View source for M-K TE70-4S

{{Short description|Train locomotive model}}
{{Infobox locomotive
| name             = M-K TE70-4S
| image            = Southern Pacific Popsicles (30588553390).jpg
| alt              =
| caption          = Three of the four SP M-K TE70-4S locomotives on their maiden run in March 1978
| powertype        = Diesel-electric
| designer         =
| builder          = [[Morrison-Knudsen]]
| ordernumber      =
| serialnumber     =
| buildmodel       =
| builddate        =
| totalproduction  =
| rebuilder        =
| rebuilddate      =
| numberrebuilt    =
| aarwheels        =
| uicclass         =
| Britishclass     = <!-- e.g. [[Bo-Bo]] [[1Co+Co1]] -->
| driver           = <!-- e.g. 1st, 2nd  or 3rd coupled axle -->
| gauge            = {{track gauge|ussg }}
| trucks           =
| bogies           =
| leadingdiameter  =
| wheeldiameter    = {{convert|40|in|cm|abbr=on}}
| trailingdiameter =
| minimumcurve     =
| wheelbase        =
|  engine total    =
|  leading         =
|  drivers         = <!-- USA terminology -->
|  coupled         = <!-- British terminology -->
|  trailing        =
|  truck           = <!-- USA terminology diesels and electrics -->
|  bogie           = <!-- British terminology diesels and electrics -->
|  tender total     =
|  tendertruck     = <!-- USA terminology -->
|  tenderbogie     = <!-- British terminology -->
| pivotcentres     = <!-- Garratts, diesels and electrics -->
| wheelspacing     = <!-- bogies or coupled wheels with asymmetrical wheel spacing -->
| length           = {{convert|60|ft|2|in|m|1|abbr=on}}
|  over couplers   =
|  over bufferbeams=
|  body            =
| width            = {{convert|10|ft|7+1/2|in|m|1|abbr=on}}
| height           = {{convert|15|ft|10+7/8|in|m|1|abbr=on}}
| axleload         =
|  leadingbogie/pony= <!-- load on leading bogie or pony wheel -->
| weightondrivers  =
| trail bogie/pony = <!-- load on trailing bogie or pony wheel -->
| locoweight       = {{convert|279000|lb|0|abbr=on}}
| fueltype         =
| fuelcap          =
| lubecap          =
| coolantcap       =
| watercap         =
| sandcap          =
| powersupply      =
| consumption      =
| watercons        =
| primemover       = Sulzer 12ASV 25/30
| rpmrange         = 1000
|  rpmrange low    =
|  rpmrange idle   =
|  rpmrange max    =
| enginetype       =
| aspiration       =
| displacement     = <!-- per cylinder -->
| alternator       =
| generator        = GE GT598 D3A
| tractionmotors   = GE 752
|  t/m amps 1 hr   = <!-- Power output rating per motor -->
|  t/m amps cont   = <!-- Power output rating per motor -->
| headendpower     =
| cylindercount    =
| cylindersize     =
| transmission     =
| gear ratio       = 74/18
| multipleworking  =
| trainheating     =
| locobrakes       =
| dynamicpeakeffort=
| locobrakeforce   =
| trainbrakes      =
| reservoircap     =
| compressorcap    =
| exhaustercap     =
| coupling         =
| maxspeed         = {{convert|70|mph|abbr=on}}
| poweroutput      = {{convert|2800|hp|MW|1|abbr=on}}
|  poweroutput start=
|  poweroutput 1 hr=
|  poweroutput cont=
| tractiveeffort   =
|  t/e starting    =
|  t/e 1 hr        =
|  t/e continuous  =
| factorofadhesion =
|  f/adh starting  =
|  f/adh 1 hr      =
|  f/adh continuous=
| safety           =
| operator         = Southern Pacific Transportation Company
| operatorclass    = TE70-4S
| powerclass       =
| numinclass       =
| fleetnumbers     =
| officialname     =
| nicknames        = Popsicle
| axleloadclass    =
| locale           =
| deliverydate     =
| firstrundate     =
| lastrundate      =
| retiredate       =
| withdrawndate    =
| preservedunits   =
| restoredate      =
| scrapdate        =
| currentowner     =
| disposition      = All scrapped
| notes            = <ref name="Morrison-Knudsen">{{cite web | title=TE 70-4S Brochure | publisher=[[Morrison-Knudsen]] | url=http://espee.railfan.net/te_70-4s_brochure.html | accessdate=April 20, 2017 }}</ref>
}}
The '''M-K TE70-4S''' was a four-axle {{convert|2800|hp|MW|1|abbr=on}} [[AAR wheel arrangement#B-B|B-B]] [[diesel-electric locomotive]] built by [[Morrison-Knudsen]]. The locomotive was a rebuild of the [[GE U25B]] with a [[Sulzer (manufacturer)|Sulzer]] [[V12 engine|V-12]] [[Prime mover (locomotive)|prime mover]] installed. Morrison-Knudsen rebuilt four for the [[Southern Pacific Transportation Company|Southern Pacific Railroad]] in 1978. The experiment proved unsuccessful and no additional units were rebuilt.
