航空术语词典 Dictionary of Aeronautical Terms 上

时间：2011-03-11 23:11来源：蓝天飞行翻译 作者：admin 点击：次

The air inside the cylinder is heated as it is compressed and, when the piston is near the top of its stroke, the air is very hot. A fuel injector sprays a very fine mist of fuel into the hot air and the fuel ignites and burns. Heat added by the burning fuel expands the air and pushes the piston down.
diesel fuel. A hydrocarbon fuel used in a compression-ignition engine. Diesel fuel, obtained by fractional distillation of crude oil, is the fraction that distills off just after kerosine.
dieseling (reciprocating engine malfunction). A condition in which an aircraft reciprocating engine tries to run after the ignition is turned off. Dieseling normally occurs when the engine is overheated. Carbon particles inside the cylinders become incandescent and ignite the fuel-air mixture in the cylinder and keep the engine running.
difference. The amount by which one quantity is greater or less than another. The answer in a subtraction problem is called the difference.

differential aileron travel (airplane control system). The difference between the upward and downward
travel of an aileron. An aileron moves a greater number of degrees upward than downward to counteract adverse yaw.
The downward-moving aileron produces both induced and parasite drag, but the upward-moving aileron produces only parasite drag. To prevent the combined drag causing the nose of the airplane to start to move toward the down aileron, the up aileron travels a greater distance, producing enough additional parasite drag to overcome the induced drag caused by the down aileron. See adverse yaw.
differential amplifier (electronic amplifier). An amplifier with two inputs and one output. The signal on the output is an amplification of the difference between the signals on the two inputs.

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