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smaller in volume Liquids will expand
or contract as a result of temperature
changes. Opposite expand
contraction contraction /kən|trkʃən/ noun the
decrease in volume of a substance
brought about by cooling Due to contraction,
the length of a mercury column
shortens. Opposite expansion
contrail contrail /kɒntrel/ noun same as
vapour trail
contrast contrast /kɒntrɑst/ noun 1. the
amount of light and dark in something
seen Contrast and colour enable a
pilot to identify ground features. 2. the
difference between two things There
is an enormous contrast between the
performance of the two aircraft. in
contrast to when compared with Air
at altitude is cold in contrast to air at
the surface.
contribute contribute /kən|trbjut/ verb to
give or provide as part of the whole
Exhaust gases contribute to engine
power. although the weather was
bad, pilot error contributed to the
accident pilot error was partly responsible
for the accident
contribution contribution / kɒntr|bjuʃ(ə)n/
noun 1. the part that something plays in
making or causing something The differences
in the effect of solar radiation
on land and sea make the biggest contribution
to weather and climate. 2. the
act of contributing or something, especially
money, that is given or provided
contributor contributor /kən|trbjυtə/ noun a
person or thing that contributes to
something There are other factors
which cause the division of the lower
atmosphere into two layers but the
ozone effect is a major contributor.
57 conventional
control control /kən|trəυl/ noun 1. the
authority or ability to direct somebody
or something 2. crowd control the
management of the movements of large
numbers of people 3. checking or examining
verb to direct, to manage or to
make a machine, system, procedure,
etc., work in the correct way The purpose
of the centrifugal switch is to control
the starting and ignition circuits.
(NOTE: The word control in English is
used in a different way to similar words
in other languages. In English, the verb
check is more often used to mean ‘look
at and verify’ while control is used in
the sense of ‘to make something work
in a particular way’: the yoke and rudder
pedals are used to control the
movement of the aircraft. Note also:
controlling – controlled.)
area control area /kən|trəυl eəriə/ noun
the airspace above a particular area on
the ground, which is controlled by a
particular authority. Abbreviation CTA
control column control column /kən|trəυl kɒləm/
noun the main hand control used by the
pilot to control the aircraft in roll and
pitch
controlled airspace controlled airspace /kən| trəυld
eəspes/ noun airspace which is governed
by rules and regulations which
pilots must comply with. Abbreviation
CAS
controller /kən|trəυlə/ noun 1. a
device which ensures that something
operates in the correct way the propeller
speed controller 2. a person who
manages systems to ensure the smooth
operation of procedures
controls controls /kən|trəυlz/ plural noun
manual or automatic devices that are
used to control a machine, a system,
etc., or to make a machine, a system,
etc., work in a correct way the pilot at
the controls of the aircraft the pilot
who is operating the flying controls
control surfaces control surfaces /kən|trəυl
s%fsz/ plural noun moveable aerofoils,
usually on the wings and tailplane,
which can be operated from the
cockpit by the pilot, thus changing aircraft
attitude
control tower control tower /kən|trəυl taυə/
noun a tall building on an airfield from
which air-traffic controllers organise
incoming and outgoing aircraft by
speaking to their pilots by radio
control zone control zone /kən|trəυl zəυn/ noun
a designated ATC area. Abbreviation
CTR
convection convection /kən|vekʃ(ə)n/ noun the
process by which hot air rises and cool
air descends Heat is transferred from
the Earth’s surface upwards largely by
convection.
convective convective /kən|vektv/ adjective
referring to convection, or something
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Dictionary of Aviation上(54)
