时间：2011-03-11 23:11来源：蓝天飞行翻译 作者：admin 点击：次
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cable rigging tension chart (aircraft control cable). A chart, normally included in an aircraft maintenance manual, that shows the proper control cable tension for any given ambient air temperature. cadmium. A silvery-white, malleable, ductile, metallic chemical element. Cadmium’s symbol is Cd, its atomic number is 48, and its atomic weight is 112.40. Cadmium is used for plating steel aircraft hardware to protect it from corrosion. cadmium cell (electrical standard cell). A type of electrical standard cell which produces an accurate reference voltage for use when making precision electrical measurements. The voltage produced by a cadmium cell at 20°C is 1.0186 volts. cadmium plating. A form of corrosion protection for steel parts. A thin coating of cadmium is electroplated onto the surface of the steel part to be protected. The cadmium is more chemically active than the steel part it protects, and in the process of corrosion, the cadmium acts as the anode and is changed into cadmium oxide. This method of corrosion protection is called sacrificial corrosion. cage (verb) (gyroscopic instrument). The procedure of locking the gimbals of a gyroscopic instrument so it will not be damaged by abrupt flight maneuvers or rough handling. caging system (gyroscopic instrument). A mechanism inside a gyroscopic instrument that locks the gimbals in a rigid position and holds the gyro so it cannot tumble if the aircraft maneuvers exceed the tumble limits of the gyro. The caging system also restores a tumbled gyro to its operating position. calcium. A silvery, moderately hard, metallic chemical element. Calcium’s symbol is Ca, its atomic number is 20, and its atomic weight is 40.08. Calcium is used as an alloying element for other metals and as a component in plaster and portland cement. calcium carbide. A compound of calcium and carbon which decomposes, or breaks down, in water to produce acetylene gas. calculated landing time (air traffic control). A term that may be used in place of tentative or actual calculated landing time, whichever applies. calendar month. A period of time used by the FAA for inspection and certification purposes. One calendar month from a given day extends from that day until midnight of the last day of that month. A calendar month beginning on June 6 ends at midnight of June 30. calender (fabric treatment). To pass fabric through a series of heated rollers to give it a smooth and shiny surface. calibrated airspeed. See CAS. calibration (instrument accuracy check). The procedure in which the indication of an instrument is compared with a standard value. Calibration is done to determine the accuracy of an instrument. A pressure gage, for example, can be calibrated by comparing its readings with the known pressure produced by a dead-weight tester. |
