EMD SW1

EMC/EMD SW1

PC #8589, still in PRR livery, switching at Pittsburgh, Pennsylvania in 1970.

Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Corp (later Division) (EMC/EMD) Model SW1 Build date December 1938 – November 1953 Total produced 661

Specifications AAR wheel arr. B-B Gauge 4 ft 8 ^1⁄2 in (1,435 mm) standard gauge Trucks AAR type A and BBA TYPE B Wheel diameter 40 in (1,016 mm) Minimum curve 57° (104.79 ft or 31.94 m) Wheelbase 30 ft (9.14 m) Length 44 ft 11 ^1⁄4 in (13.70 m) Width 10 ft (3.05 m) Height 14 ft 4 ^5⁄8 in (4.38 m) Loco weight 196,000 lb (89,000 kg) Prime mover EMD 567 or 567A or 567B Engine type V6 Two stroke diesel Aspiration Roots-type supercharger Displacement 3,402 cu in (55.75 L) Generator GM D-4 Traction motors (4) GM D-7A Cylinders 6 Cylinder size 8 ^1⁄2 in × 10 in (216 mm × 254 mm)

Performance figures Power output 600 hp (447 kW) Tractive effort 49,000 lb (22,000 kg)

Career Locale United States Mexico

The EMD SW1 is a 600-horsepower (450 kW) diesel-electric switcher locomotive built by General Motors' Electro-Motive Corporation (later Division) between December 1938 and November 1953. Final assembly was at EMD's plant at LaGrange (McCook) Illinois. The SW1 was the second generation of 3,402 cu in (55.75 L) switcher from EMD, succeeding the SC (cast frame) and SW (welded frame). The most significant change from those earlier models was the use of an engine of EMD's own design, the then-new 567 engine, here in 600 hp (450 kW) V6 form. 661 locomotives of this design were built, not withstanding diesel switcher production having been suspended between 1942 and 1945 by the War Production Board, as the 567 engines were needed elsewhere, mainly for U.S. Navy LST vessels.

Engine and powertrain

The SW1 introduced a 6-cylinder version of the 567 (later 567A) series engine to EMC/EMD switchers. Developing 600-horsepower (450 kW) at 800 rpm., this engine remained in production until 1966. Designed specifically for railroad locomotives, this was a supercharged 2 stroke 45 degree V type, with an 8 ¹⁄₂ by 10 in (216 by 254 mm), bore by stroke, giving 567 cubic inches (9.29 L) displacement per cylinder. A D.C. generator provides power to four motors, two on each truck, in a B-B arrangement. The SW1, like most EMD switchers, use the AAR Type A switcher truck. EMC/ EMD has built all its own components since 1939.^[1][2]

Production changes

Like most long-running locomotive models, a number of changes were made to the SW1 over its production life. Internally, the post-1945 locomotives were somewhat improved, and used an updated 567A engine.

One easily spotted change is the shape of the two center cab windows over the hood, which were curved to follow the roofline originally, but became flat-topped after mid-1950. Another easily seen is the taper of the hood to the cab, which was a two-stage taper in earlier units but became a single taper in later production. Very early locomotives were delivered with a stubby exhaust stack, but this did not lift the diesel exhaust sufficiently clear of crew visibility. All later units were delivered with EMD's standard conical switcher stack, while early units were generally modified with taller stacks too. Early locomotives had a single large headlight, while later had twin sealed-beam headlights.^[3]

Identification

The SW1 appears very similar to its SC and SW predecessors, but has only a single stack instead of two, a significantly shorter hood and a larger rear platform, no small louvers on the front top hood sides, and a large grille instead of lifting vents on top of the hood front. The sandbox in front of the radiator is somewhat smaller on the SW1.

Compared to later EMD switchers, the SW1 has a much shorter hood, large platforms at each end, a single exhaust stack, and a large 'satchel' type sandbox.

