時間：2011-03-11 23:18來源：藍天飛行翻譯 作者：航空 點擊：次
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Teflon. The registered trade name for a fluorocarbon resin. Because of its good resistance to chemical action and its strength at elevated temperatures, Teflon is used for fluid lines and backup rings in fluid power components. TEL (tetraethyl lead). An additive used in aviation gasoline to improve its antidetonation characteristics. Tetraethyl lead, Pb(C2H5)4, is a heavy, oily, poisonous liquid mixed with the gasoline at the refinery. Tetraethyl lead increases the critical pressure and temperature of the fuel. telemetering. A method used to transmit quantitative information from a vehicle in flight to a station on the ground where this information can be used. Airplanes, missiles, rockets, and other types of complex devices are equipped with many different types of instruments that measure movement, pressure, temperature, acceleration, and strain. The output from these instruments is coded and transmitted to flight test stations on the ground. Here it is decoded and given to the engineers in a form they can use to determine what is happening to the vehicle in flight. telescope (type of movement). To slide one section of an object into another section or into a slightly larger sleeve. The name comes from the sections of a telescope that slide into each other to make the instrument smaller to store when it is not in use. telescoping gage (measuring tool). A precision measuring tool used to measure the inside diameter of a hole. A telescoping gage consists of a hardened steel pin that slides, or telescopes, into a hardened steel sleeve. The pin is spring-loaded outward, and a T-handle, extending out from the center of the pin and sleeve, can be twisted to lock the pin in the sleeve. A telescoping gage with the correct range of measurement is put in the hole whose inside diameter is to be measured, and the lock is released. The spring pushes the pin and the sleeve against the sides of the hole. The gage is held level across the hole, and the lock is tightened. The gage is then removed from the hole, and its length is measured with a micrometer caliper. tellurium. A brittle, silvery-white, metallic chemical element. Tellurium’s symbol is Te, its atomic number is 52, and its atomic weight is 127.60. Tellurium is used in the production of corrosion-resistant steel. TEMAC. Trailing edge of the mean aerodynamic chord. See mean aerodynamic chord. temper (metal condition). The condition of a metal with regard to its strength and hardness. temperature. A measure of the intensity of heat, or the hotness or coldness of a body or material. Temperature is measured on one of four scales: Celsius, Fahrenheit, Kelvin, and Rankine. The three reference points used to measure temperature are: 1. Absolute zero, the point at which all molecular activity stops: All molecular activity stops at 0°K, 0°R, –273°C, and –460°F.
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