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 =
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| aarwheels =
| uicclass =
| Britishclass =
| driver =
| gauge = {{track gauge|ussg }}
| trucks =
| bogies =
| leadingdiameter =
| wheeldiameter = {{convert|40|in|cm|abbr=on}}
| trailingdiameter =
| minimumcurve =
| wheelbase =
| engine total =
| leading =
| drivers =
| coupled =
| trailing =
| truck =
| bogie =
| tender total =
| tendertruck =
| tenderbogie =
| pivotcentres =
| wheelspacing =
| 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=
| weightondrivers =
| trail bogie/pony =
| 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 =
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| enginetype =
| aspiration =
| displacement =
| alternator =
| generator = GE GT598 D3A
| tractionmotors = GE 752
| t/m amps 1 hr =
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| headendpower =
| cylindercount =
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| 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=
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| poweroutput cont=
| tractiveeffort =
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| t/e continuous =
| factorofadhesion =
| f/adh starting =
| f/adh 1 hr =
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| safety =
| operator = Southern Pacific Transportation Company
| operatorclass = TE70-4S
| powerclass =
| numinclass =
| fleetnumbers =
| officialname =
| nicknames = Popsicle
| axleloadclass =
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| disposition = All scrapped
| notes = {{cite web | title=TE 70-4S Brochure | publisher=Morrison-Knudsen | url=http://espee.railfan.net/te_70-4s_brochure.html | accessdate=April 20, 2017 }}
}}
The M-K TE70-4S was a four-axle {{convert|2800|hp|MW|1|abbr=on}} B-B diesel-electric locomotive built by Morrison-Knudsen. The locomotive was a rebuild of the GE U25B with a Sulzer V-12 prime mover installed. Morrison-Knudsen rebuilt four for the Southern Pacific Railroad in 1978. The experiment proved unsuccessful and no additional units were rebuilt.
Design
The prime mover for the M-K TE70-4S was a Sulzer 12ASV 25/30. Normally found in marine or stationary uses, the 12ASV 25/30 had been in production since 1969. The four-stroke turbocharged engine was rated for a maximum of {{convert|3240|hp|MW|1|abbr=on}} at 1000 RPM.{{Harvnb|Fearon|1978|p=3}} The locomotives retained the GE GT598 D3A generators and GE 752 traction motors from the U25B. The capability of the prime mover notwithstanding, the locomotive was rated at {{convert|2800|hp|MW|1|abbr=on}}.{{Harvnb|Fearon|1978|p=4}}
The new prime mover required substantial alterations to the cab, carbody, and underframe.{{Harvnb|Fearon|1978|pp=9–10}} 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}}.
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.{{Harvnb|Pinkepank|Marre|1979|p=137}} 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–Los Angeles trailer-on-flatcar (TOFC) train between Portland and Los Angeles.{{Harvnb|Fearon|1978|pp=10–11}} Inauspiciously, one of the four locomotives broke down during the trip.{{Harvnb|Pacific News|1978|p=28}}
The locomotives carried a unique paint scheme featuring the red-and-orange of the SP's famed "Daylight" passenger trains, albeit in a different style.{{Harvnb|Guernsey|Immel|McKinley|Leeder|1978|p=2}}{{Harvnb|Pacific News|1979|p=4}} The color scheme led to the nickname "Popsicle". Due to their consistent unreliability, all four were retired in 1987 after less than ten years; none were preserved.{{Harvnb|Lustig|2003|p=23}}
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 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 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 | 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:Diesel–electric locomotives of the United States