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with defined limits which has an air
traffic control information and alerting
service. Abbreviation FIR
flight level flight level /flat lev(ə)l/ noun 1.
the level of constant atmospheric pressure
related to a reference datum of
1013.25 mb
FL 250 = 25,000 ft.
Abbreviation FL 2. the height at which
a particular aircraft is allowed to fly at a
particular time
flight line flight line /flat lan/ noun the area
of an airfield, especially a military airfield,
where aircraft are parked, serviced,
and loaded or unloaded
Flight Manual Flight Manual /flat mnjυəl/
noun same as Pilot’s Operating Handbook
flight operations flight operations /flat
ɒpəreʃ(ə)nz/ plural noun the use of
aircraft
flight path flight path /flat pɑθ/ noun a line,
course or track along which an aircraft
flies
flight plan flight plan /flat plan/ noun a written
statement that gives details of the
flight that a pilot intends to make
flight progress strip flight progress strip /flat
prəυ$res strp/ a thin cardboard strip
with information on it about a flight,
which is updated by air traffic controllers
as the flight progresses
flight simulator flight simulator /flat smjυletə/
noun a device or computer program
which allows a user to pilot an aircraft,
showing a realistic control panel and
moving scenes, used as training programme
flight-test flight-test /flat test/ verb to test the
performance of an aircraft or component
in flight
float float /fləυt/ noun 1. a floating ball
attached to a lever to regulate the level
of a liquid in a tank, etc.  float-operated
switch a shut-off valve operated
by a float 2. a hollow structure fixed
below an aircraft that allows it to float
on water. Also called pontoon  verb to
remain on the surface of a fluid without
sinking
Because of the air-tight
nature of the fuselage, most large aircraft
will float for some time before
sinking.
float chamber float chamber /fləυt tʃembə/
noun the part of a carburettor which
houses the float
floatplane floatplane /fləυtplen/ noun a seaplane
that has hollow structures
attached underneath its wings and
sometimes its fuselage on which it
floats so that the main body of the plane
is not in contact with the water. Compare
flying boat
flow flow /fləυ/ verb 1. to move or run
smoothly with continuity, as a fluid

Air flows over the wing surfaces and lift
is produced. 2. to circulate
Liquid
coolant flows around the engine.  noun
continuous movement in a particular
direction
The flow of fuel from the fuel
tanks to the engines.
99 fog
flowmeter flowmeter /fləυmitə/ noun a device
for measuring the flow of a liquid or gas

The oxygen flowmeter should blink
once for each breath.
fluctuate fluctuate /flktʃuet/ verb to vary or
change irregularly
The magnetic field
will fluctuate at the supply frequency.
fluid /flud/ noun a substance which
is not solid, whose molecules move
freely past one another and that takes
the shape of its container  de-icing
fluid a liquid for removing ice
fluorescent /flυə|res(ə)nt/ adjective
referring to the emission of electromagnetic
radiation of visible light
The fluorescent
penetrant process of flaw
detection uses a penetrant containing a
fluorescent dye which fluoresces in
ultra-violet light.
fly fly /fla/ verb to move through the air or
to cause an aircraft to move through the
air in a controlled manner
An aeroplane
may not fly over a city below such
a height as would allow it to alight in
the event of an engine failure.
He’s
learning to fly. (NOTE: flying – flew –
flown)  to fly in formation to fly as a
group which maintains a particular pattern
or arrangement in the air
fly-by-wire fly-by-wire /fla ba waə/ noun
technology which interprets movements
of the pilot’s controls and, with
the aid of computerised electronics,
moves the control surfaces accordingly

Using fly-by-wire technology, the
stalling angle cannot be exceeded
regardless of stick input.
The more
reliable and quick fly-by-wire system
allows a much greater degree of flexibility
　
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本文鏈接地址：Dictionary of Aviation上(92)