EMD Model 40

The EMD Model 40 was a small two-axle diesel-electric switcher built by the Electro-Motive Corporation and then General Motors' Electro-Motive Division between August 1940 and April 1943. Eleven were built and are nicknamed critters. They used two General Motors Detroit Diesel 6-71 engines producing a combined 300 horsepower, and the drivetrain is unusual because both engines drive one DC generator from opposite sides, one turning clockwise and the other counter-clockwise. The first buyers were the Electro-Motive plant itself, which kept one as its number 2 plant switcher, the Defense Plant Corporation with four, the United States Army with three, the Navy with two and the General Motors Cleveland Diesel Division with one. A roster records the later owners, and several survive in museums, including at Duluth, Minnesota, North Judson, Indiana, and York, Pennsylvania.