FM H-12-44

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FM H-12-44
FM H-12-44
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.
Power type Diesel-electric
BuilderFairbanks-Morse
ModelH-12-44
Build dateMay 1950 —
March 1961
Total production334
AAR wheel arr.B-B
Gauge1,435 mm (4 ft 8½ in)
Length48 ft 10 in (14.88 m)
Total weight240,000 lb (109,000 kg)
Prime moverFM 38D-6
Engine type2-stroke diesel
AspirationRoots blower
Displacement3,108 in³ (50.9 L)
Cylinders6 (Opposed piston)
Cylinder size8.125 in × 10 in
(206 mm × 254 mm)
TransmissionDC generator,
DC traction motors
Top speed60  mph (97 km/h)
Power output1,200 hp (895 kW)
Tractive effort40,440 lbf (180 kN)
Locomotive brakesStraight air
Train brakesAir
LocaleNorth 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.


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

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

Railroad   Quantity   Road numbers
Canadian National Railway
30
1630–1659

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.

References

See also

External links


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


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