Locomotives / Train Sets


Diesel Locomotive

Series: "F-Unit"

Entry Last Edited: 01/17/2024 | Content ©www.RailRoadJunction.net | The following text is exclusive to this site.
Specifications [+]
The F3 series improved on hauling power over the F2 and proved popular along both passenger and freight line routes for its time.
The EMD (Electro-Motive Division, General Motors) F3 was an immediate post-World War 2 diesel-fueled locomotive capable of serving both passenger and freight line service routes. Production totaled 1,807 units. The F3 succeeded the F2 (appearing 1946, 104 total units produced) and offered improved hauling capability. 1,807 in all were completed by EMD with manufacturing running from mid-1945 to early-1949.

The 1,807 total was comprised of 1,111 standard design forms, noted as "A units", and 696 cabless booster forms classified as "B units".

In the AAR notation, the wheel arrangement was B-B indicating a pair of (Blomberg B series) trucks with powered axles. Similar to the F2 before it, the newer design carried a sleek appearance with the driving cab set aft of a smoothly-contoured bow assembly with centered circular lights. Access to the cab was via hinged rectangular doors found along either side of the vehicle. The engine took up most of the length of the locomotive and was set behind the driving cab.

The locomotive measured 50.7 feet long with a beam of 10.7 feet and a height of 15 feet. Power was from an EMD 567B 2-stroke V16 diesel-fueled series prime mover outputting 1,500 horsepower. EMD also supplied its D-12 as the system generator. Four traction motors were in play (either EMD D-17-B or D27-B). All told, the locomotive could hit speeds of 103 miles-per-hour (166kmh). Tractive effort was 55,000lb.

The F3 was operated by a myriad of customers in the United States with Union Pacific Railroad leading the way at 89 A units (this alongside 90 B units as well). They were followed by Pennsylvania Railroad and Southern Pacific Railroad who each operated 80 A units (40 and 80 B units, respectively). Southern Railway has a fleet of 79 of the A type backed by 65 of the B type.

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Specifications [ EMD F3 ]

Electro-Motive Division (EMD) General Motors - USA

United States
1945 - 1949
Production Run

1,807 units
Production Total
Train driver seating position graphic

Driver Position
15.4m | 50.7 ft
NOTE: May include length of entire train set
234,000 kg
(515,970 lb | 258 US Tons)
Locomotive power source graphical icon
Power Source
EMD 567B 2-stroke V16 diesel-fueled engine developing 1,500 horsepower at 275 to 800rpm; EMD D-12 generator.
Engine / Drive Source
4 x EMD D-17B or D-27-B.
Traction Motor / Sets
1,500 hp
Rated Output Power
166.0 kph
(103.2 mph)
Max Speed
Wheel Arrangement
(Loco Facing Left)

Series Variants
F3 - Base Series Designation.
Operating Countries
Canada; United States

National flag of Canada National flag of the United States
Customers / Operators:
Aberdeen and Rockfish Railroad; Atchison, Topeka and Santa Fe Railway; Atlanta and St Andrews Bay Railway; Atlantic Coast Line Railroad; Baltimore and Ohio Railroad; Bangor and Aroostook Railroad; Boston and Maine Railroad; Canadian National Railway; Central of Georgia Railway; Central Railroad of New Jersey; Chicago and Eastern Illinois Railroad; Chicago and North Western Railway; Chicago Great Western Railway; Chicago, Burlington and Quincy Railroad; Chicago, Indianapolis and Louisville Railway; Chicago, Milwaukee, St Paul and Pacific Railroad; Clinchfield Railroad; Delaware, Lackawanna and Western Railroad; Denver and Rio Grande Western Railroad; Electro-Motive Division; Erie Railroad; Florida East Coast Railway; Georgia Railroad; Grand Trunk Western Railroad; Great Northern Railway; Gulf, Mobile and Ohio Railroad; Kansas City Southern Railway; Lehigh Valley Railroad; Louisville and Nashville Railroad; Maine Central Railroad; Minneapolis and St Louis Railway; Missouri Pacific Railroad; Missouri-Kansas-Texas Railroad; Nashville, Chattanooga and St Louis Railway; New York Central Railroad; New York, Ontario and Western Railway; Northern Pacific Railway; Pennsylvania Railroad; Reading Company; Seaboard Air Line Railroad; Soo Line; Southern Pacific Company; Southern Railway; Spokane, Portland and Seattle Railway; St Louis-San Francisco Railway; Union Pacific Railroad; Western Maryland Railway; Western Pacific Railroad; Western Railway of Alabama
NOTE: Includes both past and present

Image of the EMD F3

Image of the EMD F3
Port side view of EMD F3 diesel locomotive in Chicago and Eastern Illinois livery.
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