Original owners

Railroad	Quantity	Road numbers	Notes
Allegheny and South Side Railway	1	101
Allis-Chalmers	1	8
Angelina and Neches River Railroad	1	10
Atlantic and East Carolina Railway	1	9
Atlantic Coast Line Railroad	1	1901	Rejected, to Richmond Terminal Railroad #1
Baltimore and Ohio Railroad	22	200–221	#208, B&O renumbered to #8408, is currently owned by Wilmington & Western Railroad. 2nd oldest SW1 in routine scheduled service.
Ballard Terminal Railroad	1	98
Boston and Maine Railroad	24	1109–1132	1109 owned by RMNE. Thomaston, CT
Broward County Port Authority	1	400
Buffalo Creek Railroad	1	42
Canton Railroad	5	21–25
Central Indiana Railroad	1	1
Central of Georgia Railroad	3	2, 3, 7
Central of New Jersey	4	1109–1112
Chattanooga Traction Company	1	4
Chicago and Eastern Illinois Railroad	5	95–99	99 to MP 6001, now Dardanelle & Russellville 16
Chicago and North Western Railway	20	1207–1212, 1214, 1215, 1268–1270, 1272–1278, 1271, 1279
Chicago District Electric Generating	2	3, 4
Chicago Short Line Railway	2	200–201
Chicago, Burlington and Quincy Railroad	20	9136–9153
Chicago, Indianapolis and Louisville Railroad	3	DS-50, 5, 6	DS-50 renumbered to 1
Chicago, St. Paul, Minneapolis and Omaha Railway	1	55
Chihuahua Forests	1	500	only unit exported
Cleveland Quarries	1	2
Commonwealth Edison	6	10–15
Conemaugh and Black Lick Railroad	6	60–65
Delaware, Lackawanna and Western Railroad	11	427–437
Detroit Edison	3	210–212
Detroit, Toledo and Ironton Railroad	2	900–901	re-engined with 8-567B 800 hp engines, new hoods 1952. Reclassified SW8.
Donner-Hanna Coke	1	1
Elgin, Joliet and Eastern Railroad	27	220–246
EMD (demonstrator units)*	7	755, 804, 905, 906, 911, 700, 152	EMC 755 was the first SW1
Erie Railroad	1	360
Fort Worth and Denver Railway	2	602, 604
Fort Worth Belt	1	1
Galveston Wharves	5	201–205	201 to Dardanelle & Russellville 15
Garden City Western Railway	1	201
Georgia and Florida Railroad	3	70–72
Georgia Marble Company	1	1
Granite City Steel	2	600–601
Great Lakes Steel	14	12, 14–18, 22, 30, 31, 33–36, 38
Great Northern Railway	9	5101–5105, 80–83	5101–5105 renumbered
Great Western Railway of Colorado	2	61, 62
Hanna Furnace Company	3	14–16
Houston Belt and Terminal Railway	1	10
Illinois Central Railroad	19	9014–9032
Inland Steel Company	12	54, 57, 70–73, 76–81
Lehigh Portland Cement Company	1	5
Lehigh Valley Railroad	6	112–119	#114 is currently owned by Wilmington & Western Railroad. Oldest SW1 in routine scheduled service.
Louisiana Midland Railway	1	11
Louisville and Nashville Railroad	5	11–15
Manufacturers' Junction Railway	1	6
Maryland and Pennsylvania Railroad	1	70
Mathieson Chemical	2	1–2
McLouth Steel	3	3–5
Memphis union station	1	10
Metropolitan Sanitary District of Greater Chicago	3	1–3
Milwaukee Road	25	1610–1634	renumbered
Missouri Pacific Railroad	10	9004–9006, 9011, 9200–9205
Nashville, Chattanooga and St. Louis Railway	1	15
New York Central Railroad	81	600–621 (first), 622–654, 580–599, 600–621 (second)
Nickel Plate Road	2	105–106
Pennsylvania Railroad	85	5910, 5944–5953, 5987–5999, 9104, 9137–9154, 9200–9203, 9205-9209, 9396–9428
Pere Marquette Railroad	2	10–11
Phelps Dodge Corporation	1	A
Philadelphia, Bethlehem and New England Railroad	9	212–218, 220, 221
Public Service Company of Northern Illinois	3	9–11
Portland Traction Company (Oregon)	2	100, 200
Reading Railroad	9	16–23
Republic Steel	22	50–54, 300–306, 340–341, 352, 370–372, 890–891, 893–894
Chicago, Rock Island and Pacific Railroad	18	529–546
Roscoe, Snyder and Pacific Railway	1	100
Sahara Coal Company	2	(no numbers)
Seaboard Air Line Railroad	1	1200
Soo Line Railroad	1	320
Southern Railway	9	2002–2004, 2007–2011, 8565
Southern Pacific Railroad	14	1004–1016
St. Joseph Belt Railroad	1	11
St. Joseph Terminal Railroad	2	1–2
St. Louis – San Francisco Railway	1	10
Tennessee Coal and Iron Railroad	4	1000–1003
Terminal Railroad Association of St Louis	8	501–508
Union Railroad	22	455–476
US Department of Defense (US Army)	4	7001–7004
Wabash Railroad	11	101–111
Warner Sand and Gravel Company	1	15
Western Pacific Railroad	2	502–503	WP 501 was ex-EMC 906
Wheeling Steel Company	4	1001–1004
North Western Railway of Mexico	1	500

• There were 7 units built as EMD demonstrators: #152 (to Scullin Steel #6), 700 (to Manufacturers' Junction Railway #7), 755 (to Inland Steel #51), 804 (to Southern Pacific Railroad #1000, pictured above), 905 (to Central of Georgia #1), 906 (to Western Pacific Railroad #501), 911 (to Great Lakes Steel #11)
• As of 2013, Amtrak still has one SW1 on their roster. #737 is used for switching chores at the Wilmington Delaware shops.

