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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Wing-tip vortices settle below the airplane, and those produced by heavy airplanes can cause lighter aircraft flying into them to be thrown out of control. wink Zyglo. See blink Zyglo. wiper (electrical component). The movable contact in a potentiometer, rheostat, or wafer-type switch. The wiper is controlled by rotating the shaft that extends through the center of the device, and as the wiper is rotated, it makes contact with a part of the resistance element or with one of the fixed contacts of the switch. wire braid. A woven, flexible metal covering placed over electrical wiring that carries alternating current. Energy radiated from the wire is intercepted by the braid and carried to ground, rather than allowing it to cause radio interference. wire bundle (aircraft electrical system component). A group of electrical wires routed through a compartment of the aircraft. The wires are grouped together and secured with nylon straps or lacing cord into a compact bundle, and the bundle is secured to the aircraft structure with cushioned clamps. wire cloth. A screen made by weaving wire into a sheet. wire edge (sheet metal defect). A sharp burr that forms on the edge of a sheet of metal when it is cut with a dull shear. wireless. The British term that means the same as “radio,” used in the United States. wire stripper (electrical maintenance tool). A tool used to remove insulation from an electrical wire without nicking or otherwise damaging the strands. wire-wound resistor (electrical component). An electrical resistor made by winding a strip or ribbon of high-resistance metal or high-resistance wire around an insulating core. Connections are made to both ends of the resistance element, which is then covered with a baked-on ceramic material. W/M injection (turbine engine thrust augmentation). A system in which a mixture of water and methanol (methyl alcohol) is injected into the compressor inlet and/or the combustion chamber of a turbine engine. The W/M injection increases the thrust by increasing the mass of the air flowing through the engine. It also cools the gases flowing through the turbine so more fuel can be burned before reaching the limiting turbine inlet temperature. W/M injection is not used on modern turbine engines. wobble pump (fluid pump). A type of hand-operated pump used to move a fluid such as gasoline or oil. The handle of a wobble pump is attached to a flat plate inside a housing that is equipped with four flapper-type check valves. Moving the handle back and forth (wobbling it) pulls fluid into one side of the pump and forces it out the other side. Wood’s metal. The registered trade name for an alloy of bismuth, lead, tin, and cadmium. Wood’s metal melts at 158°F. woodruff key. A hardened steel key made in the shape of a half circle. The rounded side of the key fits into a semicircular keyway cut into a shaft. The flat end fits into a slot cut into a wheel or disk mounted on the shaft. The key prevents the wheel or disk from turning on the shaft. |
