ALCO S-1

The S-1 was a "switcher" (shunter) diesel locomotive built by the American Locomotive Company between 1940 and 1950. A total of five hundred and forty three were built mostly for use in the US but a small number were also sold abroad, five were exported to the Steel Company of Wales' Port Talbot and Margam Smelter in 1949-50 (as 801 to 805).

Information for 801-805
Number built:	5
Built:	1949-1950
Builder:	American Locomotive Company
Motor:	Alco 539 diesel
Power:	660 hp (490 kW)
Wheel arrangment:	Bo-Bo

They were the first Bo-Bo diesel electrics to arrive in Britain after the Second World War and the first American built locomotives in Europe. They survived in service at Port Talbot until the mid-1980s, one reason for their withdrawal was that they required a two man crew compared to other shunters. Three were preserved, two of which are at the Nene Valley Railway and the adjoining Railworld attraction.

804 at Railworld

Cab area of 804

804 carries a fictitious "Union Pacific" livery

804's "nose"

804 was in light blue with wasp stripes livery in service