One manufacturing test for data recorders involves firing them from a cannon into a wall to simulate an aircraft suffering a catastrophic crash landing while traveling at hundreds of miles an hour.
生产这些数据记录仪时的测试之一就是用大炮将它们射向一面墙,来模拟飞机在以数百英里的时速飞行的情况下遭遇毁灭性坠毁着陆时的情景。
The recording material is itself insulated against accidental deletion and the corrosive effects of sea water.
记录仪本身的材料可以防止任何意外删除及海水腐蚀。
Modern black boxes record up to 300 factors of flight including:
现代黑匣子可以记录多达300中飞行数据,包括:
Airspeed and altitude
飞行速度和高度
Heading and vertical acceleration
航向及垂直加速度
Aircraft pitch
飞机俯仰
Cockpit conversations
驾驶舱对话
Radio communications
无线电通话
The safety precautions are designed to ensure, theoretically, that accident investigators will be able to recover the recorders, compile a full picture of an aircraft's last moments from the recordings and then accurately explain what went wrong.
理论上来说,这些安全防范措施是为了确保事故调查人员能找到这些记录仪,通过所有记录的内容了解到飞机在出事前最后时刻的整体状况,以便准确解释事故原因。
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