时间：2011-03-11 23:13来源：蓝天飞行翻译 作者：admin 点击：次
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emulsion. A suspension of small globules of one material in another, when the two materials will not mix. Oil and water will not mix, but they can be formed into an emulsion. An emulsion will separate into its components when it is allowed to sit. emulsion-type cleaner. A chemical cleaner used to loosen dirt, grease, oxides, and carbon deposits from the surface of an aircraft. Solvents are mixed with water and a petroleum product, such as naphtha. An emulsifying agent is used to form an emulsion with these products that do not normally mix. The cleaner is sprayed on the dirty surface and allowed to remain long enough to penetrate the surface contamination and reach the metal. Then it is washed off with hot water or steam. enamel. A type of finishing material that flows out to form a smooth surface. Enamel is normally made of a pigment suspended in some form of resin. When the resin hardens, it leaves a smooth, protective surface that may have either a glossy or a velvet finish. Polyurethane enamel is an exceptionally durable, chemical-resistant finish used on modern aircraft. encapsulate. To completely cover, or encase, something. An electrical component is encapsulated when it is completely covered with, or embedded in, a plastic material. enclosed relay (electrical component). An electrical relay in which both the coil and the contacts are enclosed in a protective housing. Enclosed relays are used in aircraft for the main battery contactor and for the starter relay. encode. To convert analog information, such as the degrees of rotation of a shaft, into a digital code. encoding altimeter (aircraft flight instrument). A special type of pressure altimeter used to send a signal to the air traffic controller on the ground, showing the pressure altitude the aircraft is flying. Pressure altitude is the altitude shown on the altimeter when its barometric scale is adjusted to the standard sea level pressure of 29.92 inches of mercury, or 1013.2 millibars. The altimeter provides a signal showing the altitude in one-hundred-foot increments to the radar beacon transponder. The transponder sends this information in coded form to the ground radar, where it shows up on the radar screen in numbers beside the radar return from the aircraft. endothermic action. A chemical action in which heat energy is absorbed. endurance (aircraft specification). The length of time an aircraft can remain in the air. The power produced by the engines and the flight conditions can be regulated to give the aircraft the greatest speed, the greatest range, or the greatest endurance. end voltage (battery servicing term). The cell voltage of an aircraft battery agreed upon by the battery manufacturing industry to indicate when a battery is discharged. A closed-circuit voltage of one volt per cell is the end voltage of a nickel-cadmium aircraft battery. When the cell voltage gets down to one volt, the battery is considered to be discharged. energizing brake. A brake that uses the momentum of the aircraft to increase its effectiveness by wedging the shoe tightly against the brake drum. Energizing brakes are also called servo brakes. A single-servo brake is energizing only when moving in the forward direction, and a duo-servo brake is energizing when the aircraft is moving either forward or backward. |