Preservation

An SW1 at the Heart of Dixie Railroad Museum in Calera, Alabama.

• The first SW1 built by EMC in 1939 is now preserved at the California State Railroad Museum in Sacramento, California. The locomotive worked for Holly Sugar in Santa Ana and Tracy as the company's number 1. The museum donation was a coordinated effort between the museum, the Pacific Coast Chapter of the Railway and Locomotive Historical Society and Spreckels Sugar (the locomotive's last owner).
• EMC demonstrator 906, sold to the Western Pacific Railroad as their 501, is preserved at the Western Pacific Railroad Museum at Portola, CA. It has been restored back to its original WP image. This locomotive was the Western Pacific's first diesel-electric engine.
• Another former Western Pacific SW1 is also preserved at the California State Railroad Museum. Later sold to WP subsidiary Sacramento Northern, this engine is preserved as SN 402, painted in the famous silver and orange "Zephyr" colors that the WP roads used through the 1950s and 1960s.
• The Zanesville & Western Scenic Railroad Operates a preserved SW1 on its scenic line in Fultonham, Ohio.
• The Wilmington and Western Railroad owns and operates two SW1s in tourist passenger service. One is from the Baltimore and Ohio, and the other is from the Lehigh Valley.
• The Baltimore & Ohio Railroad Museum, Baltimore, MD has former SW1 Pere Marquette Railway #11 in operating condition at last report.
• The Milwaukee Road Heritage Center operates a Black (Soon to be Painted into MILW Road's paint scheme) SW1 that was former NSP Northern States Power X-5, Ex-Burlington Northern 79, Exx- Chicago Burlington & Quincy 9137. Built in June 1939, the locomotive is in running condition, with its original Electro-Motive Division 6-567B-1 Prime Mover.^[4]
• The Indiana Transportation Museum owns two SW1's, Monon Railroad #50 the first diesel locomotive to run on the Monon, Operating, & ITMZ #860 currently waiting for restoration (ex-Cenex Harvest States Cooperative #860, exx-Milwaukee Road #867).
• The Illinois Railway Museum has former Commonwealth Edison SW1 #15. This unit is in operating condition and is one of the most frequently used diesels on the property.
• The Minnesota Transportation Museum operates Andersen Windowalls 3110, which was donated by the Andersen Corporation in 2001. It was previously Norfolk and Western Railway 3110 and originally Wabash Railroad 110, built in June 1949.
• Metra commuter rail inherited two SW1s from the Rock Island. The two engines are used for Yard Service and power on work trains on the Metra Electric and Rock Island lines. Built in 1939 and 1945, they are rumored to be two of the oldest operating diesels in Illinois.
• FirstLight Power Resources actively operates a yellow SW1 with road number 1849 as a coal train yard switcher at the Mt. Tom Power Plant in Holyoke, Massachusetts This is ex Boston & Maine #1113.
• Sahara Coal SW1 #6 was purchased in the 1990s by the Crab Orchard and Egyptian Railroad in Marion, Illinois and is still in operation.
• Southern Pacific #1006 is at the Orange Empire Railway Museum.^[5]

See also

• List of GM-EMD locomotives

Notes

1. Pinkepank, Jerry A (1973). The Second Diesel Spotter’s Guide. Kalmbach Books. pp. 10, 26, 35. LCCN 66-22894.
2. Ross, David, ed. (2003). The Encyclopedia of Trains and Locomotives. p. 264. ISBN 978-0-7607-9679-5.
3. Pinkepank, Jerry A (1973). The Second Diesel Spotter’s Guide. Kalmbach Books. p. 35. LCCN 66-22894.
4. http://www.montevideomrhc.org/
5. http://www.oerm.org

References

• Dorin, Patrick C. (1972). Chicago and NorthWestern Power. Superior Publishing. p. 96. ISBN 0-87564-715-4.
• Pinkepank, Jerry A. (1973). The Second Diesel Spotter’s Guide. Milwaukee, WI: Kalmbach Publishing Company. ISBN 0-89024-026-4.
• (July 2005), "Preservation Briefs", Trains Magazine, p. 71.
• TrainWeb.com. The Unofficial EMD homepage. Retrieved on January 7, 2005. Contains fairly complete builders' records for early EMD production.
• Andersen Windows 3110. Retrieved on December 7, 2012

External links

• Media related to EMD SW1 locomotives at Wikimedia Commons