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Specifications
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Trucks	Blomberg B
Wheel diameter	40 in (1,016 mm)
Minimum curve	23° (250.79 ft or 76.44 m radius)
Wheelbase	43 ft (13.11 m)
Length	55 ft 2+1⁄4 in (16.82 m)
Width	10 ft 8 in (3.25 m)
Height	15 ft (4.57 m)
Loco weight	260,000 lb (120,000 kg)
Fuel capacity	1,200 US gal (4,500 L; 1,000 imp gal)
Prime mover	EMD 16-567B
RPM range	800
Engine type	Two-stroke V16 diesel
Aspiration	Roots-type supercharger
Generator	EMD D-12
Traction motors	(4) EMD D-27-B
Cylinders	16
Cylinder size	8+1⁄2 in × 10 in (216 mm × 254 mm)

Type and origin
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division (EMD); General Motors Diesel (GMD, Canada)
Model	FP7
Build date	June 1949 – December 1953
Total produced	381

EMD FP7
EMD FP7
	Western Pacific 805-A, an EMD FP7, pulls the California Zephyr in March 1970
Power type
Type and origin
Power type	Diesel-electric
Builder	General Motors Electro-Motive Division (EMD); General Motors Diesel (GMD, Canada)
Model	FP7
Build date	June 1949 – December 1953
Total produced	381
Configuration:;
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Trucks	Blomberg B
Wheel diameter	40 in (1,016 mm)
Minimum curve	23° (250.79 ft or 76.44 m radius)
Wheelbase	43 ft (13.11 m)
Length	55 ft 2+1⁄4 in (16.82 m)
Width	10 ft 8 in (3.25 m)
Height	15 ft (4.57 m)
Loco weight	260,000 lb (120,000 kg)
Fuel capacity	1,200 US gal (4,500 L; 1,000 imp gal)
Prime mover	EMD 16-567B
RPM range	800
Engine type	Two-stroke V16 diesel
Aspiration	Roots-type supercharger
Generator	EMD D-12
Traction motors	(4) EMD D-27-B
Cylinders	16
Cylinder size	8+1⁄2 in × 10 in (216 mm × 254 mm)
Maximum speed
Performance figures
Maximum speed	100–119 mph (161–192 km/h)
Power output	1,500 horsepower (1,100 kW)
Locale
Career
Locale	North America, Saudi Arabia

The EMD FP7 is a 1,500 horsepower (1,100 kW), B-B dual-service passenger and freight-hauling diesel locomotive produced between June 1949 and December 1953 by General Motors' Electro-Motive Division and General Motors Diesel. Final assembly was at GM-EMD's La Grange, Illinois plant, excepting locomotives destined for Canada, in which case final assembly was at GMD's plant in London, Ontario. The FP7 was essentially EMD's F7A locomotive extended by four feet to give greater water capacity for the steam generator for heating passenger trains.

Design

While EMD's E-units were successful passenger engines, their A1A-A1A wheel arrangement made them less useful in mountainous terrain.^{[citation needed]} Several railroads had tried EMD's F3 in passenger service, but there was insufficient water capacity in an A-unit fitted with dynamic brakes. The Atchison, Topeka and Santa Fe Railway's solution was to replace the steam generators in A-units with a water tank, and so only fitted steam generators into the B-units. The Northern Pacific Railway's solution was to fit extra water tanks into the first baggage car, and to pipe the water to the engines. EMD's solution to the problem was to add the stretched FP7 to its catalog increasing the water storage capacity.

A total of 381 cab-equipped lead A units were built; unlike the freight series, no cabless booster B units were sold. Regular F7B units were sometimes used with FP7 A units, since they, lacking cabs, had more room for water and steam generators. The FP7 and its successor, the FP9, were offshoots of GM-EMD's highly successful F-unit series of cab unit freight diesel locomotives.

F3s, F7s, and F9s equipped for passenger service are not FP-series locomotives, which, although similar in appearance, have distinctive differences. This includes, but not limited to, the greater body length. The extra 4 ft (1.2 m) of length was added behind the first body-side porthole, and can be recognised by the greater distance between that porthole and the first small carbody filter grille. The corresponding space beneath the body, behind the front truck, was also opened up; this either remained an empty space or was filled with a distinctive water tank shaped like a barrel mounted transversely.^[1]

Over their production run, there were numerous detail changes including the style of side grills (notably on Canadian-built units), carbody louvres, and dynamic brake fan sizing (36 in [0.91 m] initially, 48 in [1.2 m] on later production units). Some railroads such as Southern Pacific and Canadian Pacific outfitted their units with rooftop-mounted icicle breakers for protecting dome car windows in mountain territory where icicles formed around the roofs of tunnels.

