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Baldwin S-12

{{more footnotes needed|date=June 2017}}

{{Infobox locomotive

| name = Baldwin S12

| powertype = Diesel-electric

| image = 0390 Strasburg - Railroad Museum of Pennsylvania.jpg

| alt =

| caption = A preserved S-12 at the Railroad Museum of Pennsylvania.

| builder = Baldwin Locomotive Works

| buildmodel = S12

| builddate = January 1951–October 1956

| totalproduction = 451

| aarwheels = B-B

| gauge = {{Track gauge|ussg|allk=on}}

| trucks = AAR type A

| length = 48’

| width = 10’

| height = 14’

| wheeldiameter = {{convert|40|in|mm|0|abbr=on}}

| minimumcurve = 44° ({{convert|133.47|ft|m|2|abbr=on|disp=or}} radius)

| wheelbase = {{convert|30|ft|8|in|m|2|abbr=on}}

| locoweight = {{convert|240000|lb|kg|0|abbr=on}}

| fuelcap =

| primemover = 606A

| rpmrange = 625 rpm max

| enginetype = Four-stroke diesel

| aspiration = Turbocharger Elliott Company H503 (215 hp)

| displacement = {{convert|1979|cuin|L|abbr=on}} per cylinder
{{convert|11874|cuin|L|abbr=on}} total

| cylindercount = 6

| cylindersize = {{convert|12+3/4|x|15+1/2|in|mm|0|abbr=on}}

| generator = Westinghouse YG40D

| tractionmotors = Westinghouse 362D (4)

| maxspeed = {{convert|60|mph|km/h|0|abbr=on}}

| poweroutput = {{convert|1200|hp|kW|0|abbr=on}}

| tractiveeffort = Starting: {{convert|72000|lbf|kgf|abbr=on}} @30%

Continuous: {{convert|34000|lbf|kgf|abbr=on}} @{{convert|10.8|mph|kph|1|abbr=on}}

| locobrakes =

| trainbrakes =

| disposition = 6 preserved, remainder scrapped

| notes =

}}

{{Infobox locomotive

|name=Balwin DS-4-4-660 / DS-4-4-1000

|powertype=Diesel-electric

|builder=

|buildmodel=DS-4-4-660 / DS-4-4-1000

|builddate= 660: June 1946 to May 1949
1000: January 1951 – November 1951

|totalproduction= 660: 139
1000: 446

|aarwheels=B-B

|gauge={{RailGauge|ussg|allk=on}}

| trucks = AAR Type A truck

| wheeldiameter = {{convert|36|in|mm|0|abbr=on}}

| minimumcurve = 44° ({{convert|133.47|ft|m|2|abbr=on}} radius)

| wheelbase = {{convert|30|ft|8|in |m|2|abbr=on}}

| length = {{convert|46|ft|6+1/4|in|m|2|abbr=on}}

| width = {{convert|9|ft|11+1/4|in|m|2|abbr=on}}

| height = {{convert|14|ft|m|2|abbr=on}}

| locoweight = 660: {{convert|196600|lb|abbr=on}}
1000: {{convert|230000|lb|abbr=on}}

|primemover=660: Baldwin 606NA
1000: 608NA later 606SC

|rpmrange=625 rpm max.

|enginetype=606: Straight-6
608: Straight-8
Four-stroke diesel

|aspiration=606NA and 608NA: Natural
606SC: Turbocharged

|displacement={{convert|1979|cuin|L|abbr=on}} per cylinder
606: {{convert|11874|cuin|L|abbr=on}} total
608: {{convert|15832|cuin|L|abbr=on}} total

|cylindercount=6

|cylindersize={{convert|12+3/4|×|15+1/2|in|mm|0|abbr=on}}

|generator= West’hse 480 DC

|tractionmotors= (4) West’hse 362-D

|poweroutput=660: {{convert|660|hp|kW|0|abbr=on}}
1000: {{convert|1000|hp|kW|0|abbr=on}}

| tractiveeffort = 660: {{convert|56500|lb|abbr=on}}
1000: {{convert|57500|lb|abbr=on}}

| locobrakes=Air

| trainbrakes=Air

|locale=North America

}}

The Baldwin S-12 or BLH S12 is a {{convert|1,200|hp|kW|adj=on|lk=in}} diesel-electric switcher locomotive. Utilizing a turbocharged 6-cylinder version of the powerful 606A diesel prime mover, S12s were known for their "lugging" power, despite being temperamental. Like most BLH switchers, the S12 had AAR Type-A switcher trucks in a B-B wheel arrangement. 451 units were built between 1951 and 1956, when BLH left the locomotive market.

