EMD F9

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EMD F9
D&RGW F9 #5771 in 2009. Note the carbody filter grille ahead of the front porthole, the only reliable distinguishing feature of an F9.
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) General Motors Diesel (GMD, Canada) Model F9 Build date February 1953 – May 1960 Total produced 101 A units, 156 B units
Specifications Configuration: ​  • AAR B-B Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge 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 8 in (3.25 m) Height 15 ft (4.57 m) Prime mover EMD 16-567C RPM range 275-835 Engine type V16 Two-stroke diesel Aspiration Roots blower Displacement 9,072 cu in (148.66 L; 32.70 imp gal) Cylinders 16 Cylinder size 8+1⁄2 in × 10 in (216 mm × 254 mm)
Performance figures Maximum speed 65–105 mph (105–169 km/h) Power output 1,750 hp (1.30 MW)
Career Locale North America

The EMD F9 is a 1,750 horsepower (1,300 kW) Diesel-electric locomotive produced between February 1953 and May 1960 by the Electro-Motive Division of General Motors (EMD) and General Motors Diesel (GMD). It succeeded the F7 model in GM-EMD's F-unit sequence. Final assembly was at GM-EMD's La Grange, Illinois plant. The F9 was also built in Canada by General Motors Diesel at their London, Ontario plant. A total of 101 cab-equipped lead A units and 156 cabless booster B units were built. The F9 was the fifth model in GM-EMD's highly successful "F" series of cab unit diesel locomotives.

By the time cab units such as the F9 were built, railroads were turning to the road switcher-style of locomotive, as they had much better visibility from the cab without the need to lean out the window. The F9 was succeeded in most part by the EMD GP9.