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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earth ground (electrical equipment). An electrical connection to a metal cold-water pipe or metal rod driven into the ground. The neutral conductor in a three-wire, single-phase electrical installation normally connects to earth ground. earth induction compass (navigation instrument). A form of navigation instrument which gets its directional reference from lines of magnetic flux of the earth cutting across the windings of a flux valve mounted in the aircraft. The output of the flux valve is used to drive the pointer of the radio magnetic indicator (RMI) or some other type of direction indicator. earth’s magnetic field. The magnetic lines of flux that leave the north magnetic pole and travel over the surface of the earth and re-enter it at the south magnetic pole. EARTS (enroute automated radar tracking system). An automated radar and radar beacon tracking system. It functions much the same as terminal ARTS IIIA, except that it is capable of employing both short-range and long-range radars, it uses full digital radar displays, and has a fail-safe design. Easy-Out (hand tool). The registered trade name for a type of screw extractor (a tool used to remove broken screws or studs from their holes). An Easy-Out is made of hardened steel and has a tapered, left-hand spiral. A hole is drilled in the broken shank of the screw, and the Easy-out is screwed into it by turning it to the left. The spiral wedges tightly into the broken screw and allows the Easy-Out to unscrew it from its hole. ECAM (electronic centralized aircraft monitor). An electronic instrument system that monitors the functions of the entire aircraft and displays the information on two color multifunction displays in the aircraft cockpit. The left-hand display shows the status of the systems, and the right-hand display shows diagrams and additional information about the system shown on the left-hand display. eccentric. Two or more circular objects turning in the same plane, but having different centers. eccentric bushing (airplane rigging component). A special bushing used between the rear spar of certain cantilever airplane wings and the wing attachment fitting on the fuselage. The portion of the bushing that fits through the hole in the spar is slightly offset from that which passes through the holes in the fitting. By rotating the bushing, the rear spar may be moved up or down to adjust the root incidence of the wing. eccentric cam. A circular cam mounted on a shaft, with its center different from the center of the shaft. As the shaft rotates about its axis, the outside of the eccentric rises and falls, changing rotary motion into linear motion. ECCM (electronic counter-countermeasures). Tactics used in military aircraft to reduce the effectiveness of the countermeasures used by the enemy against electronic countermeasures. |
