which powers the traction motors that drive the axles and turn the
locomotive's wheels.
Three representative diesel-electric locomotives that the Army
owns and operates are described briefly in subparagraphs a through c.
The classification 0-6-6-0, etc., is explained in paragraph 1.3.
a. The 0-6-6-0, 120-ton road switcher locomotive, shown in
figure 1.1, is designed for use in heavy-duty road and yard service.
It may be used in single or multiple units on standard and broad gage
railways,
This
120-ton,
1600-horsepower
locomotive
is
highly
versatile, suitable for operation under extremes of climate, and
adaptable for both foreign and domestic coupling arrangements. This
locomotive is often referred to as MRS-l--the MRS stands for military
road switcher.
Figure 1.1.
Diesel-Electric Locomotive, Road Switcher, 0-6-6-0.
b. The 0-4-4-0, 100-ton, SW-8 locomotive, shown in figure 1.2,
is designed for heavy-duty road and switching service on standard-
gage railroads both in the continental United States and foreign
countries.
It has an 800-horsepower engine and has multiple-unit
capability.
c. The 0-4-4-0, 60-ton locomotive, shown in figure 1.3, can
be used for both road and switching service.
It may be used in
single or multiple units on broad gage railroads.
This locomotive
has a 500-horsepower diesel engine and can be used on both
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