EMD F7

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EMD F7
Santa Fe Railway F7 #309 with the Grand Canyon Limited on August 19, 1967
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) General Motors Diesel (GMD, Canada) Model F7 Build date February 1949 – December 1953 Total produced 2,393 A units 1,463 B units
Specifications Configuration: ​  • AAR B-B  • UIC Bo’Bo’ Gauge 4 ft 8+1⁄2 in (1,435 mm) Trucks Blomberg B Wheel diameter 40 in (1,016 mm) Minimum curve 23° (250.79 ft or 76.44 m radius) Wheelbase 39 ft (11.89 m) Length A unit: 50 ft 8 in (15.44 m) B unit: 50 ft 0 in (15.24 m) Width 10 ft 7 in (3.23 m) Height 15 ft (4.57 m) Loco weight 247,300 lb (112,200 kg) Prime mover EMD 16-567B RPM range 800 Engine type Two-stroke V16 diesel Aspiration Roots blower Displacement 9,072 cu in (148.66 L) Generator EMD D-12 Traction motors (4) EMD D-27-B Cylinders 16 Cylinder size 8+1⁄2 in × 10 in (216 mm × 254 mm)
Performance figures Maximum speed 65–102 mph (105–164 km/h) Power output 1,500 hp (1,100 kW) Tractive effort Starting: 56,500 lbf (251 kN) @25% Continuous: 40,000 lbf (180 kN) @9.3 mph (15 km/h)
Career Locale North America

The EMD F7 is a model of 1,500-horsepower (1,100 kW) diesel-electric locomotive produced between February 1949 and December 1953 by the Electro-Motive Division of General Motors (EMD) and General Motors Diesel (GMD).

Although originally promoted by EMD as a freight-hauling unit, the F7 was also used in passenger service hauling trains such as the Santa Fe Railway's high-speed flagship trains, the Super Chief, & El Capitan, and the Ontario Northland's Northlander.