Previous models

Baldwin made a number of switchers with similar dimensions and body styles. The first body style, used in VO models, had a slightly pointed nose with a round radiator opening. The second and third body style, almost indistinguishable and used interchangeably, had a flat nose and rectangular radiator opening. Various exhaust stacks were used, and are not an effective spotting feature, except that turbocharged models always had one large stack offset to the side.

The VO-660 was built between April 1939 and May 1946. It was powered by a naturally aspirated six cylinder engine rated at {{convert|600|hp|kW|adj=on}}. 142 were built. Baldwin replaced the VO-660 with the model DS-4-4-660 in 1946.

The VO-1000 was built between January 1939 and December 1946. It was powered by a naturally aspirated eight cylinder engine rated at {{convert|1000|hp|kW|adj=on}}. Some had the Batz truck originally developed by the Atchison, Topeka and Santa Fe Railway as a leading truck for steam locomotives. 548 VO-1000s were built.

The DS-4-4-660 was built between 1946 and 1949. It replaced the {{convert|600|hp|kW|adj=on}} VO-660 as the low power companion to the DS-4-4-1000 models. 139 were built.

The DS-4-4-1000 was a {{convert|1000|hp|kW|adj=on}} model built between 1946 and 1951. The first units (56 locomotives) were powered by an 8-cylinder normally aspirated prime mover, but from 1948 a change was made to a 6-cylinder turbocharged engine. A total of 502 were built.

Original buyers

class="wikitable"

!Railroad !! Quantity !! Road number !! Notes

Baldwin-Lima-Hamiton (demonstrators)style="text-align:center;" |2style="text-align:center;" |1200–1201to Rock Island 758–759
Atlanta and West Point Rail Roadstyle="text-align:center;" |1style="text-align:center;" |678
Akron and Barberton Belt Railroadstyle="text-align:center;" |2style="text-align:center;" |27-28
American Smelting and Refining Companystyle="text-align:center;" |2style="text-align:center;" |1954–1955
Apache Railwaystyle="text-align:center;" |1style="text-align:center;" |600
Armco Steel, Hamilton, Ohiostyle="text-align:center;" |1style="text-align:center;" |706
Baltimore and Ohio Railroadstyle="text-align:center;" |5style="text-align:center;" |463–467Renumbered 9274–9278
Calumet and Hecla Mining Companystyle="text-align:center;" |1style="text-align:center;" |203
Central of Georgia Railwaystyle="text-align:center;" |4style="text-align:center;" |311–314
Central Railroad of New Jerseystyle="text-align:center;" |7style="text-align:center;" |1053–1059
Chicago and North Western Railwaystyle="text-align:center;" |16style="text-align:center;" |1073–1076, 1106–1109, 1117–1121, 1126–1128
Chicago, Milwaukee, St. Paul and Pacific Railroad (“Milwaukee Road”)style="text-align:center;" |21style="text-align:center;" |1905–1925Renumbered 900–914, 920–925 (not in order)
Copper Range Railroadstyle="text-align:center;" |1style="text-align:center;" |200
Erie Railroadstyle="text-align:center;" |12style="text-align:center;" |617–628
Erie Mining Companystyle="text-align:center;" |4style="text-align:center;" |400–403
Great Northern Railwaystyle="text-align:center;" |5style="text-align:center;" |24–28
Kansas City Southern Railwaystyle="text-align:center;" |4style="text-align:center;" |1160–1163
Lehigh Valley Railroadstyle="text-align:center;" |14style="text-align:center;" |230–243
Michigan Limestonestyle="text-align:center;" |2style="text-align:center;" |116–117
Missouri-Kansas-Texas Railroadstyle="text-align:center;" |15style="text-align:center;" |1201–1210Renumbered
Monongahela Railwaystyle="text-align:center;" |27style="text-align:center;" |400–426
Missouri Pacific Railroadstyle="text-align:center;" |20style="text-align:center;" |9200–9219Renumbered 1260–1279
Missouri Pacific (International-Great Northern Railroad)style="text-align:center;" |10style="text-align:center;" |9220–9226, 9230–9232
Missouri Pacific (St. Louis, Brownsville and Mexico Railway)style="text-align:center;" |3style="text-align:center;" |9227–9229
Missouri Pacific (Union Railway of Memphis)style="text-align:center;" |7style="text-align:center;" |9233–9239
McCloud River Railroadstyle="text-align:center;" |2style="text-align:center;" |30–31#31 built as 800 hp; convertible to 1,200 hp (but never converted)
New Orleans Public Belt Railroadstyle="text-align:center;" |2style="text-align:center;" |61–62
New York Central Railroadstyle="text-align:center;" |21style="text-align:center;" |9308–9328
Oliver Iron Mining Companystyle="text-align:center;" |1style="text-align:center;" |933
Patapsco and Back Rivers Railroadstyle="text-align:center;" |3style="text-align:center;" |345–347
Pennsylvania Railroadstyle="text-align:center;" |87style="text-align:center;" |8100–8104, 8732–8796, 8976–8993PRR Class BS-12m
Pennsylvania-Reading Seashore Linesstyle="text-align:center;" |11style="text-align:center;" |6017–6021, 6028–6033
Rayonier, Inc.style="text-align:center;" |2style="text-align:center;" |201–202
Seaboard Air Line Railroadstyle="text-align:center;" |10style="text-align:center;" |1462–1465, 1476–1481to Seaboard Coast Line Railroad 203–206, 217–222
Sierra Railroadstyle="text-align:center;" |2style="text-align:center;" |40, 42
Southern Railwaystyle="text-align:center;" |10style="text-align:center;" |2290–2299
Southern Pacific Companystyle="text-align:center;" |56style="text-align:center;" |1442–1513, 1539–1550
Southern Pacific (Texas and New Orleans Railroad)style="text-align:center;" |3style="text-align:center;" |105–107
Tennessee Coal, Iron and Railroad Companystyle="text-align:center;" |8style="text-align:center;" |1200–1207
Tennessee Valley Authoritystyle="text-align:center;" |4style="text-align:center;" |1–3, 200
Terminal Railroad Association of St. Louisstyle="text-align:center;" |4style="text-align:center;" |1250–1253
United States Air Forcestyle="text-align:center;" |2style="text-align:center;" |1841–1842
United States Armystyle="text-align:center;" |1style="text-align:center;" |65-11391
United States Navystyle="text-align:center;" |13style="text-align:center;" |65-00292–65-00294, 65-365–65-00374
U.S. Steel, Geneva Steel Worksstyle="text-align:center;" |3style="text-align:center;" |33–35
U.S. Steel, Homestead Steel Worksstyle="text-align:center;" |1style="text-align:center;" |GE1
U.S. Steel, Morrisville, Pennsylvania Worksstyle="text-align:center;" |9style="text-align:center;" |GE2–GE8, GE17–GE18
Wabash Railroadstyle="text-align:center;" |5style="text-align:center;" |305–309
Total451

