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 TM 55-1905-221-14-1
SECTION III. TECHNICAL PRINCIPLES OF OPERATION
1-11. GENERAL.
This section contains the technical principles of operation of the many systems contained in the landing craft. The
following paragraphs describe the systems and the many components that function as an integral part of an overall
system.
1-12.
ENGINES.
a. Description. Model 12005A and Model 12006A twin units each consist of two six-cylinder diesel engines in a side-
by-side arrangement coupled to a transfer gear and mounted on a steel base.
b. Arrangement. Model 12005A is built for starboard installation. The two engines of this model are right-hand
rotation engines, designated RB and RD, and furnish clockwise propeller shaft rotation. Model 12006A is built for
port installation. The two engines of this model are left-hand rotation engines, designated as LB and LD, and
furnish counterclockwise propeller shaft rotation. See figure 1-2.
Figure 1-2. Engine Arrangement.
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