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一架飞机拖黑带,奇怪的飞机降落北京
拖黑烟的飞机当然不是好飞机,冒黑烟的发动机当然也不是好发动机。至少不环保,也不美观嘛!但具体一点说,航空发动机经常有“富油”和“贫油”两种状态。发动机燃烧是燃油与氧气发生化学反应,两者最好永远比例完美。如果油太多用不完,就叫做“富油”,此时黑烟就会比较多。
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