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.

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:

• 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

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