View source for PKP class SM48

{{Short description|Polish diesel locomotive class}}
{{more citations needed|date=October 2021}}
{{Infobox locomotive
|name             = SM48
|powertype        = Diesel-electric
|image            = SM48-086 locomotive.jpg
|caption          = SM48 locomotive
|builder          = [[USSR]]
|serialnumber     = 
|buildmodel       = ТЭМ2 (TEM2)
|builddate        = 1976
|totalproduction  = 
|uicclass         = [[Co′Co′]]
|gauge            = {{track gauge|sg|allk=on}}
|driverdiameter   = {{convert|1050|mm|in|2|abbr=on}}
|wheelbase        =
|length           = {{convert|16.97|m|ftin|0|abbr=on}}
|width            = <!-- {{convert|4.44|m|ftin|0|abbr=on}},too wide! -->(?)
|height           = {{convert|4.44|m|ftin|0|abbr=on}}
|axleload         = 
|locoweight       = {{convert|116|t|abbr=on}}
|fueltype         = [[Diesel fuel|Diesel]]
|fuelcap          = {{convert|4590|L|abbr=on}}
|primemover       = [[PD1M]]
|enginetype       = 
|aspiration       = 
|displacement     =
|cylindercount    = 6
|cylindersize     = 
|valvegear        =
|transmission     = [[Diesel-electric transmission|Diesel electric]]
|maxspeed         = {{convert|100|km/h|mph|0|abbr=on}}
|poweroutput      = {{convert|883|kW|hp|abbr=on}}
|tractiveeffort   = {{convert|372.65|kN|lbf|abbr=on}}
|factorofadhesion =
|locobrakes       = [[Matrosow]]
|trainbrakes      = [[Railway air brake|Air]]
|operator         = [[Polish State Railways|PKP]]
|operatorclass    = SM48
|numinclass       =
|fleetnumbers     =
|officialname     =
|nicknames        = Walentyna<br>Tamara
|locale           = 
|deliverydate     = 
|firstrundate     =
|lastrundate      =
|retiredate       =
|restoredate      =
|scrapdate        =
|currentowner     =
|disposition      =
}}
'''SM48''' is the name for class of [[Soviet Union|Soviet]] [[diesel locomotive]]s operating in [[Poland]] for [[Polish State Railways|PKP]]. The original designation was ТЭМ2 (TEM2), and was the Soviet-built version{{citation needed|date=July 2012}} of the [[ALCO RSD-1]].

==History==
The SM48 was originally put into service on the eastern [[Poland|Polish]] railways, where {{track gauge|1524 mm|al=on|lk=on}} Russian [[broad gauge]] railways were still in use. It turned out that the locomotive fitted well within the [[structure gauge]] on standard gauge lines.

===Introduction===
Since 1976, [[Polish State Railways|PKP]] have bought 130 SM48 locomotives. There are also locomotives in service with other Polish operators: PCC Rail, PTKiGK Zabrze, Kopalnia Piasku Kotlarnia.

==Modernizations==
[[File:ST48-019-Rydułtowy.jpg|thumb|left|Newag 15D, owned by PKP Cargo, bearing the ST48-019 marking.]]
Since 2010, several locomotives underwent modernization to [[Newag 15D/16D]] standard.<ref>{{cite news |title=15D/16D |url=https://www.newag.pl/en/offer/15-16d/ |website=Newag }}</ref> ([[PKP Cargo]] classes them as ST48.)

In 2017, [[Pojazdy Szynowe Pesa Bydgoszcz|Pesa]] offered their version of modernization, designated 19D.<ref>{{cite journal |first1=Piotr |last1=Michalak |first2=Wojciech |last2=Jakuszko |first3=Mariusz |last3=Far |title=Modern systems and assemblies in modernized 6Di and 19D locomotives |url=http://www.tabor.lukasiewicz.gov.pl/pojazdy-szynowe-2-2018/ |journal=Pojazdy Szynowe |issn=0138-0370 |issue=2/2018 |pages=38–51 }}</ref><ref>{{cite news |title=[PL] IPS Tabor and Pesa present: the first 19D modernization locomotive |url=https://railcolornews.com/2017/05/03/pl-first-19d-modernization-locomotive/ |website=Railcolor News |date=3 May 2017 }}</ref>

In 2021, {{ill|Tabor Dębica|pl|Zakłady Produkcyjno-Naprawcze Taboru Maszyn i Urządzeń Tabor}} offered their version of modernization, designated 20D.<ref>{{cite web |title=Locomotives – Catalogue |url=https://www.tabor-debica.pl/getFile.php?id=7025 |type=PDF |website=Tabor Dębica }}</ref><ref>{{cite news |first=Jakub |last=Madrjas |title=Tabor Dębica zaprezentował lokomotywę 20D |trans-title=Tabor Dębica demonstrated 20D locomotive |url=https://www.rynek-kolejowy.pl/wiadomosci/tabor-debica-zaprezentowal-lokomotywe-20d-104151.html |date=27 August 2021 |language=pl }}</ref>

==Nicknames==
*'''Tamara''' – from an original [[USSR]] name "TEM2"
*'''Walentyna''' – from a popular female name in [[USSR]]

==See also==
*[[Polish locomotives designation]]

==References==
{{reflist}}

{{commons category|PKP class SM48}}
{{PKP Locomotives}}
{{JŽ rolling stock}}

{{DEFAULTSORT:Pkp Class Sm48}}
[[Category:Diesel–electric locomotives of Poland]]
[[Category:Co′Co′ locomotives]]
[[Category:Railway locomotives introduced in 1976]]
[[Category:Standard-gauge locomotives of Poland]]
[[Category:Shunting locomotives]]


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