Diesel-electric locomotive manufactured between 1938 and 1953
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EMC/EMD SW1
PC #8589, still in PRR livery, switching at Pittsburgh 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 (1938-12) – November 1953 (1953-11)
Total produced
661
Specifications
Configuration:
• AAR
B-B
Gauge
4 ft 8+1⁄2 in (1,435 mm) standard gauge
Trucks
AAR Type A or 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 6-567B or 6-567A or 6-567AC
Engine type
V6 2-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)
Gear ratio
62:15
Performance figures
Maximum speed
65 mph (105 km/h)
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,[1] with a gap in production between March 1943 and September 1945 due to World War II.
The SW1 was the start of a long line of SW series switchers produced by EMD. It was complemented by the SW7 in 1949 and the SW8 in 1950.[1] SW1 production ceased in November 1953, with its replacement, the equally powerful SW600, starting production in February 1954.[1]
^ abcSchafer, Mike (1998). Vintage diesel locomotives. Osceola, WI: Motorbooks International. pp. 22–25. ISBN 0-7603-0507-2. OCLC 38738930.
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[citation needed] Ballard Terminal Railroad operates one locomotive, an EMDSW1 locomotive numbered 98 formerly owned by Milwaukee Road. The locomotive's...
Illinois Railway Museum. Retrieved 2008-06-27. Alberston, Bob. (1996). "EMD SD7-SP 1518, A precursor to all engines on rails today". Railfan & Railroad...
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Abandoned in 1988, this railroad rostered three diesel locomotives, an EMDSW1 and two Fairbanks-Morse H-16-44's. The railroad is notable as the last...
initially using second-hand equipment, the RTA took delivery of the first new EMD F40PH locomotives in 1976. That F40PH fleet is still in service today. The...
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of trackage. Power consisted of two Cleburne, Texas, rebuilt CF7s, one EMDSW1, and an ex-CMStP&P GP20. All of the Cadillac & Lake City's rail operations...
same train. Some of the other equipment includes former PRR #9408, an EMDSW1 switcher, a preserved Dinky, Brookville BMD 15-ton switcher, former Baltimore...
leased for several years and then purchased by E&LS. In 1985, the first EMD diesel, a GP-38 (E&LS 400) was purchased, followed shortly by additional...
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