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voltage nears its nominal level and the
charging current decreases.
volume volume /vɒljum/ noun 1. the
amount of space occupied by a solid, a
liquid or a gas
If the pressure of a
given mass of gas is maintained constant,
the volume of gas increases as its
temperature is increased. 2. the loudness
of a transmission  turn down the
volume to make the sound less loud by
adjusting the volume control
volume control volume control /vɒljum kən|
trəυl/ noun a knob used to adjust the
sound by making it louder or less loud
VOR VOR noun a navigational aid based on
the ground, to help the pilot establish
the bearings of the aircraft. Full form
very high frequency omni-directional
radio range
COMMENT: The VOR projects 360
radials which can be followed to fly a
particular path over the ground. VORs
operate on VHF frequencies between
108.0 to 177.95 MHz.
VOR bearing VOR bearing /vi əυ ɑ beərŋ/
noun the direction of the VOR transmitter
relative to the aircraft measured in
degrees
VORTAC VORTAC /vɔtk/ noun a system
that combines VOR and Tacan
VSI VSI abbreviation vertical speed indicator
V/STOL V/STOL /vistɒl/ noun 1. a system
used by some aircraft that allows them
to take off and land vertically or on a
short runway 2. an aircraft that is able to
take off and land vertically or on a short
runway. Full form vertical and short
takeoff and landing
VTOL VTOL /vitɒl/ noun 1. a system used
by some aircraft that allows them to
take off and land vertically 2. an aircraft
that is able to take off and land vertically.
Full form vertical takeoff and
landing
vulnerable vulnerable /vln(ə)rəb(ə)l/ adjective
unprotected and liable to attack or
damage
Some engines still retain the
centrifugal type of compressor because
it is simple, comparatively cheap to
manufacture, robust in construction
and less vulnerable to damage.
W
WW abbreviation west
WAAS WAAS noun a US navigation system
which processes and improves data
from GPS satellites to provide location
information. Full form Wide Area Augmentation
System (NOTE: The European
equivalent is EGNOS.)
wake turbulence wake turbulence /wek
t%bjυləns/ noun the disturbance of
the air remaining after the passage of an
aircraft
wall wall /wɔl/ noun the side
There is a
film of oil between the piston and cylinder
wall.
warm front warm front /wɔm frnt/ noun an
advancing mass of warm air moving
over a mass of cooler air
warn warn /wɔn/ verb to give notice of possible
danger
A light illuminates to
warn the crew.
‘…ultrasonic technology which
automatically warns pilots of ice build-up
on aircraft may soon be approved for
general use by carriers’ [Flight
International 16–22 July 1997]
warning warning /wɔnŋ/ noun notice of
possible danger  adjective giving
notice of possible danger
The main
power plant fire detection system
should contain an audible warning
device to supplement the visual indication.
warning indicator warning indicator /wɔnŋ
ndketə/ noun an indicator which
gives notice of a possible problem
which may require some action.
VASI
warning light warning light /wɔnŋ lat/ noun a
small light, often red, which informs of
a possible danger by lighting up
At 5
knots above stalling speed, a warning
light on the instrument panel will flash.
washroom washroom /wɒʃrum/ noun same as
toilet 2
waste waste /west/ noun something which
can no longer be used
A smouldering
fire in a toilet waste container or waste
disposal bin could become very active
due to pressure changes during descent.
water-tight water-tight /wɔtə tat/ adjective
that does not leak water or other fluid
watt watt /wɒt/ noun the SI unit of measurement
of electrical power
The work
done by an electrical circuit or the
power consumed is measured in watts.
wave wave /wev/ noun 1. the motion by
which heat, light, sound or electric current
is spread
The speed of propagation
of radio waves is faster over sea
than over land. 2. a mass of water moving
across the surface of a lake or the
sea, rising higher than the surrounding
water as it moves
Wind speeds
　
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本文鏈接地址：Dictionary of Aviation下(105)