the Aviation Dictionary

trial plan - A proposed amendment that utilizes
automation to analyze and display potential conflicts
along the predicted trajectory of the selected aircraft.
POSITIVE
Glass
Mica
Nylon
Fur
Silk
Paper
Cotton
Wood
Acrylic
Polystyrene
Rubber
NEGATIVE
triboelectricity - The production of static electricity by
contact or friction between different materials.
trick questions - A question deliberately written in such
a way as to cause the student to select the wrong
answer even though the student knows the material.
trickle charger - A battery charger that applies a very
small constant charge to a battery in order to maintain a
full charge on the battery.
trickle charging - A constant current charging method
that keeps cells on standby service at full charge by
passing a small current through them until they are
removed from the charger and returned to service.
trial ulan . triule-slotted flap
trigger pulse - An electric pulse applied to certain
electronic circuit elements to start or trigger an
operation.
triangle - A three-sided, enclosed plane figure.
triggering transformer - A high-voltage transformer
Eonnected in series with an igniter in a high-energy
triangulation - In navigation, a method of determining
ignition system for a turbine engine. The transformer
location by drawing lines from two or more known
places a high voltage across the igniter, ionizing the
locations in order to determine the position of the
gap and producing the triggering spark.
unknown point. The lines from the known locations,
drawn either by sight or electronically, will cross at the trigonometry -The branch of mathematics dealing with
location of the unknown point.
the ratios between the sides of a right triangle and the
application of these facts in finding the unknown side
triboelectric series - A list of materials capable of
of any triangle.
producing static electricity by contact, friction, or
induction. Some materials that build up static triiet - An aircraft propelled by three iet engines. -
electricity easily are flannel, silk, rayon, amber, hard
trim - The adjustment of an aircraft's controls to get a
rubber, and glass. In the following list, materials at the
top of the list become positive to materials lower on the
balanced or stable condition of flight.
list:
trim devices - Any device designed to reduce or
eliminate pressure on the control stick or yoke. When
properly trimmed, an aircraft should fly at the desired
airspeed with no control pressure from the pilot (i.e.,
"hands off'). Trim mechanisms are either external tabs
on the control surface or a simple spring-tension
system connected to the control stick or yoke.
tri-cresyl-phosphate - 1. A plasticizer used as a
rejuvenator to restore resilience to dope film. 2. A toxic
substance used in lubricants.
tricycle gear - This type of fixed landing gear consists
of two main wheels located on either side of the
fuselage and a third wheel, nosewheel, positioned on
the nose of the airplane.
tricycle landing gear - The landing gear of an aircraft
positioned so the main wheels are behind the center of
gravity and the nose is supported with a nose wheel.
Aircraft Technical Book Company
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trim tab - A small auxiliary hinged portion of a
movable control surface that can be adjusted during
flight to a position resulting in a balance of control
forces.
trimetrogon - A system of aerial photography that uses
one vertical and two oblique shots of terrain taken
simultaneously in order to properly map the contours
of the landscape.
trimmer - A potentiometer, generally with a
screwdriver-adjusted slider used for fine tuning a
circuit.
triode - A vacuum tube having three active electrodes.
trip-free circuit breaker - A circuit protection device
that opens a circuit when a current overload exists
regardless of the position of the control handle.
triphibian - An aircraft landing gear configuration with
the ability to operate from the ground, on snow and ice,
and from water.
triplane - An airplane having three main supporting
wing surfaces, usually located one above the other.
triple thread - A system using three threads cut into a
fastener. The second and third threads begin 120' after
the previous thread. This type fastener allows tightly
spaced threads without the small lead (distance fastener
moves each revolution) that would normally result with
a fine threaded. . single-thread - fastener.
triple-slotted flap - A high lift device used to reduce
the takeoff or landing speed by changing the lift
characteristics of a wing during the landing or takeoff