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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inboard. The direction in an aircraft toward its center line. incandescent. Glowing because of intense heat. Carbon particles inside the cylinder of a reciprocating engine can absorb enough heat from the burning gases to become incandescent, or glow. These incandescent particles are the cause of preignition. incandescent lamp. A form of electric lamp in which a white-hot, incandescent filament produces light. The filament is enclosed in a glass bulb from which all the air has been removed and replaced with an inert gas, such as argon. The inert gas replaces oxygen so the filament does not burn up when it becomes white-hot. Incandescent lamps produce a large amount of heat as well as light. INCERFA (ICAO). A situation in which there is uncertainty as to the safety of an aircraft and its occupants. inch of mercury. A unit for measuring absolute pressure. One inch of mercury is the amount of pressure needed to support a column of mercury one inch (2.54 centimeters) high. Standard atmospheric pressure will support a column of mercury 29.92 inches high. inch-pound (measure of torque). A measure of torque, or the rotation that is caused by a force of one pound acting one inch from the center of rotation.. inch-pound (measure of work). A measure of work accomplished when a force of one pound moves an object a distance of one inch. incidence board (airplane rigging tool). A triangular board used when rigging the incidence in the wing of an airplane. The airplane is leveled, the incidence board is held along the bottom of one of the wing root ribs, and a level is held against the bottom of the board. When the bottom of the board is level, the wing is set to the correct angle of incidence. See angle of incidence. inclined plane. One of the basic machines used to gain mechanical advantage. The other basic machines are the lever and the wheel. A loading ramp which is a plane surface forming an angle with the horizon is an inclined plane. A force of only 100 pounds is needed to roll a 400-pound drum of oil up onto the bed of a truck, three feet high, if the drum is rolled up a ramp 12 feet long. inclinometer. An instrument used to measure the attitude of an aircraft relative to the horizontal. An inclinometer is usually made of a curved glass tube, partially filled with a clear liquid and holding a black glass ball. The curved tube is mounted in line with either the lateral or longitudinal axis of the aircraft, so the ball is in the center when the aircraft is level. When the aircraft tilts, the ball remains at the low point of the tube and shows the number of degrees the aircraft is tilted. inclusion (metal casting defect). A defect in a metal casting caused by nonmetallic impurities, such as carbon or sand trapped in the molten metal when it was poured into the mold. An inclusion weakens the casting and makes proper machining difficult. |
