the Aviation Dictionary

temDerature scales terminal velocitv
temperature scales - 1. Celsius, formerly known as response to an aircraft's progress and its current
centigrade, is based on the freezing point of water as 0" relationship to other arrivals.
and its boiling point as 100". Absolute zero is equal to -
273" on the Celsius scale. 2. Fahrenheit is based on the tera -Trillion. A metric prefix equal to 1 x 10'~.
freezing point of water as 32" and its boiling point as
terminal - 1. A connecting fitting in the form of a ring
212". Absolute zero is equal to -460' on the Fahrenheit
that attaches to the end of a wire. Used for connection
scale. 3. Kelvin is based on the freezing point of water
to a battery, terminal strip, or other component. 2. A
as 273°K and its boiling point as 373". Rankine is
keyboard and video monitor that allows a user to
based on the freezing point of water as 492" and its
interface with the computer.
boiling point as 672".
terminal area - A general term used to describe
temperature-dewpoint spread - The difference
between the air temperature and the dewpoint.
airspace in which approach control service or airport
traffic control service is provided.
tempering - A heat-treatment process in which some of
terminal area facility - A facility providing air traffic
the hardness is removed from a metal to increase its
control service for amving and departing IFR, VFR,
toughness and decrease its brittleness.
Special VFR, and on occasion enroute aircraft.
template - A pattern made of any suitable material to
permit the layout of parts with a minimum expenditure
terminal control area (TCA)- A control area normally
located where air traffic routes converge in the vicinity
of time and effort. It should be rigid and accurate and
of one or more airfields. No longer valid for U.S. - still
have pertinent data marked on it.
valid for foreign - airspace.
tensile load -An external force that tends to lengthen or
terminal control area [ICAO] - A control area
stretch a body.
normallv established at the confluence of ATS routes
tensile strength - The ability of an object to resist in the vicinity of one or more major aerodromes.
forces tending to stretch or lengthen it.
terminal doppler weather radar (TDWR)- Installed
tensile stress - The forces that attempt to pull an object at many U.S. airports vulnerable to thunderstorms and
apart.
microbursts. The use of Doppler ..
radar provides a
narrower radar beam and with greater power, a more
tensiometer - A measuring instrument used to
comprehensive wind shear picture is available for wind
determine the installed tension of aircraft control
shear prediction.
cables.
terminal forecast (FT)- Provides weather conditions
tension - The stress produced in a body by forces acting
expected to occur within a five nautical mile radius of
along the same line but in opposite directions.
the runway complex at an airport.
tension adjusters - Devices installed in an aircraft
terminal radar service area - Airspace surrounding
control system that maintain a constant cable tension,
designated airports wherein ATC provides radar
regardless of the temperature-caused dimensional
vectoring, sequencing, and separation on a full-time
changes in the airplane.
basis for all IFR and participating VFR aircraft. The
tension regulators - See tension adjusters.
AIM [and ~e~~esen ATC section] contains an
explanation of TRSA. TRSA's are depicted on VFR
tension torsion bar - A strap made of layers of sheet
aeronautical charts. Pilot participation is urged but is
steel used to absorb tension of centrifugal loads
not mandatory.
between the rotor blades and the hub. The tension
torsion bar also absorbs the tension in the torque that terminal radar service area (TRSA) (USA) -Airspace
results from blade pitch changes. -
surrounding designated airports wherein ATC provides
radar vectoring, sequencing and separation on a fulltension
torsion strap - A strap made of wire used to
time basis for all IFR and participating VFR aircraft.
serve the same purpose on a helicopter rotor head as
Service provided in a TRSA is called Stage I11 Service.
the tension torsion bar.
Pilots' participation is urged but is not mandatory.
tentative calculated landing time (TCLT)- A
terminal strip - A strip of insulating material that
projected time calculated for adapted vertex for each
contains terminal posts to which aircraft wiring is
arrival aircraft based upon runway configuration,
attached.
airport acceptance rate, airport arrival delay period, and
other metered arrival aircraft. This time is either the terminal velocity - The speed of an aircraft at which the
VTA (vertex time of arrival) of the aircraft or the
drag has reached such an amount that the airplane will
TCLTIACLT (actual landing time calculated) of the
no longer accelerate.
previous aircraft plus the AAI (arrival aircraft interval),
whichever is later. This time will be updated in
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