Aerospace Glossary Letter T

Tank Test – A voltage dielectric test in which the test sample is submerged in water and voltage is applied between the conductor and water as ground.
Tape Wrap – A spirally applied tape over an insulated or uninsulated wire.
TDM – Abbreviation for Time Division Multiplexing.
Tear Strength – The force required to initiate or continue a tear in a material under specified conditions.
Teflon – A DuPont Company trademark for polytetrafluoroethylene.
Tefzel – DuPont trade name for a fluorocarbon material typically used as the insulation on wire wrap wire.
Temperature Rating – The maximum and minimum temperature at which an insulating material may be used in continuous operation without loss of its basic properties.
Tempest – Classified procedure which details the complex measurement of the combined reduction of all electromagnetic emissions from specified equipment.
Tensile Strength – The pull stress required to break a given specimen.
Thermal Shock – A test to determine the ability of a material to withstand heat and cold by subjecting it to rapid and wide changes in temperature.
Thermocouple – A device consisting of two dissimilar metals in physical contact, which when heated, will develop an emf output.
Thermocouple Element – A thermocouple designed to be used as part of an assembly, but without associated parts such as the terminal block, connecting head, or protecting tube.
Thermocouple Extension Cable – A cable comprised of one or more twisted thermocouple extension wires under a common sheath.
Thermocouple Extension Wire – A pair of wires of dissimilar alloys having such emf-temperature characteristics complimenting the thermocouple which is intended to be used, such that when properly connecting allows the emf to be faithfully transmitted to the reference junction.
Thermocouple Wire (Grade) – A pair of wires of dissimilar alloys having emf-temperature characteristics calibrated to higher temperature levels than the extension type of thermocouple wire. Unlike the thermocouple extension wire, this wire may be employed as the thermocouple hot junction in addition to serving as the entire wire connection between hot and cold reference junctions.
Thermoplastic – A material which softens when heated or reheated and becomes firm on cooling.
Thermoset – A material which hardens or sets by heat, chemical or radiation cross-linking techniques and which, once set, cannot be resoftened by heating.
Tinned Copper – Tin coating added to copper to aid in soldering and inhibit corrosion.
Transmission Line – A signal-carrying circuit with controlled electrical characteristics used to transmit high-frequency or narrow-pulse signals.
Transmission Loss – The decrease or loss in power during transmission of energy from one point to another. Usually expressed in decibels.
Tray – A cable tray system is a unit or assembly of units or sections, and associated fittings, made of non-combustible materials forming a rigid structural system used to support cables. Cable tray systems (previously termed continuous rigid cable supports) include ladders, troughs, channels, solid bottom trays, and similar structures.
Tray Cable – A factory-assembled multiconductor or multipair control, signal or power cable specifically approved under the National Electrical Code for installation in trays.
Triaxial Cable – A cable construction having three coincident axes, such as conductor, first shield and second shield all insulated from one another.
Triple (Triad) – A cable consisting of three insulated single conductors twisted together.
Tubing – A tube of extruded non-supported plastic or metallic material.
Twinning – Synonymous with pairing.