the Aviation Dictionary

engine compartment - engineered performance standards
engine compartment - The area of an aircraft in which
the engine and its components and accessories are
located.
engine compressor - The section of a turbine engine in
which the air is compressed before it enters the burner
section.
engine conditioning - An integrated system of engine
checks and tests whereby engines can be brought up to
or kept in top operating condition. Two of the most
important checks of engine conditioning are the
compression test and the cold cylinder check.
engine controls - The controls required for the proper
operation of an aircraft engine. They include the
throttle, mixture control, propeller pitch control,
carburetor heat, engine cowl flap control, and the
ignition switch.
engine cycle - 1. The cycle of events that must be
accomplished in the transformation of chemical energy
into mechanical energy. The two most common cycles
of events are the Otto cycle, which describes the events
of the reciprocating engine, and the Brayton cycle,
which describes the transformation taking place in a
turbine engine. 2. One takeoff and landingas recorded
by an airline. Also described as one start and one stop
of the engine or sometimes as one full advance and
retard of the throttle. The latter two situations require
special recording procedures for maintenance runs if
cycle times are needed.
engine gauge unit - A three-in-one instrument used to
show the operating condition of an engine. It houses a
fuel pressure, oil pressure, and oil temperature gauge in
one case.
engine history recorder - An electronic data collection
device on some newer engines which records the
number of times certain normal operating parameters
such as speed and temperature are reached.
engine inoperative loss of directional control
demonstration - This demonstration is required
during a multi-engine practical test to show the control
pressures necessary to maintain directional control with
one engine inoperative. This demonstration should be
accomplished within a safe distance of a suitable
airport, and the entry altitude should allow completion
no lower than 3,000 feet AGL. Since actual VMC
varies with existing condition, the pilot should not try
to duplicate the published VMC, which was established
during initial certification. Pilots should expect a loss
of directional control at a speed that may be higher
than the published VMC. Remember, as altitude
increases, actual VMC decreases, and under some
weight and altitude combinations, VMC and stall speed
are the same. This means that the loss of directional
control demonstration cannot be accomplished safely.
Pilots should be prepared to recover at the first
indication of stall or loss of directional control,
whichever occurs first. The bottom line is that the
intent of the engine-out loss of directional control
demonstration is to demonstrate the onset of control
limits. Normally, this occurs when the nose begins to
move even though full rudder is applied.
engine logbook - A record book of an aircraft engine's
time in service, maintenance performed, inspections,
etc.
engine mount The structure used to attach an engine
in the airframe. It normally includes shock mounts.
engine mounting pads - The shock absorbing units
connected between the engine and the engine mount.
engine nacelle - The streamlined, enclosed housing on a
wing or fuselage in which the engine is mounted.
engine performance -- The relationship between power,
RPM, fuel consumption, and manifold pressure of an
engine.
engine pressure ratio (EPR)- In gas turbine engines,
the ratio of turbine discharge pressure divided by
compressor inlet pressure. Displayed in the cockpit as
an indication of engine thrust.
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engine ratings - The engine power ratings as type
certificated by the FAA. These ratings list thrust or
shaft horsepower at takeoff, cruise, etc.
engine ring cowl - The ring-shaped covering over the
cylinders of a radial engine for the purpose of
streamlining and improving the airflow through the
engine.
engine seizure - The locking-up or stopping of an
engine because of some internal malfunction.
engine stations - In gas turbine engines, numbered
locations along the engine length, or along the gas path
used for the purpose of identifying pressure and
temperature points, component locations and the like.
engine stroke - In a reciprocating engine, the distance a
piston travels from bottom dead center (BDC) to lop
dead center (TDC). Engine stroke is equal to two times
the crankshaft throw.
engine sump - The lowest point in the engine from
which the oil may be drained.
engine trimming - The adjustment of the fuel control
unit of a gas-turbine engine.
engine-driven air pump - An air pump driven from an
accessory drive on the engine. Also referred to as a
vacuum pump.
engineer - A person who practices the profession of
engineering. In the United Kingdom an engineer is an
aircraft maintenance technician.
engineered performance standards - A
mathematically derived runway capacity standard.
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