Southern Pacific #7399
Southern Pacific SD44R
Type and origin
Power typeDiesel
BuilderElectro-Motive Division (EMD)
Serial number32028
ModelSD45
SD44R
Build dateSeptember 1966
Rebuild dateOctober 1981
Specifications
Configuration:
​
 • AARC-C
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Length65 feet 8 inches (20.02 m); 65 feet 9+1⁄2 inches (20.053 m) on some units starting early 1968.
Loco weight368,000 pounds (167,000 kg)
Prime mover8837: EMD 20-645E3
7399: EMD 16-645E3
Engine type8837: V20 diesel
7399: V16 diesel
GeneratorAR10B
Cylinders8837: 20
7399: 16
Performance figures
Maximum speed71 miles per hour (114 km/h)
Power output8837: 3,600 hp (2,680 kW)
7399: 3,000 hp (2,240 kW)
Tractive effortStarting: 92,000 lbf (410 kN)
Continuous: 82,100 lbf (365 kN) @ 11 mph (18 km/h)
Career
OperatorsSouthern Pacific Transportation Company, Union Pacific Railroad, EMDX
NumbersSP 8837 (1966-1981), SP 7399 (1981-1998) 4766 (1998-1999) EMDX 2816 (1999-present)
RetiredOctober 31st, 1998
Current ownerEMDX
DispositionOperational under EMDX as #2816

Southern Pacific 7399 (also known as the Southern Pacific SD44R) is the sole example of an SD44R diesel locomotive that was built by the Electro-Motive Division for the Southern Pacific Transportation Company in September of 1966.[1][2]

History

Southern Pacific 7399 was constructed in September of 1966 as Southern Pacific SD45 #8837 and it was delivered to the Southern Pacific Transportation Company that same year in 1966.[1][2] Then, in October of 1981, #8837 was rebuilt by the Southern Pacific themselves under the Southern Pacific's M-99 rebuild program into an SD44R and renumbered to it to #7399, thus making #7399 the only example of the SD44R.[3]

No. 7399 was later repainted into the Southern Pacific's Daylight paint scheme along with SD40R #7342 and remained in that paint scheme until being repainted into the Southern Pacific's "Kodachrome" livery of the proposed merger between Southern Pacific and Santa Fe, but then, in November of 1981, 7399 was repainted into a second variant of the Daylight paint scheme. Until emerging with a new SP Scarlet and Daylight Orange long hood, along with a black roof, trucks, fuel tank, pilots and plows.[4]

It lasted into the days of Union Pacific when Southern Pacific and its parent company Rio Grande Industries had merged into Union Pacific.

No. 7399 was later retired from Union Pacific's roster and sold to EMDX on October 31st, 1998, and renumbered by EMDX as 2816, leased back to Union Pacific as UP SD40-2 #4766 on September 4th, 1999, and returned to EMDX.

As of 2013, Southern Pacific 7399 is currently operational with EMDX as EMDX #2816.

References

  1. 1 2 Shine (1988), p. 109
  2. 1 2 Shine (1991), p. 195
  3. ↑ "SP Rebuild Programs". utahrails.net. Retrieved 2023-09-26.
  4. ↑ Garmany (1981), p. 391

Further reading

  • Shippen, Bill (1999). Southern Pacific in Transition. Four Ways Publications. ISBN 9781885614261.
  • Garmany, John (1984). Southern Pacific Dieselization (1st ed.). Pacific Fast Mail. ISBN 978-0915713127.
  • Shine, Joseph (1988). SP 1987/88 Motive Power Pictorial (1st ed.). Four-Ways West Publications. ISBN 9780961687434.
  • Shine, Joseph (1991). SP into the '90's. Four Ways West Publications. ISBN 9780685752104.
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