the Aviation Dictionary

fingers that enter the flutes of the tap. The tap is then
backed out of the hole by turning the extractor with a
wrench.
tape - In composites, a term used for thin unidirectional
material that is usually no wider than 12 inches. The
material may or may not be a prepreg.
tape laying - In composites, a manufacturing process
where prepreg tapes are laid across or overlapped to
build up a shape. The parts are sometimes vacuum
bagged --
and cured. This process can be automated by
the use of tape laying equipment
-
tape measure - A narrow strip (usually made of cloth or
steel tape) with graduations of centimeters, inches, feet,
etc. used for measuring.
taper - A gradual decrease in width or thickness from
one end of an object to the other.
taper in plan only - A gradual change (usually a
decrease) in the chord length along the wing span from
the root to the tip with the wing sections remaining
geometrically -
similar.
taper in thickness ratio only - A gradual change in the
thickness ratio along a wingspan with the chord
remaining constant.
taper pin - A device used for fastening concentric
shafts together to prevent relative motion between
them. The tapered pin is pressed into a tapered hole.
tave taxi vattems
tappet - The component in an aircraft reciprocating
engine that rides on the face of the cam and transmits a
reciprocating motion to the push rods to open the
valves in the engine cylinders. The hydraulic
valve lifters normally fit inside the tappets.
tare weight - The weight of all items such as blocks or
chocks used to hold an airplane on the scales when it is
being weighed. Tare weight must be subtracted from
the scale reading to determine the weight of the
aircraft.
target - In radar: Generally, any discrete object that
reflects or retransmits energy- back to the radar
equipment. Specifically, an object of radar search or
surveillance.
target blade - The identification of one blade of a
helicopter during electronic balancing. It is the blade
with the double interrupter.
target symbol - A computer-generated indication
shown on a radar display resulting from a primary
radar return or a radar beacon reply.
tarmac - A hard surfaced area of an airport used for
aircraft parking, tie-down, and servicing.
tarnish - A stain, blemish, or dull surface.
tarpaulin - A cover made of a large piece of heavy,
waterproof material fitted along its edges with eyelets
so ropes can be used for tying.
taper reamer - A reamer used to smooth and "true" tasks - Knowledge areas, flight procedures, or
tapered holes and recesses.
maneuvers within an area of operation of a practical
test standard. Each task includes a list of the type of
taper tap - A hand-operated thread cutting tap used to
aircraft category or class to which it applies and a
start the tapping process in a drilled hole. The tap
reference to the applicable regulation or publication.
tapers for the first six or seven threads.
tautening dope - Aircraft dope consisting of
tapered crankshaft - The crankshaft to which a
nitrocellulose and a plasticizer. The dope is applied to
propeller is mounted by fitting over a tapered end.
the fabric surface to produce tautness, increase
tapered propeller shaft - See tapered crankshaft.
strength, protect the fabrid, waterproof the fabric, and
tapered punch - A hand punch tapered in length and
make it airtight.
used to drive vins. bolts. or rivets from their holes. taxi - The movement of an airplane under its own power
on the surface of an airport (FAR 135.100-Note).
tapered roller bearings - An anti-friction bearing made
Also, it describes the surface movement of helicopters
of hardened steel cylinders rolling between two coneequipped
with wheels.
shaved. hardened steel races. Tavered roller bearings -
s .
are designed - to carry both thrust and radial loads.
taxi into position and hold - Used by ATC to inform a
pilot ti taxi onto the departure runway in takeoff
tapered-shank drill - A twist drill that has a tapered
position and hold. It is not authorization for takeoff. It
shank and is held in the chuck by friction
is used when takeoff clearance cannot immediately be
tapped - hole - A hole in a casting or other material with issued because of traffic or other reasons.
-
threads cut on the inside.
taxi lights - Lights similar to landing lights on an
tawed - - resistor - A wire-wound resistor that has taus aircraft, but specifically aimed to illuminate the runway
along the length of the wire in order to provide a choice or taxiway when the airplane is taxiing.
of multiple fixed resistances.
taxi patterns - Patterns established to illustrate the
tapped stud hole - A hole in which threads have been desired flow of ground traffic for the different runways
cut for installation of a stud.
or airport areas available for use.
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