EMD F-unit railroad locomotive converted for switching duty
Santa Fe CF7
Locomotive #517, a CF7, is the main power on the Commonwealth Railway in Suffolk, Virginia.
Type and origin
Power type
Diesel-electric
Builder
General Motors Electro-Motive Division (EMD); rebuilt by Atchison, Topeka & Santa Fe Railway, Cleburne, Texas shops
Model
CF7
Rebuild date
February 1969/1970 – 1978
Number rebuilt
233
Specifications
Configuration:
• AAR
B-B
Gauge
4 ft 8+1⁄2 in (1,435 mm)
Length
48 ft 6 in (14.78 m)
Loco weight
249,000 pounds (113 t)
Prime mover
EMD 16-567BC
Engine type
2-stroke diesel
Aspiration
Roots blower
Displacement
9,072 cu in (148.7 liters)
Cylinders
V16
Cylinder size
8.5 in × 10 in (216 mm × 254 mm)
Transmission
DC generator, DC traction motors
Loco brake
Straight air
Train brakes
26 L air on later units, 24RL on earlier units
Performance figures
Maximum speed
65 mph (105 km/h)
Power output
1,750 hp (1,300 kW)
Tractive effort
62,250 lbf (276.9 kN)
Career
Locale
North America
The Santa Fe 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 & Santa Fe Railway's Cleburne, Texas, workshops between February 1970 and 1978.[1][2] This was Santa Fe's most notable remanufacturing project, with 233 completed between 1970 - March 1978.[3] 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.
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.[4]
^Is rebuilding the answer? Railway Age June 8, 1970 pages 29/30
^Glischinski, Steve. (1997). "p121". Santa Fe Railway. Osceola, WI, USA: Motorbooks International. p. 121. ISBN 0-7603-0380-0. OCLC 37567382.
^Santa Fe's born-again road-switchers Railway Age September 14, 1981 pages 40-44, 106
^Solomon, Brian (2003). Santa Fe Railway. Voyageur Press. p. 48. ISBN 1610606728.
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