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EMD/GMD "FP9" Locomotives

Published: August 1, 2023

By: Adam Burns

The FP9 was the passenger variant of Electro-Motive's final traditional F series model, the F9.  With interest waning for streamlined diesels by the mid-1950s, and rail travel in decline, no U.S. railroad elected to purchase the FP9 (although Chicago & North Western did have former FTA's #5400A, 5400D - 5401A, 5401D rebuilt into FP9s in 1955).

However, both major Canadian lines, Canadian Pacific and Canadian National, purchased the model, as did Ferrocarril Nacional de México (Mexico) and the Saudi Arabian government.  

As Brian Solomon notes in his book, "Electro-Motive: E Units and F Units," as part of the F9 line, the FP9 was the most reliable, rugged, and powerful, in the F series.

Interestingly, after wrapping up their careers in Canada a number of units found their way to the United States leading business trains at places like Kansas City Southern, Pan Am Railways, and Ohio Central.  Despite fewer than 100 examples produced during a five year production run, a number of FP9s remain preserved throughout North America.

Photos

Overview

The F9 marked the pinnacle of Electro-Motive's traditional F series.   Unfortunately, by the time it was introduced in 1953 interest in streamlined freight locomotives had largely passed.

While the F7 proved incredibly successful with nearly 4,000 examples sold -making it EMD's best-selling model up until that time - railroads soon discovered there was little monetary gain from operating freight trains with streamlined locomotives. 

The GP7, of late 1949, was designed for general freight service, and proved a much more efficient platform in this regard.  It offered crews excellent visibility and could be utilized in all types of applications; road service, branch line duties, or even switching assignment.  It sold more than 2,700 examples by 1954.  The following GP9 saw even higher sales.

The F9 was part of EMD's so-called "9 Line" which included the F9, GP9, and E9 all of which entered the builder's catalog in 1953/1954.  

The F9's most notable improvement was its use of EMD's latest 567 power plant, the 567C. This engine, as Mr. Solomon notes, was the most advanced in the series.

Its upgrades included a redesign of the engine crankcase to withstand a greater beating in daily service, replacement of water seals susceptible to leaking on older model 567s, and an improved cooling circuit.

As a specialized design the FP9 was principally intended for passenger service.   When EMD first introduced its four-axle F series in 1939, the models included an optional steam generator. 

A number of railroads soon discovered their B-B trucks performed much better in mountainous territory than EMD's "E" series passenger models. The Santa Fe, for example, equipped most of its transcontinental runs, like the Super Chief and El Capitan, with F3s and F7s. 

As a result, EMD cataloged the FP7, a variant of the F7, featuring a stretched frame that could sufficiently house a steam generator and the necessary water supply.   The model enjoyed modest sales of more than 400 units; such demand warranted EMD to continue the series with the FP9.

Data Sheet and Specifications

Production Roster

Total Built = 90

Electro-Motive

General Motors Diesel

Export

The model was otherwise identical to an F9.  It was equipped with EMD's latest prime mover (567C), traction motor (D37), and other internal improvements.  

These upgrades made the F9 line the most reliable, powerful, and rugged in the series.  There was no cabless booster offered in the FP9 (the FP7 was likewise cataloged without boosters).

Unfortunately, most U.S. railroads had moved on from streamlined diesels by the mid-1950s and no American lines purchased new FP9s. 

However, as previously mentioned, the C&NW had four former FTs rebuilt into FP9s and the model did find interest in Canada, Mexico, and Saudi Arabia.  Ultimately, only 90 units were sold.  

Spotting Features

In the FP7, the easiest distinguishing feature from a standard F7 was an increased length between the first porthole and the first louver.  Unfortunately, this detail is missing in the FP9 as the porthole has been moved further back.

As Louis Marre notes in his book, "Diesel Locomotives: The First 50 Years," the most reliable means of identifying an FP9 includes the extra space between the front truck and fuel tank as well as the additional roof hatch.

Sources

• Foster, Gerald. A Field Guide To Trains. New York: Houghton Mifflin, 1996.

• Hayden, Bob. Diesel Locomotives: Cyclopedia, Volume 2 (Model Railroader). Milwaukee: Kalmbach Publishing Company, 1980.

• Marre, Louis A. Diesel Locomotives: The First 50 Years, A Guide To Diesels Built Before 1972.  Milwaukee: Kalmbach Publishing Company, 1995.

• Pinkepank, Jerry A. Diesel Spotter's Guide.  Milwaukee: Kalmbach Publishing Company, 1967.

• Solomon, Brian.  EMD Locomotives.  Minneapolis: MBI Publishing Company, 2006.

• Solomon, Brian.  Electro-Motive E-Units and F-Units: The Illustrated History of North America's Favorite Locomotives.  Minneapolis:  Voyageur Press, 2011.