航空術(shù)語(yǔ)詞典 Dictionary of Aeronautical Terms 上

時(shí)間：2011-03-11 23:11來源：藍(lán)天飛行翻譯 作者：admin 點(diǎn)擊：次

Collector rings are made of a conductive material such as copper or brass, and brushes normally made of a carbon compound ride on them to carry the current into and out of the rotor winding. Collector rings are also called slip rings.
collector ring (reciprocating engine exhaust system). A type of exhaust system used on radial engines. A collector ring is a corrosion-resistant steel manifold connected to the exhaust ports of all the cylinders.
Exhaust gases, collected from the cylinders, are dumped overboard at one location through a tail pipe.
collimated light. Light which has been passed through a collimator lens so all the rays are parallel, rather than converging or diverging.
collimator. An instrument which produces parallel rays of light.
collodion. Cellulose nitrate used as a film base for certain aircraft dopes.
colocate. To place two facilities at the same location. In radio navigation, VOR (very-high-frequency omnirange navigation) facilities may be colocated with TACAN (tactical air navigation) facilities. The combination of these facilities is called a VORTAC station.
color. The characteristic of light caused by the different wavelengths of the electromagnetic energy that make up the light. Violet light has the shortest wave lengths, and red, the longest.
color code. A method of using marks of different colors to identify materials. Some electrical resistors and capacitors have color codes to show their value and tolerances. Bungee shock cords use color codes to indicate the year and quarter of the year in which they were made.
Color codes are used to identify the type of steel in steel bars and rods. Colored bands are used around aircraft plumbing to identify the fluid being carried in the line.
color temperature. The temperature to which a perfect blackbody radiator would have to be heated to produce the same color as the source of light being measured. Color temperature is measured in degrees Kelvin (°K).
color tempering. A method of removing some of the brittleness from a piece of steel being heat-treated.
The steel part is heated red-hot and quenched in water, oil, or brine. A portion is then polished bright, and the part is reheated to a temperature indicated by the color of the oxide that forms on its surface. When the correct color of oxide forms, the heating is stopped, and the metal is again quenched.
color wheel. A device used for mixing paints which shows the primary colors and the various colors that can be made by mixing them. A color wheel helps visualize the results you will get when you mix different colors of paint.
combinational logic (digital electricity). Digital circuitry which incorporates gates whose logic outputs are determined by the logic states of the inputs. Combinational logic differs from sequential logic, in whose gates the states of the outputs are determined by the previous logic state of the inputs.
combination chuck (machine tool component). A four-jaw chuck used to hold a piece of material in a lathe. The jaws of a combination chuck can be moved in or out as a unit, or each of the jaws can be moved separately.

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