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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equalization (battery servicing operation). A procedure used with nickel-cadmium batteries to bring all the cells to exactly the same state of charge. The battery is completely discharged and all the cells are shorted and allowed to stand for several hours with the shorting straps in place. Then the battery is given a constant-current charge to restore 140% of its ampere-hour capacity. equalizer circuit (aircraft generator system). A circuit used in a multiengine generator system that causes the generators to share the electrical load equally. A low-resistance shunt, called an equalizing resistor, is installed between each generator and ground so all the current produced by the generator flows through it. The voltage drop across the equalizing resistors is sensed by the voltage regulators to control the output of the generators. When one generator carries more than its share of the load, the voltage drop across its equalizing resistor is greater than that across the resistors of the other generators. The voltage regulators sense this difference and decrease the voltage of the generator carrying the greater part of the load, and in this way force the other generators to carry their share. equalizing resistor. A large resistor in the ground circuit of a heavy-duty aircraft generator through which all of the generator output current flows. The voltage drop across this resistor is used to produce the current in the paralleling circuit that forces the generators to share the electrical load equally. equipment ground (electrical equipment). A connection inside a piece of electrical equipment between a metal part that does not carry current and the earth ground. Equipment ground is carried out of the equipment through a green wire connected to the round pin in the standard three-pin electrical plug. The function of equipment ground is to reduce the possibility of electrical shock. equipment list (aircraft documentation). A list of all the equipment approved for installation on a particular aircraft. An equipment list itemizing the approved equipment installed on the aircraft must be kept current and with the aircraft records. equivalent airspeed. Calibrated airspeed corrected for errors caused by the compressibility of the air inside the pitot tube. Calibrated airspeed is the airspeed shown on the airspeed indicator, corrected for errors caused by the instrument installation. 14 CFR Part 1: “The calibrated airspeed of an aircraft corrected for adiabatic compressible flow for the particular altitude. Equivalent airspeed is equal to calibrated airspeed in standard atmosphere at sea level.” equivalent flat-plate area (aerodynamics). The area of a flat surface perpendicular to the direction of motion of the body that produces the same opposition to the airflow as the streamlined body. equivalent resistance (electrical circuit). The resistance of a single resistor that is the same as that of several resistors connected in a circuit. |
