Sentetsu Pashiko-class locomotive

{{short description|4-6-2 steam locomotive}}

{{Infobox locomotive

| name = {{nowrap|Chosen Government Railway Pashiko class (パシコ)}}
Korean National Railroad Pasi5 class (바시5)
Korean State Railway Pasio class (바시오)

| powertype =Steam

| image = Pashiko.JPG

| caption = Sentetsu Pashiko class locomotives パシコ7 and パシコ13

| designer =

| builder = Gyeongseong Works, Kawasaki

| ordernumber =

| serialnumber =

| buildmodel =

| builddate = 1939 Gyeongseong (2)
1940–1944 Kawasaki (40)

| totalproduction = 40

| rebuilder =

| rebuilddate =

| numberrebuilt =

| whytetype = 4-6-2

| uicclass =

| gauge = {{track gauge|1435mm}}

| leadingdiameter =

| driverdiameter = {{convert|1,850|mm|in|abbr=on}}

| trailingdiameter =

| minimumcurve =

| wheelbase =

| length = {{convert|23,756|mm|ftin|abbr=on}}

| width = {{convert|3,170|mm|ftin|abbr=on}}

| height = {{convert|4,700|mm|ftin|abbr=on}}

| axleload =

| weightondrivers =

| locoweight = {{convert|112.00|t|LT|abbr=on}}

| tenderweight = {{convert|84.00|t|LT|abbr=on}}

| locotenderweight =

| tendertype =

| fueltype =

| fuelcap = {{convert|14.0|t|LT|abbr=on}}

| watercap = {{convert|35,000|L|gal|abbr=on}}

| tendercap =

| sandcap =

| boiler =

| smalltubediameter= 75 x {{convert|51|mm|abbr=on}}

| largetubediameter= 120 x {{convert|90|mm|abbr=on}}

| boilerpressure = {{convert|15.0|kgf/cm2|abbr=on}}

| feedwaterheater =

| firearea = {{convert|6.20|m2|abbr=on}}

| tubearea = {{convert|252.60|m2|abbr=on}}

| fluearea =

| tubesandflues =

| fireboxarea = {{convert|27.40|m2|abbr=on}}

| totalsurface = {{convert|280.00|m2|abbr=on}}

| superheatertype =

| superheaterarea = {{convert|113.70|m2|abbr=on}}

| cylindercount = 2

| cylindersize = {{convert|580|x|660|mm|abbr=on}}

| frontcylindersize=

| rearcylindersize =

| hpcylindersize =

| lpcylindersize =

| valvegear = Walschaerts

| valvetype =

| valvetravel =

| valvelap =

| valvelead =

| transmission =

| maxspeed = {{convert|110|km/h|abbr=on}}

| poweroutput =

| tractiveeffort = {{convert|162.0|kN|abbr=on}}

| factorofadhesion =

| trainheating =

| locobrakes =

| locobrakeforce =

| trainbrakes =

| safety =

| operator = Chosen Government Railway
Korean National Railroad
Korean State Railway

| operatorclass = Sentetsu: パシコ
KNR: 바시5
KSR: 바시오

| powerclass =

| numinclass = Sentetsu: 42

| fleetnumbers = Sentetsu: パシコ1–パシコ42

| officialname =

| nicknames =

| axleloadclass =

| locale =

| deliverydate = 1939–1944

| firstrundate =

| lastrundate =

| retiredate =

| withdrawndate =

| preservedunits = 1

| restoredate =

| scrapdate =

| currentowner =

| disposition = One preserved, remainder scrapped.

| notes =

}}

The Pashiko class (パシコ) locomotives were a group of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 4-6-2 wheel arrangement. The "Pashi" name came from the American naming system for steam locomotives, under which locomotives with 4-6-2 wheel arrangement were called "Pacific".

In all, Sentetsu owned 144 locomotives of all Pashi classes, of which 141 survived the war; of these, 73 went to the Korean National Railroad in South Korea and 68 to the Korean State Railway in North Korea.{{cite web|url=http://web.pernet.net/~james1/us_steam/korea.htm|title=North and South Korea Steam Locomotives|date=20 April 2004|url-status=bot: unknown|archiveurl=https://web.archive.org/web/20040420003157/http://web.pernet.net/~james1/us_steam/korea.htm|archivedate=20 April 2004}}

Description

File:URM Steam locomotive No 23.JPG]]

