connecting the [[Helsinki-Vantaa airport]] to the rail network, operated since July 2015. At the same time HSL repainted the trains in a distinctive purple to differentiate the capital region commuter trains from the outer suburban services to places like Riihimäki.

The trains are transported from the Swiss factory by road and ferry, since they cannot run on European [[standard gauge]] railways.<ref>{{cite web | url = http://www.drehscheibe-foren.de/foren/read.php?4,5276001 | title = Ohne Drehgestelle nach Finnland | date = 26 February 2011 | accessdate = 2 June 2011 }}</ref>

==References==
{{Reflist}}

==External links==
*{{commonscat-inline|JKOY Class Sm5}}

{{Finnish locomotives}}

[[Category:Multiple units of Finland]]
[[Category:Stadler Rail multiple units]]
[[Category:25 kV AC multiple units]]
[[Category:Train-related introductions in 2009]]