时间：2011-03-11 23:18来源：蓝天飞行翻译 作者：航空 点击：次
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nonabrasive (material characteristic). The characteristic of a material that keeps it from scratching another material when it is rubbed against it. nonapproach control tower (air traffic control). A control tower that authorizes aircraft to land or takeoff at the airport controlled by the tower or to transit the Class D airspace. The primary function of a nonapproach control tower is the sequencing of aircraft in the traffic pattern and on the landing area. Nonapproach control towers also separate aircraft operating under instrument flight rules clearances from approach controls and centers. They also provide ground control services to aircraft, vehicles, personnel, and equipment on the airport movement area. nonatomizing spray gun (paint spray gun). A type of spray gun that propels the material in a solid stream, rather than in the form of tiny droplets. noncomposite separation (air traffic control). Air traffic separation in accordance with minimums other than the composite separation minimum specified for the area concerned. nondestructive inspection. Any type of inspection that does not damage the system or component being inspected. X-ray is a system of nondestructive inspection that allows the inside of a device to be inspected without its having to be opened or in any way damaged. nondimensional number. A pure number which has no dimensional value assigned to it. Ratios, such as Mach numbers and Reynolds numbers, are examples of nondimensional numbers. nondirectional antenna (radio antenna). A radio antenna that receives or transmits signals from all directions with equal strength. nondirectional beacon (air traffic control). An L/MF or UHF radio beacon transmitting nondirectional signals with which the pilot of an aircraft equipped with direction finding equipment can determine his bearing to or from the radio beacon and home on or track to or from the station. When a radio beacon is installed in conjunction with an instrument landing system marker, it is normally called a compass locator. nonenergizing brakes. See nonservo brakes. nonferrous metal. A metal that does not contain iron. nonflexible control cable. Steel aircraft control cable made of either 7 or 19 strands of solid wire. Nonflexible cable can be used only for installations in which the cable does not pass over pulleys. noninductive load (electrical load). An electrical load that does not have any inductance. Its opposition to current is caused by resistance and/or capacitance. |
