<kuid2:327871:100196:2> Rock Island SW 1 #

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Rock Island SW 1

Built by the Electro-Motive Corporation before it became an official division of General Motors,the 44 foot 5 inch SW1 was the second model produced in the SW switcher series and the last. The SW1 was very popular with railroads with 661 examples built, but it never sold quite as well as its counterparts like the NW2. Today, this little switcher, just as with the NW2, continues to soldier on in on shortlines and industrial services as well as pulling excursion and tourist trains. The very first SW1 built in early 1939 is at the California State Railroad Museum in Sacramento, California. There are at least two dozen SW1s preserved. Note the taper of the hood to the cab, which was a two-stage taper or step design in earlier units but became a single taper in later production. Very early locomotives were delivered with a stubby exhaust stack, but this did not lift the diesel exhaust sufficiently clear of crew visibility. All later units were delivered with EMD's standard conical switcher stack as seen on this version, while early units were generally modified with taller stacks too. Early locomotives had a single large headlight, while later had twin sealed-beam headlights. In 1935, it was a 600hp switcher powered by it's 503cid '201' engine. Developement of the 201 resulted in a 12 cylinder version capable of delivering 900hp, and embracing General Electric traction motor technology in 1939, EMD issued the NW1 - N for nine hundred horsepower, W for welded frame.The same year, production of the 201 engine ceased with the introduction of the 567cid power unit; and EMD issued the first switcher powered by the new engine, the SW1. The S originally stood for six hundred horsepower, but this convention was dropped for later models. The 6 cylinder SW1 remained in production until 1953.In October 1949, the SW7 model, a 12 cylinder, 1200 horsepower version was issued, and 493 units were constructed before the introduction of the SW9 in Jan. 1951.From 1954, EMD issued the 600hp SW600, 900hp SW900, and the 1200hp SW1200, powered by 6, 8 and 12 cylinder configurations of the 567C power unit respectively. Production of the 567 ceased in 1966, with the introduction of the 645cid engine, which powered the later SW1000, SW1500 and their derivatives. Thanks to crb001 for script configuration. Modified Auran Art Pack SW7 mesh into EMD SW1 switcher mesh with undecorated reskin by majekear.

Reskinned with permission of Majekear by fourteen