Santa Fe CF7

The CF7 is an EMD F-unit railroad locomotive that has had its streamlined carbody removed and replaced with a custom-made, "general purpose" body in order to adapt the unit for switching duty. All of the conversions were performed by the Atchison, Topeka and Santa Fe Railway in their Cleburne, Texas workshops between February, 1970 and 1978.[1] This was Santa Fe's most notable remanufacturing project creating a total of 132 CF7s.[1] The program was initiated in response to a system-wide need for more than 200 additional four-axle diesel road switchers to meet projected motive power demands on branch lines and secondary main lines.

CF7
Locomotive #517, a CF7, is the main power on the Commonwealth Railway in Suffolk, Virginia.
Type and origin
Power typeDiesel-electric
BuilderGeneral Motors Electro-Motive Division (EMD);
rebuilt by the Atchison, Topeka and Santa Fe Railway, Cleburne, Texas shops
ModelCF7
Rebuild dateFebruary 1969/1970 – 1978
Number rebuilt132 or 233
Specifications
Configuration:
​
 • AARB-B
Gauge4 ft 8 1⁄2 in (1,435 mm)
Length48 ft 6 in (14.78 m)
Loco weight249,000 pounds (113 t)
Prime moverEMD 16-567BC
Engine type2-stroke diesel
AspirationRoots blower
Displacement9,072 cu in (148.7 liters)
CylindersV16
Cylinder size8.5 in × 10 in (216 mm × 254 mm)
TransmissionDC generator,
DC traction motors
Loco brakeStraight air
Train brakes26 L air
Performance figures
Maximum speed65 mph (105 km/h)
Power output1,750 hp (1,300 kW)
Tractive effort62,250 lbf (276.9 kN)
Career
LocaleNorth America

Santa Fe's aging fleet of F7 units were approaching retirement age in 1970. These units were remanufactured into switchers and named CF7. Santa Fe used them for a decade and sold many of them to short lines around the states. Many of those were still being used as of 2003.[2]

See also

References
  1. Glischinski, Steve. (1997). "p121". Santa Fe Railway. Osceola, WI, USA: Motorbooks International. p. 121. ISBN 0-7603-0380-0. OCLC 37567382.
  2. Solomon, Brian (2003). Santa Fe Railway. Voyageur Press. p. 48. ISBN 1610606728.
  3. Solomon, Brian. (2012). "p228". North American Locomotives : a Railroad-by-Railroad Photohistory. Laguna Hills: Quayside Publishing Group. p. 228. ISBN 978-1-61058-685-6. OCLC 1027156389.
  4. "Equipment". Kentucky Railway Museum. Retrieved 2020-03-27.
  5. "Equipment". Oklahoma Railway Museum. Retrieved 2020-03-29.
  • "Atchison, Topeka and Santa Fe CF7". QStation. Retrieved December 6, 2005. Includes background and modeling information, equipment rosters, and a photo gallery.
  • "CF7: The Ugly Duckling?". Locomotive Rebuilding Programs. Archived from the original on December 17, 2005. Retrieved December 6, 2005.
  • "The History of EMD Diesel Engines". Pacific Southwest Railway Museum. Archived from the original on January 13, 2006. Retrieved December 14, 2005.
  • Duke, Donald (1997). Santa Fe: The Railroad Gateway to the American West, Volume Two. San Marino, CA: Golden West Books. ISBN 0-87095-110-6.
  • Middleton, Keel (2005). "Wheat Harvest on the Plains Division". The Warbonnet. 12 (4): 6–23.
  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, WI: Kalmbach Publishing Co. ISBN 0-89024-026-4.

Further reading
  • Poole, Cary F. (1997). CF7 Locomotives: From Cleburne to Everywhere. The Railroad Press, Hanover, PA. ISBN 0-9657709-0-7.


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