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-stroketurbocharged engine was rated for a maximum of 3,240 hp (2.4 MW) at 1000 RPM.[2] 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 2,800 hp (2.1 MW).[3]
The new prime mover required substantial alterations to the cab, carbody, and underframe.[4] The locomotive measured 60 ft 2 in (18.3 m) long by 10 ft 7+1⁄2 in (3.2 m) wide, and stood 15 ft 10+7⁄8 in (4.8 m) high. It weighed 279,000 lb (126,552 kg).[1]
HistoryEdit
Southern Pacific sent four GE U25Bs (Nos. 7030–7033), then at the end of their service life, to Morrison-Knudsen for rebuilding.[5] 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 Angelestrailer-on-flatcar (TOFC) train between Portland and Los Angeles.[6] Inauspiciously, one of the four locomotives broke down during the trip.[7]
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.[8][9] 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.[10]
"M-K's New TE50-4S unit". Pacific News. 19 (9): 4. September 1979. ISSN 0030-879X.
Fearon, Joseph G. (1978). Application of Sulzer 12ASV 25/30 Diesel Engines to M-K TE70-4S Locomotives. Energy Technology Conference & Exhibition, Houston, Texas, November 5-9, 1978. American Society of Mechanical Engineers. pp. 1–12. 78-DGP-15.
Guernsey, Paul; Immel, Ed; McKinley, Gene; Leeder, Bryan (March 1978). "Morrison-Knudsen-Built TE70-4S's Delivered to Espee" (PDF). The Trainmaster (211): 2.
Lustig, David (May 2003). "Whatever happened to SP's 'Popsicles'?". Trains. 63 (5): 23. ISSN 0041-0934.
Liddle, S. G.; Bonzo, B. B.; Purohit, G. P.; Stallkamp, J. A. (1981). Future Fuels and Engines for Railroad Locomotives(PDF). Vol. 2. Pasadena, CA: Jet Propulsion Laboratory.
Southern Pacific TE70-4S on My Espee Modelers Archive
August 28, 2023
te70, four, axle, diesel, electric, locomotive, built, morrison, knudsen, locomotive, rebuild, u25b, with, sulzer, prime, mover, installed, morrison, knudsen, rebuilt, four, southern, pacific, railroad, 1978, experiment, proved, unsuccessful, additional, units. The M K TE70 4S was a four axle 2 800 hp 2 1 MW 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 M K TE70 4SThree of the four SP M K TE70 4S locomotives on their maiden run in March 1978Type and originPower typeDiesel electricBuilderMorrison KnudsenSpecificationsGauge4 ft 8 1 2 in 1 435 mm Wheel diameter40 in 100 cm Length60 ft 2 in 18 3 m Width10 ft 7 1 2 in 3 2 m Height15 ft 10 7 8 in 4 8 m Loco weight279 000 lb 126 552 kg Prime moverSulzer 12ASV 25 30RPM range1000GeneratorGE GT598 D3ATraction motorsGE 752Gear ratio74 18Performance figuresMaximum speed70 mph 110 km h Power output2 800 hp 2 1 MW CareerOperatorsSouthern Pacific Transportation CompanyClassTE70 4SNicknamesPopsicleDispositionAll scrapped 1 Contents 1 Design 2 History 3 Notes 4 References 5 Further reading 6 External linksDesign EditThe 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 3 240 hp 2 4 MW at 1000 RPM 2 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 2 800 hp 2 1 MW 3 The new prime mover required substantial alterations to the cab carbody and underframe 4 The locomotive measured 60 ft 2 in 18 3 m long by 10 ft 7 1 2 in 3 2 m wide and stood 15 ft 10 7 8 in 4 8 m high It weighed 279 000 lb 126 552 kg 1 History EditSouthern Pacific sent four GE U25Bs Nos 7030 7033 then at the end of their service life to Morrison Knudsen for rebuilding 5 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 6 Inauspiciously one of the four locomotives broke down during the trip 7 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 8 9 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 10 Notes Edit a b TE 70 4S Brochure Morrison Knudsen Retrieved April 20 2017 Fearon 1978 p 3 Fearon 1978 p 4 Fearon 1978 pp 9 10 Pinkepank amp Marre 1979 p 137 Fearon 1978 pp 10 11 Pacific News 1978 p 28 Guernsey et al 1978 p 2 Pacific News 1979 p 4 Lustig 2003 p 23References Edit News Photos Pacific News 18 2 28 February 1978 ISSN 0030 879X M K s New TE50 4S unit Pacific News 19 9 4 September 1979 ISSN 0030 879X Fearon Joseph G 1978 Application of Sulzer 12ASV 25 30 Diesel Engines to M K TE70 4S Locomotives Energy Technology Conference amp Exhibition Houston Texas November 5 9 1978 American Society of Mechanical Engineers pp 1 12 78 DGP 15 Guernsey Paul Immel Ed McKinley Gene Leeder Bryan March 1978 Morrison Knudsen Built TE70 4S s Delivered to Espee PDF The Trainmaster 211 2 Lustig David May 2003 Whatever happened to SP s Popsicles Trains 63 5 23 ISSN 0041 0934 Pinkepank Jerry A Marre Louis A 1979 Diesel Spotter s Guide Update Milwaukee WI Kalmbach Publishing ISBN 0 89024 029 9 Further reading EditLiddle S G Bonzo B B Purohit G P Stallkamp J A 1981 Future Fuels and Engines for Railroad Locomotives PDF Vol 2 Pasadena CA Jet Propulsion Laboratory Solomon Brian 2014 GE and EMD Locomotives The Illustrated History Minneapolis Minnesota Voyageur Press ISBN 978 0 7603 4612 9 External links EditSouthern Pacific TE70 4S on My Espee Modelers Archive Retrieved from https en wikipedia org w index php title M K TE70 4S amp oldid 1125911215, wikipedia, wiki, book, books, library,
