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6 Technologies of information and communication
(also F).
7 Turbine impingement control.
tic Visual marking pulse on telemetry readout indicating
time intervals, often every 0.5 s (see time *).
TICA Turbine impingement control actuator.
TICC Technical Information and Communications
Committee (ATA).
TICCS, TIC 2 S Target information command and
control system.
tick Audible marking pulse serving as regular (often
infrequent, eg each 10 s or 60 s) time signal.
ticket Pilot’s licence (colloquial, especially pre-1914).
TICM Thermal-imaging common module(s).
TiCo Titanium-colombium.
Ticonal Magnetic alloy of Ni/Co plus a little Al/Cu.
tic-tac airplane Miniature free-flight aircraft for sonicboom
research.
TID 1 Tactical (or target) information display.
2 Touch input device.
3 Technical-interface description.
tiddleywinks effect Tendency of nose gear to project
stones and other loose objects laterally.
TIDLS, Tidals Tactical information data-link system.
TIDP Telemetry and image data processing.
TIDS Tactical [or Terma] integrated dispenser system.
tie Structural member normally loaded in tension.
tie bar Filament-wound tension member connecting
helicopter main-rotor blade to hub; fatigue-proof because
of large number of load-bearing members. Also called
dog-bone.
TIEC Tactical information exchange [datalink] capability
(RAF).
tied gyro Gyro whose rigidity is related to Earth rather
than space; eg that in traditional horizon has axis tied by
gravity aligned with local vertical.
tied on Air-intercept code: “Aircraft indicated is in
formation with me.”
tiedown 1 Picketing arrangement based on steel spiral
for aircraft left in open (originally US).
2 Cargo lashing.
tiedown diagram Drawing illustrating method of
securing particular type or item of cargo in particular
vehicle (DoD).
tiedown helicopter Non-flying prototype for testing and
endurance running of dynamic parts.
tiedown point Permanent attachment point for cargo
provided on or in vehicle (DoD); hence * pattern.
tiedown test Rocket engine static test.
tie rod General term for tie of rod-like form, esp. with
threaded ends.
tiers Different levels assigned to subcontractors in
major programme; Tier 1 are usually assigned responsibility
for design and test, as well as manufacture.
Ties Tactical information exchange system.
TIF, Tif 1 Takeoff inhibit function, temporarily
suppresses all non-essential cockpit warnings.
2 Text interchange format.
3 Terminal interface function.
4 Tactical Imagery Intelligence Flight [not TIIF]
(RAF).
TIFS 1 Total in-flight simulator.
2 Total inflight-shutdown [rate].
TIG 1 Tungsten inert-gas welding.
TIM
2 Time of ignition.
Tiger 1 Targeting by image georegistration.
2 Terrifically insensitive to ground effect radar.
tightening Tendency of aeroplane or glider trimmed for
level flight to increase rate of a commanded turn or dive
pull-out, demanding a push force on stick or yoke to hold
constant g.
TIGO Prefix, US piston engine, turbocharged, directinjection,
geared, opposed cylinders.
TiGr Titanium/graphite composite.
TII Threshold inspection interval.
TiiMs Texas Institute for Intelligent Bio-Nano
Materials and Structures for Aerospace Vehicles.
til Until.
tile 1 Thin-film or thick-film substrate; also occasionally
used for substrate of solar cell.
2 Discrete unit of surface thermal-protection system for
RV or large spacecraft, eg Space Shuttle, inspectable and
replaceable.
TILL, Till Tracking [and] illuminating laser (ABL), also
interpreted as target illuminating laser.
TILS Tactical ILS.
tilt 1 Angular deviation of locus of centroids of sections
of helicopter main-rotor blade from plane of rotation
(BSI). Measured as forward or backward though actually
up/down.
2 Angular movement or offset of camera axis about
aircraft longitudinal axis (NATO).
tilt angle Angle between axis of air camera and aircraft
vertical (OZ) axis; normally angle at perspective centre
between photograph perpendicular and plumb line
(NATO).
tilt-body vehicle Usually synonymous with tilting
fuselage, standing upright on its tail for VTOL. A totally
different species has the wing and power (lift/propulsion)
system able to rotate up to 90° with respect to the freepivoted
wing and tail; this family are usually STOLs.
tilting-duct VTOL VTOL aeroplane which in hovering
mode is lifted by ducted propellers or fans rotated through
approx. 90° for translational flight.
tilting-engine/jet/propeller/wing Same definition as
above but for different pivoted component. Tilting-jet
means entire engine is pivoted.
tilting fuselage Unusual class of VTOL aeroplanes in
which fuselage can be pivoted near mid-length, in some
cases complete with attached wing, in order for jet thrust
to act vertically. Also called nutcracker aircraft.
tilting head 1 Rotorcraft head pivoted about lateral axis
relative to supporting structure.
2 Machine-tool cutter and drive pivoted about horizontal
axis.
tilting-nozzle VTOL Not used; term is jet-deflection,
vectored-thrust, lift/cruise, vectoring or vectored-jet.
tilt-rotor 1 VTOL aeroplane lifted in hovering mode by
one or (usually) more rotors which are rotated through
approx. 90° for translational flight.
2 A rotor arranged to operate with axis vertical or horizontal.
tilt-wing VTOL aeroplane whose wing, carrying
complete propulsion system, is pivoted upwards through
approx. 90° in vertical mode, thrust then exceeding total
weight.
TIM 1 Total inventory management.
701