Original buyers

Locomotives built by EMD at La Grange, Illinois

Railroad	Quantity FP7	Quantity F7B (where bought with FP7)	Road numbers FP7	Road numbers F7B	Notes
Electro-Motive Division (demonstrator)	1	2	7001	7002–7003	To Soo Line (Wisconsin Central) 2500A, 2500B, 2501B
Electro-Motive Division (demonstrator)	1	2	9051	9052–9053	To Soo Line 500A, 500B, 501B
Arabian American Oil Company (Aramco; Saudi Arabia)	2	—	1006–1007	—	Built with 567C engines; later handed over to Saudi Government Railways
Atlanta and West Point Rail Road	4	—	551–554	—
Atlantic Coast Line	44	—	850–893	—
Alaska Railroad	3	1	1510–1514 (even)	1507	1510-1514 built with 567BC engines
Chicago and Eastern Illinois Railroad	11	—	1600–1609, 1609 2nd	—	1609 1st destroyed at Mode, IL 6/28/1951 and rebuilt on a new frame with same road number and serial number
Chesapeake and Ohio Railway	16	7	8000–8015	8500–8506
Chicago Great Western Railway	3	5	116-A, -C, 116-C 2nd	116-B,D,E,F,G	116-C 1st destroyed at North Hanover, IL 6/2/1951 and rebuilt on a new frame with same road number and serial number
Chicago, Rock Island and Pacific Railroad	10	—	402–411	—
Clinchfield Railroad	1	—	200	—	Repainted into Family Lines livery, then to Seaboard System and renumbered to 118, then to CSX
Ferrocarriles Nacionales de México	17	7	6300–6309, 6328A–6334A	6328B–6334B
Ferrocarril Sonora–Baja California	2	—	23035–23036	—
Florida East Coast Railway	5	—	571–575	—
Georgia Railroad	3	—	1002–1004
Louisville and Nashville Railroad	45		600–634, 663–672
Milwaukee Road	32	16	90A,C–105A,C	90B–105B	90–94 renumbered 60–64 for freight service; 93A (63A) and 104A sold to GO Transit 96A sold to Escanaba & Lake Superior Railroad re-entered service 2020
Missouri–Kansas–Texas Railroad	8	4	121A,C–124A,C	121B–124B
Northern Pacific Railway	2	—	6600–6601	—
Pennsylvania Railroad	40	14	9832A–9871A	9832B–9858B (even)	A units renumbered 4332-4371 and B units 4150-4163 by PRR for Penn Central; 18 scattered A units 4332–4370 to Conrail
Reading Company	8	—	900–907	—	900, 902, 903 to SEPTA, renumbered 4371-4373
Richmond, Fredericksburg and Potomac Railroad	3	—	1201–1203	—
St. Louis–San Francisco Railway	12	—	5040–5051	—
Soo Line	5	2	501A–503A, 504–505	502B–503B
Soo Line (Wisconsin Central Railway)	1	–	2501A	—
Southern Railway (Cincinnati, New Orleans and Texas Pacific Railway)	20		6130–6149
Southern Pacific Company	16		6446–6461		6446–6451; 6453–6459; 6461 to Amtrak 110-123
St. Louis Southwestern Railway ("Cotton Belt")	1	—	330	—	Renumbered to 306 then leased to Southern Pacific as SP 6462^[2]^[3]
Union Pacific Railroad	2	2	911-912	910B, 910C	Renumbered to 1498 - 1499
Western Railway of Alabama	2	–	502–503	—
Western Pacific Railroad	4	2	804A,C–805A,C	804B–805B
Totals	324	64

Locomotives built by GMD at London, Ontario

Railroad	Quantity FP7	Quantity F7B (were bought with FP7)	Road numbers FP7	Road numbers F7B	Notes
Canadian Pacific Railway	35	29	4028–4041, 4058–4063, 4066–4075, 4099–4103	4424–4448, 4459–4462	Some renumbered as 1400- and 1900- series passenger units, some later resold to Via Rail in 1978.
Ontario Northland Railway	22	—	1500–1521	—	1500, 1503–1505, 1507, 1511-1514 converted into HEP control cars for GO Transit
Totals	57	29