Sentetsu designed the Pashiko class as a successor to the Pashishi class, with the first example, パシコ1, being delivered from Sentetsu's Gyeongseong Works in October 1939, and the second following a month later. They were not only the largest of all Sentetsu passenger locomotives in size, but at {{convert|159.8|t|LT|abbr=on}} they were the heaviest of all Sentetsu locomotives of any type, and with a maximum speed of {{convert|110|km/h|abbr=on}} they were the fastest as well.{{cite book |last= Byeon|first= Seong-u|date= 1999|title= 한국철도차량 100년사|trans-title= Korean Railways Rolling Stock Centennial |language= ko|location= Seoul|publisher= Korea Rolling Stock Technical Corp.}}

Like the Matei class, which was the largest of all Sentetsu's freight locomotives, the Pashiko class had a firegrate area of {{convert|6.2|m2|abbr=on}}, and like the Pashishi and its related classes, it was designed to use lignite abundant in Korea, which is less efficient than anthracite and thus requires a large heating area, and featured a combustion chamber firebox and a conical boiler. Unlike the other Pashi classes, which had drivers of {{convert|1,750|mm|abbr=on}} diameter, the Pashiko had even larger drivers of {{convert|1,850|mm|abbr=on}}.

class="wikitable"

|+ Timeline of Pashiko production for Sentetsu

YearRunning NumberBuilderTotal
Oct 1939パシコ1Gyeongseong1
Nov 1939パシコ2Gyeongseong2
1940パシコ3–パシシ12Kawasaki10
1941パシコ13–パシシ22Kawasaki10
1942パシコ23–パシシ35Kawasaki13
1943パシコ36–パシシ40Kawasaki5
1944パシコ41–パシシ42Kawasaki2
bgcolor=#dddddd rowspan="2" colspan="2" | Builder
totals
bgcolor=#dddddd|Gyeongseongbgcolor=#dddddd|2
bgcolor=#dddddd|Kawasakibgcolor=#dddddd|40
bgcolor=#ededed colspan="3" |Totalbgcolor=#ededed| 42

Postwar

After the Liberation and partition of Korea, they were divided between North and South, but the specifics of which engine went where are unclear.

=Korean National Railroad 파시5 (Pasi5) class=

At least eighteen Pashiko class engines went south to the Korean National Railroad, where they became 파시5 (Pasi5) class, and they were widely used on passenger trains until at least 1967.{{cite web|url=http://donsdepot.donrossgroup.net/dr3909.htm|archive-url=https://web.archive.org/web/20180115001443/http://donsdepot.donrossgroup.net/dr3909.htm|url-status=usurped|archive-date=January 15, 2018|title=Korean R Gaddie photos|website=donsdepot.donrossgroup.net}} 파시5-5 was partially streamlined and given a special livery of black with white and red trim in the mid-1950s by the US Army Transportation Corps railway crews.{{cite web|url=http://donsdepot.donrossgroup.net/dr168.htm|archive-url=https://web.archive.org/web/20081007112544/http://donsdepot.donrossgroup.net/dr168.htm|url-status=usurped|archive-date=October 7, 2008|title=Korean National RR Pacee-5 4-6-2|website=donsdepot.donrossgroup.net}}

class="wikitable"

|+ Known KNR 파시5-class locomotives

KNR numberSentetsu numberBuilderYearNotes
파시5-1パシコ1Gyeongseong1939
파시5-2パシコ2Gyeongseong1939
파시5-3パシコ3Kawasaki1940
파시5-4パシコ4Kawasaki1940
파시5-5パシコ5Kawasaki1940Semi-streamlined by USATC crews after the Korean War.
파시5-11パシコ11Kawasaki1940
파시5-12パシコ12Kawasaki1940Derelict by 1953.
파시5-16パシコ16Kawasaki1941
파시5-18パシコ18Kawasaki1941
파시5-19パシコ19Kawasaki1941
파시5-20パシコ20Kawasaki1941
파시5-21パシコ21Kawasaki1941
파시5-23パシコ23Kawasaki1942Works number 2649. Preserved at the Korean Railway Museum.
파시5-24パシコ24Kawasaki1942
파시5-26パシコ26Kawasaki1942
파시5-30パシコ30Kawasaki1942
파시5-31パシコ31Kawasaki1942
파시5-37パシコ37Kawasaki1943Still in service in 1968.
파시5-38パシコ38Kawasaki1943

=Korean State Railway 바시오 (Pasio) class=

The locomotives taken over by the Korean State Railway were initially designated 바시오 (Pasio) class. The total number, their service lives and subsequent fates are unknown, but they were probably retired by the end of the 1960s.

References