Hidden in the back of the Lionel ... proven Alco S2 switcher. The S2 was one of Alco's most reliable and successful locomotives. Powered by a turbocharged inline 6 cylinder engine, it pumped ...

Thus was born the 41 gas turbine switcher. Two years later, Lionel took the same tooling and created the 42, selecting the name because the company had contracts to design precision instruments ...