== Design ==
The [[Prime mover (locomotive)|prime mover]] for the M-K TE70-4S was a [[Sulzer (manufacturer)|Sulzer]] 12ASV 25/30. Normally found in [[marine propulsion|marine]] or [[Stationary engine|stationary]] uses, the 12ASV 25/30 had been in production since 1969. The [[Four-stroke engine|four-stroke]] [[Turbocharger|turbocharged]] engine was rated for a maximum of {{convert|3240|hp|MW|1|abbr=on}} at 1000 [[Revolutions per minute|RPM]].<ref>{{Harvnb|Fearon|1978|p=3}}</ref> The locomotives retained the GE GT598 D3A [[Electric generator|generator]]s and GE 752 [[traction motor]]s from the U25B. The capability of the prime mover notwithstanding, the locomotive was rated at {{convert|2800|hp|MW|1|abbr=on}}.<ref>{{Harvnb|Fearon|1978|p=4}}</ref>
The new prime mover required substantial alterations to the [[Cab (locomotive)|cab]], carbody, and [[underframe]].<ref>{{Harvnb|Fearon|1978|pp=9–10}}</ref> The locomotive measured {{convert|60|ft|2|in|m|1|abbr=on}} long by {{convert|10|ft|7+1/2|in|m|1|abbr=on}} wide, and stood {{convert|15|ft|10+7/8|in|m|1|abbr=on}} high. It weighed {{convert|279000|lb|0|abbr=on}}.<ref name="Morrison-Knudsen" />
== History ==
Southern Pacific sent four GE U25Bs ({{Abbr|Nos.|Numbers}} 7030–7033), then at the end of their service life, to Morrison-Knudsen for rebuilding.<ref>{{Harvnb|Pinkepank|Marre|1979|p=137}}</ref> Morrison-Knudsen rebuilt the four locomotives in its [[Boise, Idaho]], shops in 1977–1978. The first revenue run occurred beginning March 1, 1978, when the four locomotives handled a [[Seattle, Washington|Seattle]]–[[Los Angeles]] [[Piggyback (transportation)|trailer-on-flatcar]] (TOFC) train between Portland and Los Angeles.<ref>{{Harvnb|Fearon|1978|pp=10–11}}</ref> Inauspiciously, one of the four locomotives broke down during the trip.<ref>{{Harvnb|Pacific News|1978|p=28}}</ref>
The locomotives carried a unique paint scheme featuring the red-and-orange of the SP's famed [[Coast Daylight|"Daylight"]] passenger trains, albeit in a different style.<ref>{{Harvnb|Guernsey|Immel|McKinley|Leeder|1978|p=2}}</ref><ref>{{Harvnb|Pacific News|1979|p=4}}</ref> The color scheme led to the nickname "[[Ice pop|Popsicle]]". Due to their consistent unreliability, all four were retired in 1987 after less than ten years; none were preserved.<ref>{{Harvnb|Lustig|2003|p=23}}</ref>
== Notes ==
{{Reflist|30em}}
== References ==
* {{cite journal | url=http://original.trainlife.com/magazines/pages/737/49030/february-1978-page-28 | title=News Photos | date=February 1978 | journal=[[Pacific RailNews|Pacific News]] | volume=18 | issue=2 | page=28 | issn=0030-879X | ref={{harvid|Pacific News|1978}} |archive-url=https://web.archive.org/web/20170422142327/http://original.trainlife.com/magazines/pages/737/49030/february-1978-page-28 |archive-date=April 22, 2017 |url-status=dead}}
* {{cite journal | title=M-K's New TE50-4S unit | url=http://original.trainlife.com/magazines/pages/729/48646/september-1979-page-4 | journal=[[Pacific RailNews|Pacific News]] | date=September 1979 | volume=19 | issue=9 | page=4 | issn=0030-879X | ref={{harvid|Pacific News|1979}} |archive-url=https://web.archive.org/web/20170422143738/http://original.trainlife.com/magazines/pages/729/48646/september-1979-page-4 |archive-date=April 22, 2017 |url-status=dead}}
* {{cite conference |title=Application of Sulzer 12ASV 25/30 Diesel Engines to M-K TE70-4S Locomotives |last=Fearon |first=Joseph G. |date=1978 |publisher=[[American Society of Mechanical Engineers]] |pages=1–12 |conference=Energy Technology Conference & Exhibition, Houston, Texas, November 5-9, 1978 |id=78-DGP-15}}
* {{cite journal | title=Morrison-Knudsen-Built TE70-4S's Delivered to Espee | last1=Guernsey | first1=Paul | last2=Immel | first2=Ed | last3=McKinley | first3=Gene | last4=Leeder | first4=Bryan | journal=The Trainmaster | url=http://www.pnwc-nrhs.org/Trainmaster1978/TM-1978-03.pdf | issue=211 | page=2 | date=March 1978}}
* {{cite journal | title=Whatever happened to SP's 'Popsicles'? | last=Lustig | first=David | journal=[[Trains (magazine)|Trains]] | date=May 2003 | volume=63 | issue=5 | page=23 | issn=0041-0934}}
* {{cite book | last1=Pinkepank | first1=Jerry A. | last2=Marre | first2=Louis A. | title=Diesel Spotter's Guide Update | date=1979 | publisher=[[Kalmbach Publishing]] | location=Milwaukee, WI | isbn=0-89024-029-9}}
== Further reading ==
* {{cite book | title=Future Fuels and Engines for Railroad Locomotives | last1=Liddle | first1=S. G. | last2=Bonzo | first2=B. B. | last3=Purohit | first3=G. P. | last4=Stallkamp | first4=J. A. | volume=2 | publisher=[[Jet Propulsion Laboratory]] | location=Pasadena, CA | date=1981 | url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19820018174.pdf}}
* {{Solomon-GE and EMD}}
== External links ==
* [http://espee.railfan.net/te_70-4s.html Southern Pacific TE70-4S on My Espee Modelers Archive]
{{MPI Locomotives}}
[[Category:Morrison-Knudsen locomotives|TE70-4S]]
[[Category:B-B locomotives]]
[[Category:Diesel–electric locomotives of the United States]]
[[Category:Railway locomotives introduced in 1978]]
[[Category:Freight locomotives]]
[[Category:Standard gauge locomotives of the United States]]