Lima LS-1200

The A-3170 (LS-1200) is a diesel-electric switcher locomotive built between May 1950 and August 1951, by the Lima-Hamilton Corporation of Lima, Ohio, United States. Lima's original design was the A-3080, a 1,000 hp (750 kW) switcher, which became the standard for Lima's designs. A 660 hp (490 kW) switcher (proposed specification number A-3081) had also been designed at the request of American Rolling Mill Company, but none were built. By changing fuel rack settings, the A-3080 was upgraded to the A-3170 producing 1,200 horsepower (890 kW) from a turbocharged Hamilton T89SA four-stroke, eight cylinder inline diesel engine, a Westinghouse generator and 4 Westinghouse traction motors provided the 74,508 lbf (331.43 kN) of tractive effort.

A-3170
Type and origin
Power typeDiesel
BuilderLima-Hamilton Corporation
ModelA-3170 (LS-1200)
Build dateMay 1950 – August 1951
Total produced69
Specifications
Configuration:
​
 • AARB-B
 • UICBo′Bo′
Gauge4 ft 8+1⁄2 in (1,435 mm)
Wheelbase8 feet
Length47’ 10”
Loco weight250,500 lb (113.6 t)
Prime moverHamilton Engines and Machinery T89SA
Engine type4-stroke diesel
AspirationTurbocharged
Displacement6,107 cu in (100.08 L)
GeneratorWestinghouse 499A
Traction motorsWestinghouse 362D (4)
CylindersInline 8
Cylinder size9 in × 12 in (229 mm × 305 mm)
Loco brakeStraight air
Train brakesAir
Performance figures
Maximum speed60 mph (97 km/h)
Power output1,200 hp (895 kW)
Tractive effort74,508 lbf (331.4 kN)
Career
ClassCR&I- DES-15b NH- DEY-6 NKP- LS-12 WAB- D12
LocaleNorth America

Lima-Hamilton did not assign model numbers to their models but referred to them by specification numbers. Model designations such as LS-1200 were a railfan invention. Lima-Hamilton assigned A-3170 as the specification number for this particular unit. The Southern Pacific ordered 60 locomotives but agreed to receive 84 S12s from BLH instead.

Original owners
Owner Quantity Road Numbers
Armco Steel
3
 710, E109, E110
Baltimore & Ohio Railroad
24
 320–329, 340–353
Erie Railroad
6
 660–665, to Erie Lackawanna in 1960, same numbers
Chicago River and Indiana Railroad (New York Central Railroad)
6
 8406–8411
New York, New Haven and Hartford Railroad
10
 630-639
New York, Chicago and St. Louis Railroad (Nickel Plate Road)
4
 309–312, to Norfolk and Western in 1964, same numbers
Terminal Railroad Association of St. Louis
6
 1200–1205 (1200 ex Lima-Hamilton demonstrator 1200)
Wabash Railroad
10
 401–406, 408–411, to Norfolk and Western in 1964, same numbers
69

Preservation

Two A-3170’s are preserved:

References
  • Kirkland, John F. (November 1985). The Diesel Builders Volume 1: Fairbanks-Morse and Lima-Hamilton. Interurban Press. ISBN 0-916374-69-6.
  • Hirsimaki, Eric (1986). Lima – the History. Hundman Publishing Inc.
  • "The Yard Limit - Lima". Retrieved March 9, 2009.
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