The A-3170 (LS-1200) is a diesel-electric switching 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.

This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (January 2017)

A-3170
Type and origin Power type Diesel Builder Lima-Hamilton Corporation Model A-3170 (LS-1200) Build date May 1950 – August 1951 Total produced 69
Specifications Configuration: ​  • AAR B-B  • UIC Bo′Bo′ Gauge 4 ft 8+1⁄2 in (1,435 mm) Wheelbase 8 feet Length 47’ 10” Loco weight 250,500 lb (113.6 t) Prime mover Hamilton Engines and Machinery T89SA Engine type 4-stroke diesel Aspiration Turbocharged Displacement 6,107 cu in (100.08 l) Generator Westinghouse 499A Traction motors Westinghouse 362D (4) Cylinders Inline 8 Cylinder size 9 in × 12 in (229 mm × 305 mm) Loco brake Straight air Train brakes Air
Performance figures Maximum speed 60 mph (97 km/h) Power output 1,200 hp (895 kW) Tractive effort 74,508 lbf (331.4 kN)
Career Class CR&I- DES-15b NH- DEY-6 NKP- LS-12 WAB- D12 Locale North 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

Preservation

Two A-3170’s are preserved:

• ARMCO Steel E-110, the final locomotive produced by Lima- Hamilton, at the Illinois Railway Museum.
• Baltimore and Ohio 320, at the Whitewater Valley Railroad.

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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