center and a maximum travel of 60° to the left and right.
The sideslip indication on the engineer AMS display is
a digital numeric readout, with alpha characters showing
PORT and STARBOARD.
LCAC ELECTRICAL SYSTEM
The electrical power generation for the LCAC
provides alternating and direct current requirements for
power and lighting loads on the trail. The APU system,
generator set, and its associated auxiliary control
e q u i p m e n t are responsible for the generation of
120/208-Vac, 60-kW, 400-Hz, 3-phase power. The craft
i s organized into primary and secondary power
distribution. Power is distributed over a common,
redundant bus system in a manner that affords maximum
protection form battle damage and equipment failure.
Primary power consists of the craft generator 400-Hz ac
power and the external shore 400-Hz ac power systems.
unit (TRU) 28-V dc power system, the emergency
power system, and 28-V dc tank power receptacle. The
secondary 28-V dc system is also distributed over a
common, redundant bus.
AUXILIARY POWER UNIT
As shown in figure 7-16, the gas turbine generator
Figure 7-14.--Outside air temperature probe installation.
sets are mounted port and starboard on the LCAC. Each
set consists of an ac generator, air inlet chamber,
combustor assembly, turbine assembly, and reduction
gear drive assembly. The gas turbine engine is a
to the analog speed and sideslip indicator on the operator
single-stage turbine. The APU is a Turbomach Model
No. T-62T-40-7. Filtered air within the compartments is
used for turbine inlet combustion air and generator
The sideslip analog indication is displayed on the
cooling. An enclosure assembly houses each gas turbine
operator console as a left or right bar movement. (See
engine and provides mounting of the turbine, exhaust
fig. 7-15.) The bar movement has zero degrees at the
c o n n e c t i o n s , ship pipes, drain connections, and
electrical connections. The access doors provided on the
enclosure allow for inspection and maintenance of the
gas turbine components.
APU Turbine Engine
The major components of the gas turbine engine are
the generator, turbine, combustor and reduction gear
drive. In addition, electrical control devices, accessories
and associated plumbing and wiring are also part of the
gas turbine assembly. The gas turbine incorporates an
integral lubrication system. The lubricating oil is
contained in an integral oil sump on the bottom of the
Figure 7-15.--Operator station sideslip indicator.
reduction gear and accessory drive housing. A 24-V dc