EMD GP9E and GP9R
Southern Pacific GP9E #3765 is heading back toward Fremont after a run to Radum, outside Pleasanton in August 1985.
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division (EMD)
ModelGP9
GP9E
GP9R
Total produced340 (Southern Pacific)
60 (Cotton Belt)
Rebuild dateApril 1970 – March 1979
Number rebuilt283 (Southern Pacific)
10 (Cotton Belt)
Specifications
Configuration:
​
 • AARB-B
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
TrucksEMD Blomberg B
Wheel diameter40 in (1.016 m)
Minimum curve21° (273 ft (83.21 m) radius)
Wheelbase40 ft (12.19 m)
Length56 ft 2 in (17.12 m)
Width10 ft 3+1⁄2 in (3.14 m)
Height15 ft 1⁄2 in (4.58 m)
Loco weight259,500 lb (117,700 kg)
Fuel capacity1,100 US gal (4,200 L; 920 imp gal)
Prime moverEMD 16-567C
RPM range835 max
Engine typeV16 Two-stroke diesel
AspirationRoots blower
Displacement9,072 cu in (148.66 L)
GeneratorEMD D-12-B
Traction motors(4) EMD D-37-B
Cylinders16
Cylinder size8+1⁄2 in × 10 in (216 mm × 254 mm)
Performance figures
Maximum speed65 mph (105 km/h)
Power output1,750 hp (1.30 MW)
Tractive effort64,750 lbf (288.0 kN)
Career
OperatorsSouthern Pacific Transportation Company
St. Louis Southwestern Railway ("Cotton Belt Route")
LocaleNorth America
PreservedSee here
DispositionSix preserved, remainder scrapped

The EMD GP9E and GP9R are rebuilds from EMD GP9 diesel locomotives that were built by General-Motors Electro-Motive Division for the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") and the Southern Pacific Transportation Company.[1][2][3]

History

Beginning in 1970 with SP GP9 #3424, all of the pre-existing EMD GP9 diesel locomotives that were on the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") and Southern Pacific's roster were rebuilt into GP9E's and GP9R's with the number series beginning at #3300.[1][2][3]

Because of the internal differences of the three 'Phases', different 'rebuild' schemes were required, which meant that they were placed into different number series. As well some got Farr air filter boxes behind the cab of the units.[1]

As the rebuilds had came and went, alongside the un-rebuilt units, no numbers were reused from the Southern Pacific's 1965 renumbering scheme.[1]

The Southern Pacific Transportation Company began rebuilding their units in 1970, while the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") began rebuilding their units in 1974.[1]

SP's Paint scheme variants

SP GP9R #3792 in the Southern Pacific's "Kodachrome" livery.

Nine of Southern Pacific's GP9E/GP9R locomotives were painted into the Southern Pacific's "Kodachrome" livery of the Failed merger between Southern Pacific and Santa Fe, these units were GP9E/R locomotives #2873, #3370, #3735, #3739, #3775, #3778, #3784, #3792 and #3846.[1]

Preservation

Out of all the 283 units that were rebuilt, six EMD GP9R locomotives have survived into preservation:

See also

References

  1. 1 2 3 4 5 6 Strapac (1974), p. 23-28
  2. 1 2 Solomon (2000), p. 74
  3. 1 2 Solomon (2000), p. 168
  4. ↑ "Southern Pacific 2873". tour.wplives.org. Retrieved 2023-10-28.
  5. ↑ "WPRM - SP 2873". wplives.org. Retrieved 2023-10-28.
  6. ↑ "Southern Pacific #5623". Niles Canyon Railway. Retrieved 2023-10-28.
  7. ↑ "SP 3194: EMD GP-9". Golden Gate Railroad Museum. Retrieved 19 April 2020.
  8. ↑ "Southern Pacific #3709". Pacific Southwest Railway Museum. Retrieved 2023-10-28.
  9. ↑ "SP #3709". www.sdrm.info. Retrieved 2023-10-28.
  10. ↑ "Rolling Stock of the Utah State Railroad Museum: SP 3769: GP9". Utah State Railroad Museum: Spencer S. & Dolores Doré Eccles Rail Center. Ogden, Utah: Ogden Union Station. 2018. Archived from the original on 2018-09-03. Retrieved 2018-10-31.
  11. ↑ "Southern Pacific #3873". Pacific Southwest Railway Museum. Retrieved 2023-10-28.
  12. ↑ "SP #3873". www.sdrm.info. Retrieved 2023-10-28.

Bibliography

Further reading

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