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TACAN: A military navigation system similar in concept to a combined VOR+DME transmitter.

TAIL DRAGGER: A tricycle gear aircraft featuring a tailwheel rather than a nosewheel.

TANK BUSTER: A military fighter-bomber aircraft whose primary role is the destruction of armored ground vehicles.

TAIL END CHARLIE: The rearmost aircraft in a formation.

TARMAC: Originally jargon for "tar Macadam", a mixture of two popular early coatings for surfaces on which vehicles travel. Today it is jargon for the surface of an airport apron regardless of the apron composition.

TAS: True airspeed, the actual speed of an aircraft through the air, derived from a combination
of ram air pressure, barometric altitude and outside air temperature (OAT).

TCA: Terminal Control Area, an obsolete airspace definition now known as Class B Airspace

TERRAIN MESH: Terrain mesh scenery became available starting with FS2000. The "mesh" is the ground altitude coordinates which are derived from real world data allowing for more accurate elevations that previously.

TCAS: Traffic Alert and Collision Avoidance System

TCH: Threshold Crossing Height, the height above the runway that an aircraft should cross the runway threshold on an ILS approach

TDZE: Touchdown Zone Elevation, the highest elevation in the first 3000' of the landing runway

TETRAHEDRON: A device normally used at non-tower airports to indicate the active runway; the pointed end indicates the landing direction

THRESHOLD: the beginning of the portion of the runway that is usable for landing

THROTTLE: Functional equivalent of an automobile accelerator pedal.

THRUST LEVER: The preferred term for a turbine engine "throttle".

TIBS: Telephone information briefing service providing continuous recording of meteorological and/or aeronautical information.

TICKET: A skill-level rating certificate, as in the "instrument ticket" that authorizes a pilot to operate an aircraft IFR (under instrument flight rules).

TORQUEMETER: A helicopter panel instrument that measures the torque being applied to the rotor by the engine's transmission, the idea being to stay within the transmission's operating limits.

TOUCH AND GO: A practice landing where the plane touchs downs, continues rolling, and takes off again

TOUCHDOWN ZONE: The first 3000' of the runway, beginning at the threshold

TOWER: The ATC facility that controls aircraft while they are in an airport's airspace. Tower control is usually visual but may be supplemented by specialized local radar.

TRACER: Any gun round with a flammable substance at its rear surface that allows the round to be tracked visually by daytime as well as at night.

TRACK: The actual path of the aircraft over the surface of the earth; in flight simulation often used to mean tracks of non-user controlled aircraft as generated by the FSTraffic add-on

TRAFFIC PATTERN: The traffic flow of airplanes landing and taking off from an airport, consisting of upwind, crosswind, downwind, base and final legs


TRANSLATIONAL LIFT: The additional component of lift generated by a helicopter's rotor disk as the aircraft begins to move forward.

TRANSPONDER: A device in a plane that responds to ground signals and returns information such as the squawk code, altitude, etc.

TRIM: Use of trim tabs to relieve control forces.

TRIM TAB: A small control surface that is used to deflect a larger control surface into the relative wind for purposes of trim control.

TRICYCLE GEAR: The landing gear configuration consisting of a nose wheel or bogie combined with a pair of main wheels or bogies.

TRSA: Terminal Radar Service Area, airspace surrounding certain airports where ATC provides radar vectoring, sequencing and separation

TURBOCOMPOUND: A piston engine design in which a turbine is placed in the engine exhaust gas stream in order to drive a supercharger without taxing engine power.

TURBOFAN: A turbine engine in which thrust is primarily due to a multibladed "fan" mounted at the front of the engine that acts as a kind of propeller.

TURBULENT FLOW: The breakdown of laminar flow into a trail of vortices.

TWEB: Transcribed Weather Broadcast is recorded weather information broadcast cointinuously over low frequency NDBs (190-535 kHz) and/or VORs.

TX: Teletype jargon for "transmit".


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