Preserved examples

Reading 902 at Steamtown National Historic Site

Alaska Railroad 1510 and 1512, used by the Verde Canyon Railroad in Clarkdale, Arizona, on its excursion train.
Chicago Great Western Railway 116-A, on display, at Hub City Heritage Railroad Museum,^[4] Oelwein, Iowa.
Canadian Pacific Railway 4038, at Minnedosa, MB.
Canadian Pacific Railway 4069, in working condition and in use at the West Coast Railway Heritage Park; see West Coast Railway Association.
Canadian Pacific Railway 4071, renumbered as Western Maryland Railway 243, in working condition and in use at the Durbin and Greenbrier Valley Railroad.
Canadian Pacific Railway 4099 was later renumbered 1400. After a stint with Via Rail and Nebkota, it was reacquired by CP and given the number 1400 again. It was retired again in 2007 and is preserved on static display at the company's Ogden headquarters, as CP 1400.
Clinchfield Railroad 200, renumbered as Western Maryland Railway 67, in working condition and in use at the Durbin and Greenbrier Valley Railroad. It was previously used on the Potomac Eagle Scenic Railroad.
Milwaukee Road 96C, in Monon livery, inoperable at the former Indiana Transportation Museum in Noblesville, Indiana.
Milwaukee Road 101A, on static display (was non-operational when acquired but reportedly restored by volunteers to operable condition^[5]) in Cresco, Iowa.
Milwaukee Road 104C, at the Illinois Railway Museum, Union, Illinois.
Reading 900, at the Reading Railroad Heritage Museum in Hamburg, Pennsylvania
Reading 902 and 903, now at SMS Rail Lines, pending restoration.
Soo Line 500A (né EMD demonstrator #9051), on display at Ladysmith, Wisconsin.
Soo Line 2500A (né EMD demonstrator #7001), restored to working condition, at Lake Superior Railroad Museum, Duluth, Minnesota.
Southern Railway (CNO&TP) 6133, in working condition at the North Carolina Transportation Museum at Spencer, North Carolina.
Southern Railway (CNO&TP) 6143 and 6147, in working condition and in use at the Stone Mountain Park at Atlanta.
Southern Railway (CNO&TP) 6141 and 6138 as RJ Corman 1940 and 1941 in use by the Kentucky Dinner Train operation out of Bardstown, Kentucky.
Western Pacific 805-A, a locomotive used on the famous California Zephyr, is preserved in operable condition at the Western Pacific Railroad Museum at Portola, California.

References

Notes

^ Foster, Gerald L. (1996). A field guide to trains of North America. Boston: Houghton Mifflin. p. 98. ISBN 0-395-70112-0.
^ "SP EMD FP-7 #6462". wx4.org. Retrieved 2025-01-03.
^ Strapac, Joseph A. (1999). Cotton Belt Locomotives. Indiana University Press. pp. 158–159. ISBN 978-0-253-33601-9.
^ "Home". Hub City Heritage Corporation Railway Museum.
^ "Beadle Park – Cresco, Iowa". Iowa Beautiful. Archived from the original on December 2, 2005.

Bibliography

Dorin, Patrick C. (1972). Chicago and North Western Power. Burbank, California: Superior Publishing. pp. 123–127. ISBN 0-87564-715-4.
Lamb, J. Parker (2007). Evolution of the American Diesel Locomotive. Railroads Past and Present. Bloomington, Indiana: Indiana University Press. ISBN 978-0-253-34863-0.
Marre, Louis A. (1995). Diesel Locomotives: The First 50 Years: A Guide to Diesels Built Before 1972. Railroad Reference Series. Waukesha, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-258-2.
Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
Schafer, Mike (1998). Vintage Diesel Locomotives. Enthusiast Color Series. Osceola, Wisconsin: MBI Publishing. ISBN 978-0-7603-0507-2.
Solomon, Brian (2000). The American Diesel Locomotive. Osceola, Wisconsin: MBI Publishing Company. ISBN 978-0-7603-0666-6.
Solomon, Brian (2005). EMD F-Unit Locomotives. North Branch, Minnesota: Specialty Press. ISBN 978-1-58007-192-5.
Solomon, Brian (2006). EMD Locomotives. St. Paul, Minnesota: Voyageur Press. ISBN 978-0-7603-2396-0.
Solomon, Brian (2010). Vintage Diesel Power. Minneapolis, Minnesota: MBI Publishing. ISBN 978-0-7603-3795-0.
Solomon, Brian (2011). Electro-Motive E-Units and F-Units: The Illustrated History of North America's Favorite Locomotives. Minneapolis, Minnesota: Voyageur Press. ISBN 978-0-7603-4007-3.
Solomon, Brian (2012). North American Locomotives: A Railroad-by-Railroad Photohistory. Minneapolis, Minnesota: Voyageur Press. ISBN 978-0-7603-4370-8.
Wilson, Jeff (1999). F Units: The Diesels That Did It. Golden Years of Railroading. Waukesha, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-374-9.
EMD Product Reference Data Card dated January 1, 1959 has the 567BC and 567C engine data used in the as-built roster.

External links

[1] Foster, Gerald L. (1996). A field guide to trains of North America. Boston: Houghton Mifflin. p. 98. ISBN 0-395-70112-0.

[2] "SP EMD FP-7 #6462". wx4.org. Retrieved 2025-01-03.

[3] Strapac, Joseph A. (1999). Cotton Belt Locomotives. Indiana University Press. pp. 158–159. ISBN 978-0-253-33601-9.

[4] "Home". Hub City Heritage Corporation Railway Museum.

[5] "Beadle Park – Cresco, Iowa". Iowa Beautiful. Archived from the original on December 2, 2005.

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PROFILPELAJAR.COM

EMD FP7

Design

Original buyers

Locomotives built by EMD at La Grange, Illinois

Locomotives built by GMD at London, Ontario

Preserved examples

See also

References

Notes

Bibliography

External links

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