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vibrator for making and breaking
an electrical circuit
trend trend /trend/ noun 1. a general direction
or tendency
Continuous VOLMET,
which is normally broadcast on a
designated VHF (very high frequency)
channel, contains current aerodrome
reports and trends where available. 2.
an up-to-date or modern way of doing
things
Warning systems can take the
form of lights, captions, and aural signals,
and the modern trend is to incorporate
them into a central warning system.
triangle triangle /traŋ$əl/ noun a plane
figure with three sides and three angles

The triangle of velocities is a vector
solution of what happens to an aircraft
when wind causes drift.
wind1
trigger trigger /tr$ə/ verb to cause to operate,
to set off
Normally, both the captain’s
and first officer’s airspeed indicator
trigger an aural warning if the
airspeed limits are exceeded.
trijet trijet /trad"et/ noun an aircraft powered
by three jet engines
trim trim /trm/ noun a condition in which
an aircraft is in static balance in pitch

Trim indicators have a green band, to
show when the trim is correct for takeoff.
(NOTE: Some aircraft have rudder
and aileron trim.)  verb to adjust trimmers
in order to get the required handsoff
pitch attitude
Trim the aircraft for
level flight.
trim wheel trim wheel /trm wil/, trimmer
/trmə/ noun a wheel-shaped device,
sometimes situated between the front
seats of light aircraft, to trim the aircraft
by hand
The trimmer is used to ease
the loads imposed on the flying controls
during flight.
trip trip /trp/ verb to cause an electrical
device to suddenly stop working

Oscillating outputs from alternators
could cause sensitive equipment to malfunction
or trip.
triplane triplane /traplen/ noun an aircraft
with three main wings fixed one above
the other
triple triple /trp(ə)l/ adjective consisting of
three parts
Probes may be of single,
double or triple element construction.
tropical tropical /trɒpk(ə)l/ adjective referring
to the area between the parallels of
latitude 23° 26’ north and south of the
equator
Tropical air moving northwards
is subjected to surface cooling
and becomes increasingly stable in its
lower layers.
tropical storm tropical storm /trɒpk(ə)l stɔm/
noun a violent wind system which
forms over tropical oceans
Tropical
storms often dissipate when they pass
from sea to land.
tropics tropics /trɒpks/ noun  the tropics
the area between the parallels of latitude
23° 26’ north and south of the
equator
Throughout the tropics and
tropopause 238
sub-tropics, the sea breeze is a regular
feature.
tropopause tropopause /trɒpəpɔz/ noun the
level at which the troposphere and the
stratosphere meet
The altitude and
temperature of the tropopause are of
concern to aircrew because they affect
aircraft performance.
troposphere troposphere /trɒpəsfə/ noun the
lowest region of the atmosphere
The
troposphere is at its deepest near the
equator and shallowest near the poles.
trough trough /trɒf/ noun a long area of low
barometric pressure
Severe icing and
turbulence can be experienced when
flying through a trough and the precipitation
may be of hail, rain, snow or
sleet.
true true /tru/ adjective referring to a calculation
or reading which has been corrected
for errors
true airspeed true airspeed /tru eəspid/ noun
airspeed corrected for instrument and
position error in addition to altitude,
temperature and compressibility errors
true altitude true altitude /tru lttjud/ noun
real or actual height above sea level
true bearing true bearing /tru beərŋ/ noun
bearing with reference to true north, not
magnetic north
true degrees true degrees /tru d|$riz/ noun
degrees of direction measured from true
north, not magnetic north. Also called
degrees true. Symbol °T
true north true north /tru nɔθ/ noun the
direction towards north pole along a
meridian through the observer
tube tube /tjub/ noun a long, hollow cylindrical
device for holding or carrying
fluids
A liquid-type fire detector consists
of a tube and expansion chamber
filled with liquid.
　
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