| A-3170 | |
| Powertype: | Diesel |
| Builder: | Lima-Hamilton Corporation |
| Builddate: | May 1950 – August 1951 |
| Buildmodel: | A-3170 (LS-1200) |
| Totalproduction: | 69 |
| Aarwheels: | B-B |
| Wheelbase: | 8 feet |
| Uicclass: | Bo′Bo′ |
| Length: | 47’ 10” |
| Locoweight: | 2505001NaN1 |
| Primemover: | Hamilton Engines and Machinery T89SA |
| Enginetype: | 4-stroke diesel |
| Aspiration: | Turbocharged |
| Cylindercount: | Inline 8 |
| Cylindersize: | 9x |
| Displacement: | 6107cuin |
| Generator: | Westinghouse 499A |
| Tractionmotors: | Westinghouse 362D (4) |
| Maxspeed: | 600NaN0 |
| Poweroutput: | 12000NaN0 |
| Tractiveeffort: | 745081NaN1 |
| Locobrakes: | Straight air |
| Trainbrakes: | Air |
| Operatorclass: | CR&I- DES-15b NH- DEY-6 NKP- LS-12 WAB- D12 |
| Locale: | North America |
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.
| Owner | Quantity | Road Numbers |
|---|---|---|
| Armco Steel | 710, E109, E110 | |
| Baltimore & Ohio Railroad | 320–329, 340–353 | |
| Erie Railroad | 660–665, to Erie Lackawanna in 1960, same numbers | |
| Chicago River and Indiana Railroad (New York Central Railroad) | 8406–8411 | |
| New York, New Haven and Hartford Railroad | 630-639 | |
| New York, Chicago and St. Louis Railroad (Nickel Plate Road) | 309–312, to Norfolk and Western in 1964, same numbers | |
| Terminal Railroad Association of St. Louis | 1200–1205 (1200 ex Lima-Hamilton demonstrator 1200) | |
| Wabash Railroad | 401–406, 408–411, to Norfolk and Western in 1964, same numbers | |
| 69 | ||
Two A-3170’s are preserved: