ALCO S-6

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ALCO S-6
Hugh llewelyn 1231 (5963970156).jpg
SP #1231 at El Centro, California, in 1970.
Type and origin
Power type Diesel-electric
Builder ALCO
Model S-6
Build date May 1955 – December 1960
Total produced 126
Specifications
AAR wheel arr. B-B
UIC classification Bo′Bo′
Gauge 4 ft 8 12 in (1,435 mm)
Length 45 ft 5 in (13.84 m)[1]
Width 10 ft (3.05 m)
Height 14 ft 8 in (4.47 m)
Locomotive weight 230,000 lb (104.3 tonnes)
Fuel capacity 635 US gal (2,400 l; 529 imp gal)
Lubricant capacity 140 US gal (530 l; 120 imp gal)
Coolant capacity 110 US gal (420 l; 92 imp gal)
Sandbox capacity 26 cu ft (0.74 m3)
Prime mover ALCO 251A,B
Engine RPM range 375 – 1000 rpm
Engine type Four-stroke diesel
Displacement 668 cu in (10.95 l) per cylinder
4,008 cu in (65.68 l) total
Generator GE GT533
Traction motors GE 752 (4 off)
Cylinders Straight 6
Cylinder size 9 in × 10 12 in (229 mm × 267 mm)
Performance figures
Maximum speed 60 mph (97 km/h)
Power output 900 hp (670 kW)
Career
Locale United States, Mexico
Preserved Two [2]

The Alco S-6 (spec. DL 430) was a diesel-electric locomotive of the switcher type constructed by ALCO of Schenectady, New York; a total of 126 locomotives were built between May 1955 and December 1960. The S-6 was a development of the earlier S-5; instead of the 800 hp (600 kW) ALCO 251 engine on the previous locomotive, the S-6 used a 251A or 251B engine rated at 900 horsepower (670 kW). The locomotive rode on two-axle AAR trucks, giving a B-B wheel arrangement. A cow-calf version was produced exclusively for Oliver Iron Mining Company, who bought two: this was the SB-8/SSB-9 (DL-441). The freight train used to smash the DeLorean DMC-12 time machine in Back to the Future Part III was pulled by two Alco S-6 locomotives in Ventura County Railroad livery.

Original Owners[edit]

Railroad Quantity Road Number Notes
Allied Chemical Company 1 110
ARMCO Steel 1 1202
B. Perini & Sons Construction Company 1 101 to Upper Merion and Plymouth Railroad 101
Belt Railway of Chicago 1 420
Ferrocarril Chihuahua al Pacífico 1 60 Renumbered 106
Cia Fundidora de Hierro y Acero 3 1–3
Ferrocarril del Pacífico 24 701–723
Ferrocarriles Nacionales de México 1 5300
Northern Pacific Railway 1 750 to Burlington Northern Railroad 950
Ohio River Company (ORCo) 1 56
Republic Steel 3 153,317,318
Secretaria de Comunicaciones de Obras Publicas (SCOP) 3 7133-1,2,3 to Ferrocarril del Sureste (same numbers)
Sheffield Steel 2 15,16
Southern Pacific Railroad 70 1033–1082,4634–4645 renumbered 1200–1257, 1270–1281
South Buffalo Railway 6 40–45
Tennessee Copper 1 107
Upper Merion and Plymouth Railroad 1 61
U.S. Pipe and Foundry 1 38
Columbia Geneva Steel 1 1
Western Maryland Railroad 2 151,152
Ferrocarriles Unidos de Yucatán 1 301

See also[edit]

References[edit]

  1. ^ "ALCO S-6 Data Sheet". The Diesel Shop. Retrieved 2006-11-29. 
  2. ^ "Preserved Alco switchers". The Diesel Shop. Archived from the original on 22 June 2008. Retrieved 2008-05-26. 

External links[edit]