The EMD SD7 is a model of 6-axle diesel locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953. It had an EMD 567B 16- cylinder engine producing 1,500 horsepower (1.12 MW) for its six traction motors.

2024年12月17日 · A single locomotive could haul a 5,500-ton train on level track, climb grades as high as 5%, and negotiate curves of 23 degrees. The SD7 also featured another unique trait, EMD's own Flexicoil truck.

2023年5月16日 · The Electro-Motive Division’s original six-axle diesel-electric road switchers were the SD7 and SD9. Producing 1,500 and 1,750 hp, respectively, they set the stage for larger and more powerful six-axle locomotives that would come to dominate the industry. The first SDs sold in relatively small numbers.

The SD7 is a model of 6-axle diesel locomotive built by General Motors Electro-Motive Division between May 1951 and November 1953. It had an EMD 567B 16-cylinder engine producing 1,500 horsepower (1.12 MW) for its six traction motors.

Most SD7's at one time or another were assigned to the Northwestern Pacific, duty on the NWP required spark arrestors not only over the engine exhaust stacks but also the steam generator stack. See photo's for general shape and style. 2720 looks to have an F unit fuel tank fitted, which it retained as an SD7R 1507, see photo top of page...

2014年2月28日 · It was the first EMD six-axle freight diesel, an SD7, and was originally numbered EMD #990 and used as a demonstrator on many railroads. Southern Pacific purchased the locomotive on October 10, 1952 after a major overhaul by EMD personnel, and it …

The SD7 was General Motors Electro-Motive Division’s first foray into 6-axle power. The “SD” stood for Special Duty, while the 7 was carried over for the 4-axle GP7 series. This new series of locomotives provided extra tractive effort spread and weight distribution across the six-axle trucks.

SD7 Total Length: 60'-08.5" Wheel Diameter: 40" Truck Wheel Base: 13'-07" Height to Top Engine Hood: 13'-10.5" Height to Top Cab : 15'-00" Cab Width: 10'-00" Top of Walkway: 8'-08.5" Walkway Width: 5'-04.5" ... Train Shed Cyclopedia, Vol. 20, 58, 60, 64, 80; Back to …

The SD7 was General Motors Electro-Motive Division’s first foray into 6-axle power. The “SD” stood for Special Duty, while the 7 was carried over for the 4-axle GP7 series. This new series of locomotives provided extra tractive effort spread and weight di

The Chessie numbering put the SD7 diesels in at 1826-1830 and followed them at 1831-1840 with the SD9s. Model images provided on this page are from a variety of sources including the author's collection, eBay auction images, product catalogs, and others.