The FM H-15-44 was a road-switcher manufactured by Fairbanks-Morse from September 1947 to June 1950. The locomotive was powered by a 1,500-horsepower (1,100 kW), eight-cylinder opposed piston engine as its prime mover, and was configured in a B-B wheel arrangement mounted atop a pair of two-axle AAR Type-B road trucks with all axles powered. The H-15-44 featured an offset cab design that provided space for an optional steam generator in the short hood, making the model versatile enough to work in passenger service as well as freight duty.
Raymond Loewy heavily influenced the look of the unit, which emphasized sloping lines and accented such features as the radiator shutters and headlight mounting, as is found on CNJR #1501 and KCS #40. The cab-side window assembly incorporated "half moon"-shaped inoperable panes which resulted in an overall oblong shape. The platform (underframe) was shared with F-M's 2,000-horsepower (1,500 kW) end cab road switcher, the FM H-20-44, as was the carbody to some extent. The platform and carbody was also utilized by the H-15-44's successor, the FM H-16-44.
Only 35 units were built for American railroads and none exist today.
|Fairbanks-Morse (demonstrators)||to Central Railroad of New Jersey 1500|
|Up-rated to 1,600 hp (1,200 kW) and sold Long Island Rail Road #1503|
|Akron, Canton and Youngstown Railroad|
|Central of Georgia Railway|
|Central Railroad of New Jersey|
|Chicago, Indianapolis and Louisville Railway (“Monon”)||Renumbered 45–46|
|Chicago, Rock Island and Pacific Railroad||Re-engined by Electro-Motive Division|
|Denver and Rio Grande Western Railroad|
|Kansas City Southern Railway ("Louisiana and Arkansas Railway")|
|Union Pacific||Fitted with steam generator; DS prefix dropped in 1955|
- "Fairbanks-Morse 38D8 Diesel Engine". PSRM Diesel Locomotives. Archived from the original on May 26, 2006. Retrieved January 1, 2006.
- Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
- Kirkland, John F. (November 1985). The Diesel Builders Volume 1: Fairbanks-Morse and Lima-Hamilton. Interurban Press. ISBN 0-916374-69-6.
- Sweetland, David R. (2004). H15-44 and H16-44: Fairbank-Morse's Distinctive Road Switchers. Withers Publishing, Halifax, PA. ISBN 1-881411-41-9.