FM H-12-44

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**FM H-12-44**
Power type	Diesel-electric
Chicago, Milwaukee, St. Paul and Pacific Railroad #718, an FM H-12-44 yard switcher. The prominent rear roof visor, among its other external features, clearly identifies the unit as having been manufactured prior to September of 1952.
Builder	Fairbanks-Morse
Model	H-12-44
Build date	May 1950 — March 1961
Total production	334
AAR wheel arr.	B-B
Gauge	1,435 mm (4 ft 8½ in)
Length	48 ft 10 in (14.88 m)
Total weight	240,000 lb (109,000 kg)
Prime mover	FM 38D-6
Engine type	2-stroke diesel
Aspiration	Roots blower
Displacement	3,108 in³ (50.9 L)
Cylinders	6 (Opposed piston)
Cylinder size	8.125 in × 10 in (206 mm × 254 mm)
Transmission	DC generator, DC traction motors
Top speed	60 mph (97 km/h)
Power output	1,200 hp (895 kW)
Tractive effort	40,440 lbf (180 kN)
Locomotive brakes	Straight air
Train brakes	Air
Locale	North America

The FM H-12-44 was a yard switcher produced by Fairbanks-Morse from May, 1950–March, 1961. The units featured a 1,200 hp, six-cylinder opposed piston engine prime mover, and were configured in a B-B wheel arrangement mounted atop a pair of two-axle AAR Type-A switcher trucks, with all axles powered and geared for a top speed of 60 miles-per-hour.

303 were built for American railroads, 30 were manufactured from August, 1951–June, 1956 by the Canadian Locomotive Company for use in Canada, and 1 unit was exported to Mexico. Initially, H-12-44s were visually indistinguishable from their predecessor model, the FM H-10-44. However, beginning in September, 1952 the Raymond Loewy design elements were removed as a cost-saving measure: cab lines were squared-off, the slanted-nose styling was discontinued, and the roof visor was eliminated. The following year, the fairing over the battery box was removed and louvers added to reduce the possibility of battery explosions. None of the units was produced between May and October of 1956, after which time the carbodies were shortened by some three feet and outfitted with a deeper side skirt.

Sixteen intact examples of the H-12-44 are known to survive today, all of which are owned by railroad museums or historical societies.

A print advertisement from Railway Age for FM's Model H12-44 locomotives, featuring AT&SF #546.

1 Units produced by Fairbanks-Morse (1950–1961)
2 Units produced by the Canadian Locomotive Company (1951–1956)
3 Preservation
4 References
5 See also
6 External links

[edit] Units produced by Fairbanks-Morse (1950–1961)

Railroad	Quantity	Road numbers
Atchison, Topeka and Santa Fe Railway	59	503–540, 544–564
Ayrshire Collieries Corporation	1	1
Baltimore and Ohio Railroad	17	196–197, 310–319, 9722–9726
Central of Georgia Railroad	4	315–318
Chicago, Milwaukee, St. Paul and Pacific Railroad	48	1826–1847, 2309–2325
Chicago and North Western Railway	9	1071, 1072, 1110–1116
Chihuahua al Pacífico	1	70
Columbia and Cowlitz Railway	1	D-2 (later reassigned road #700)
Fairbanks-Morse (demonstrator unit)	1	76 (sold to Yankeetown Dock Corp. and assigned road #1)
Indianapolis Union Railway	3	19–21
Kentucky and Indiana Terminal Railroad	7	60–66
Minnesota Western Railroad	1	10
New York Central Railroad	27	9111–9137
New York, Chicago and St. Louis Railroad	22	134–155
Pennsylvania Railroad	16	8708–8723
Sandersville Railroad	1	100
St. Louis-San Francisco Railway	4	282–285
Soo Line Railroad	5	315–319
Southern Pacific Railroad	45	1486–1491, 1529–1538, 1568–1596
Tennessee Valley Authority	1	22
United States Army	20	1843–1862
U.S. Steel	8	GE9–GE16
Wabash Railroad	3	384–386
White River Terminal (Weyerhaeuser Timber Company)	1	WTC 1
Yankeetown Dock Corporation	2	1, 2

[edit] Units produced by the Canadian Locomotive Company (1951–1956)

Railroad	Quantity	Road numbers
Canadian National Railway	30	1630–1659

[edit] Preservation

Several examples of the H-12-44 model have been preserved around the US and Canada.

Former U. S. Army 1857 is preserved at the Western Pacific Railroad Museum at Portola, CA. It was used at the Sierra Army Depot at Herlong, CA, located along the former Western Pacific Railroad.

[edit] References

Fairbanks-Morse 38D8 Diesel Engine. PSRM Diesel Locomotives. Retrieved on January 1, 2006.
Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, WI: Kalmbach Publishing Co.. ISBN 0-89024-026-4.

[edit] See also

List of Fairbanks-Morse locomotives

[edit] External links

v • d • e Diesel locomotives built by Fairbanks-Morse
Cab units	Erie-built, OP800, P-12-42
C-liners	CFA-16-4, CFA-20-4, CFA-24-5, CPA-16-4, CPA-16-5, CPA-20-5, CPA-24-5
Switchers	H-10-44, H-12-44, H-12-44TS, H-15-44, H-16-44, H-20-44
Train Masters	H-16-66, H-24-66

v • d • e Diesel locomotives built by the Canadian Locomotive Company
Baldwin designs	DRS-4-4-10
Fairbanks-Morse designs	H-12-44, H-12-46, H-16-44, H-24-66, CFA-16-4, CFB-16-4, CPA-16-4, CPB-16-4, CPA-16-5, CPB-16-5