Surviving units

At least 9 intact examples (as well as 1 conversion) of the S12 are known to survive at railroad museums and freight operations. SMS Lines owns 9 S12's and operates #301 at the Penn Warner industrial park in Morrisville, Pennsylvania, as well as #304 on the Woodstown Central in Salem County, New Jersey with 7 others in storage or awaiting restoration. One unit that was converted from a Baldwin DS-4-4-1000 is in service on the Whitewater Valley Railroad.

The US Navy operates two S12's (nos. 65-00367 and 65-00368) at Naval Weapons Station Earle in Monmouth County, New Jersey{{Cite AV media |url=https://www.youtube.com/watch?v=Hkwd-grYjBI |title=Full HD 60FPS: Navy Police Escort Train to Earle Weapons Station Main Base with Baldwin VO1000Ms |date=2024-05-25 |last=Jersey Shore Rail Productions |access-date=2024-11-02 |via=YouTube}}

References

{{reflist}}

  • {{Dorin-North Western|pages=158, 161–163}}
  • {{cite book|last=Pinkpank|first=Jerry A|title=The Second Diesel Spotter's Guide|year=1973|publisher=Kalmbach Books|lccn=66-22894|isbn=0-89024-026-4|pages=282, 287–291}}

External links

{{commons category|Baldwin S-12 locomotives}}

  • [http://yardlimit.railfan.net/baldwin/s-12/ Baldwin S-12]

{{Baldwin diesels}}

{{Diesel_Switchers}}

Category:B-B locomotives

S-12

Category:Diesel–electric locomotives of the United States

Category:Railway locomotives introduced in 1951

Category:Standard-gauge locomotives of the United States

Category:Shunting locomotives

Category:Baltimore and Ohio locomotives

Category:Chicago and North Western Railway locomotives

Category:Erie Railroad locomotives

Category:Milwaukee Road locomotives

Category:New York Central Railroad locomotives

Category:Pennsylvania Railroad locomotives

Category:Southern Pacific Railroad locomotives