EMD GP9
An EMD GP9 equipped with dynamic brakes on the Shenandoah Valley Railroad in Staunton, VA.
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| Type and origin | |
|---|---|
| Power type | Diesel-electric |
| Builder |
General Motors Electro-Motive Division (EMD) General Motors Diesel (GMD) |
| Build date | January 1954 – August 1963 |
| Total produced | 4,112 (and 165 B units) |
| Specifications | |
|---|---|
| AAR wheel arr. | B-B |
| Gauge |
4 ft 8 1⁄2 in (1,435 mm) standard gauge 5 ft 3 in (1,600 mm) (Brazil) |
| Trucks | EMD Bloomberg B (Flexicoil on some CN units) |
| Wheel diameter | 40 in (1.016 m) |
| Minimum curve | 21° (273 ft (83.21 m) radius) |
| Wheelbase | 40 ft (12.19 m) |
| Length | 56 ft 2 in (17.12 m) |
| Width | 10 ft 3 1⁄2 in (3.14 m) |
| Height | 15 ft 1⁄2 in (4.58 m) |
| Loco weight | 259,500 lb (117,700 kg) |
| Fuel capacity | 1,100 US gal (4,200 l; 920 imp gal) |
| Prime mover | EMD 567C |
| RPM range | 835 max |
| Engine type | V16 Two-stroke diesel |
| Aspiration | Roots-type supercharger |
| Displacement | 9,072 cu in (148.66 L) |
| Generator | EMD D-12-B |
| Traction motors | (4) EMD D-37-B |
| Cylinders | 16 |
| Cylinder size | 8 1⁄2 in × 10 in (216 mm × 254 mm) |
| Performance figures | |
|---|---|
| Power output | 1,750 hp (1.30 MW) |
| Tractive effort | 64,750 lbf (288.0 kN) |
| Career | |
|---|---|
| Locale | North America, South America |
An EMD GP9 is a four-axle diesel-electric locomotive built by General Motors' Electro-Motive Division in the United States, and General Motors Diesel in Canada between January, 1954, and August, 1963. US production ended in December, 1959, while an additional thirteen units were built in Canada, including the last two in August, 1963. Power was provided by an EMD 567C sixteen-cylinder engine which generated 1,750 horsepower (1.30 MW). This locomotive type was offered both with and without control cabs; locomotives built without control cabs were called GP9B locomotives. All GP9B locomotives were built in the United States between February, 1954, and December, 1959.
A total of 3,441 units of this locomotive model were built for American railroads, with an additional 646 for Canadian railroads and 10 for Mexican railroads. 5 units were built for a railroad in Brazil, 4 units were built for a railroad in Peru and 6 units were built for a railroad in Venezuela. Of the GP9B, 165 examples were built for American railroads.
There were 40 GP9M units built that are included in the 3,441 units built for United States railroads. A GP9M was built with parts from another older EMD locomotive, either an F unit or a damaged GP7. The use of parts from these older locomotives caused the GP9Ms to have a lower power rating than a GP9. This would be either 1,350 horsepower (1.01 MW) if the donor locomotive was an FT/F2 or 1,500 horsepower (1.12 MW) from F3/F7/GP7 locomotives.
Many rebuilt GP9s remain in service today with shortline railroads and industrial operators. Some remain in rebuilt form on some major Class I railroads, as switcher locomotives. Canadian National still has many GP9RM locomotives in operation, as of 2016. Canadian Pacific had many GP9u locomotives in operation; however, they were all retired in 2015.
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Wikipedia