General Motors’ Electro-Motive Corporation built a total of 661 600-horsepower EMD SW1 switcher locomotives between December 1938 and November 1953.

The Pennsylvania Railroad with 85 and the New York Central Railroad with 81 were among the railroads with the most SW1 locomotives.

At a Glance

  • Length: 44 feet, 11 1/4 inches
  • Height 14 feet, 4 5/8 inches
  • Width 10 feet
  • Weight 196,000 pounds
  • Wheel Diameter: 40 inches
  • Minimum Curve: 57 degrees
  • Wheelbase 30 feet