The ALCO S-2 and S-4 are 1,000-horsepower (746 kW) diesel electric switcher locomotives produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). [1] Powered by turbocharged, 6-cylinder ALCO 539 diesel engines, the two locomotives differed mainly in their trucks: the S-2 had ALCO "Blunt" trucks; the S-4, AAR type A switcher trucks.

2025年1月9日 · The S2 was the second switcher model Alco produced although it was constructed at the same time as the earlier S1. One of the significant differences between the two models was the increased horsepower of the S2, which was a …

Sources of information: Extra 2200 South, Diesel Era, The Short Line and The Canadian Trackside Guide. Model: ?

Alco S-2 and S-4 Data Sheet

One of the most popular switching locomotives in North America during the 1940s and 50s was the ALCO-GE Model S-2 (specification E1540). 2502 of these thousand-horsepower units were built from April 1940 through December 1949.

2023年1月1日 · The ALCO S2 and S4 were 1,000 horsepower (746 kW) diesel electric switchers produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). The two locomotives differed only in trucks, with the S-2 using ALCO "Blunt" trucks, and the S-4 using AAR type A switcher trucks.

An ALCO S-2 Roster will show these occupied 4 distinct number series, in 3 different classes. Differences were limited to minor mechanical things and marginal variation in weight. Some …

The S-series rode on Alco’s own Blunt trucks, named for the in-house engineer who designed them to negotiate the tight turns and less-than-perfect track often found on switching assignments. Introduced just in time for World War II’s crush of traffic, the S-2 became a best-seller.

The ALCO S-2 and S-4 are 1,000-horsepower (746 kW) diesel electric switcher locomotives produced by ALCO and Canadian licensee Montreal Locomotive Works (MLW). Powered by turbocharged, 6-cylinder ALCO 539 diesel engines, the two locomotives differed mainly in their trucks: the S-2 had ALCO "Blunt" trucks; the S-4, AAR type A switcher trucks.

Sit back and relax for the next 11 minutes or so, and you will be treated to the sight and sounds of some great sounding ALCO S-2's. They are powered by Alco's inline 6 cylinder 539T....