INFORMATION CONTROL CONSOLE
LOCAL OPERATING PANEL (LOP)--The
(ICC)--Part of the ECU. ICC No. 1 is used to
LOP is the local operating station for GTEs on
program and run the computer. ICC No. 2 is the
the FFG-class ships. It is located in the MER and
tape reader and is used to input the program into
is used primarily for maintenance.
the ECU.
LUBE OIL STORAGE AND CONDITION-
INLET GUIDE VANE (IGV)--The variable
ING ASSEMBLY (LOSCA)--The LOSCA is
vanes ahead of the first stage of compressor blades
mounted remotely from the GTE and is a unit
of a GTE. Their function is to guide the inlet air
with a lube oil storage tank, a heat exchanger, a
into the GTE compressor at the optimum angle.
scavenge oil duplex filter, and a scavenge oil
check valve (all mounted on a common base). Its
ISOCHRONOUS MODE--This mode is
function is to provide the GTE with an adequate
normally used for generator operation. This mode
supply of cool, clean lube oil.
provides a constant frequency for all load
conditions. When two (or more) generators are
MACHINERY CONTROL SYSTEM (MCS)--
operated in parallel, the isochronous mode also
Provides centralized and remote monitoring and
provides equal load sharing between units.
control of propulsion, electrical, auxiliary, and
damage control systems of the DDG-51 class ship.
JOULES--Unit of energy. The work done
when the point of application of 1 newton is
MAIN REDUCTION GEAR (MRG)--A
displaced a distance of 1 meter in the direction
locked train, double-reduction gear designed to
of force.
reduce the rpm output of the GTE and drive the
propeller shaft.
JP-5 --The primary type of fuel used for
helicopters and small boats. The emergency source
MAIN FUEL CONTROL (MFC)--A hydro-
of fuel for the GTEs and GTGs.
mechanical device on the propulsion GTE that
KILOWATT --A unit of electrical power
deceleration fuel flow, and stator vane angle
equal to 1000 watts. (A watt is a unit of power
for stall-free, optimum performance over the
equal to the rate of work represented by a
operating range of the GTE.
current of 1 ampere under a pressure of 1 volt.)
MASKER AIR SYSTEM--This system
KINETIC ENERGY--Energy in motion.
disguises the sound signature of the ship and alters
transmission of machinery noise to the water by
LABYRINTH/HONEYCOMB SEAL--This
emitting air from small holes in the emitter rings
s e a l combines a rotating element and a
on the ship's hull.
honeycomb stationary element to form an air seal.
Used in GTEs to maintain close tolerances over
MASS--The measure of the quantity of
a large temperature range.
matter contained in a body.
LABYRINTH/WINDBACK SEAL--This seal
METALLURGY --The science dealing with
combines a rotating element with a smooth
the structure and properties of metals and alloys,
surface stationary element to form an oil seal. The
and the processes by which they are obtained from
windback is a coarse thread on the rotating
ore and adapted to the use of man.
element of the oil seal which uses screw action
(windback) to force any oil that might leak across
MICRON--A unit of length equal to one
the seal back into the sump.
millionth of a meter.
LIQUID FUEL VALVE (LFV)--This valve
MIL--A unit of length equal to one
meters the required amount of fuel for all engine
thousandth of an inch.
operating conditions for the Allison 501-K17
GTE.
NAVY STANDARD DAY--Parameters
meeting the following requirements: sea level,
LOAD SHEDDING--Protects a generator
barometric pressure of 29.92 inches of mercury,
from overloading by automatically dropping
preselected loads when generator output reaches
humidity of 0.00 inch of mercury, and a
100 percent.
temperature of 59F.
AI-5
