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FM H-20-44
Diesel-electric locomotive / From Wikipedia, the free encyclopedia
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The FM H-20-44 was a diesel locomotive manufactured by Fairbanks-Morse from June 1947 – March 1954. It represented the company's first foray into the road switcher market. The 2,000 hp (1,490 kW), ten-cylinder opposed piston engine locomotive was referred to by F-M's engineering department as the "Heavy Duty" unit. It was configured in a B-B wheel arrangement mounted atop a pair of two-axle AAR Type-B road trucks with all axles powered. H-20-44s shared the same platform and much of the same carbody as the lighter-duty FM H-15-44, which began its production run three months later.
![]() | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (February 2015) |
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![]() An FM H-20-44 locomotive, retired Union Pacific #1366 | |||||||||||||||||||||||||||||||||
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Galveston_Railroad_Museum_March_2022_15_%28Union_Pacific_Railroad_FM_H-20-44_No._410%29.jpg/640px-Galveston_Railroad_Museum_March_2022_15_%28Union_Pacific_Railroad_FM_H-20-44_No._410%29.jpg)
In the same manner as other F-M switcher models, the H-20-44 started out displaying a variety of Raymond Loewy-inspired contours, only to have the majority of these superfluous trim features stripped from the last few units built as a cost-cutting measure. Only 96 units were built for American railroads, as few firms saw sufficient value in moving freight in greater quantities or at a higher speeds than was possible with the typical 1,500 and 1,600 horsepower (1,200 kW) four-axle road switchers of the era. Also limiting the model's utility as a true road unit was its lack of a short hood, which the (ironically) lighter-duty H-15-44 did have. Three intact examples of the H-20-44 are known to survive today; all are preserved at railroad museums. These were former Southwest Portland Cement units donated in the early 1980s.
A six axle version for better traction was catalogued, but no orders were placed, and no demos were built.