What is a Black Box Warning?

In fact, the "black box" is a common name. Its real name is common: "Flight Data Recorder (FDR)". It is an instrument that stores the flight conditions of the aircraft. When the "misfortune" happens and you need to know the flight conditions, you can play them through some equipment.

Aircraft black box

In fact, the "black box" is a common name. Its real name is common: "

What exactly is an airplane black box

In a box (also called a small box, but this box

Currently, there are two types of black boxes installed on most passenger and military aircraft.

The first is a black box called an aircraft data recorder (FDR), which specifically records various data in flight, such as flight time, speed, altitude,

With the rapid development of technology, the black box is constantly being updated. 1960s

According to European standards, the black box must be able to withstand an impact force of 2.25 tons, and it will not be damaged for 10 hours at a high temperature of 1100 ° C. To meet the following criteria. Black boxes are usually made of ferrous metal and some high-performance heat-resistant materials. It has strong fire resistance, pressure resistance, shock and vibration resistance, seawater (or kerosene) immersion, and magnetic interference resistance. Even if the aircraft has completely damaged the recorded data in the black box, it can be kept intact.

The black box is not black, but often orange-red, mainly for eye-catching colors and easy to find. The appearance is a rectangular parallelepiped with a solid shell, which is about four or five bricks. When the plane crashes, there is a positioning beacon on the black box, which is equivalent to a radio transmitter. After the accident, it can automatically emit a specific frequency so that

More than 20 years ago, a military plane exploded over Norway, the plane crashed and the pilot died. Norwegian authorities rushed to the scene of the accident and identified the plane's wreckage and the body of the pilot as a military reconnaissance aircraft of a major country. Norway protested against a major country, and a major country denied it. Later, Norway found the black box on the plane and analyzed the data recorded in the black box to reveal the truth. A great power had to admit its mistakes in the face of iron evidence.

What exactly is a black box? In fact, the "black box" is a common name, and its real name is very common: flight data recorder. It is an instrument that stores the flight conditions of the aircraft. When you need to know the flight conditions later, you can release them through the playback device.

In a box, a magnetic recording device is installed, which can record what the pilot said, the pilot's external communications and flight data in real time. It can keep all kinds of information 30 minutes before the plane accident. In this way, it is convenient to analyze the fault after the fact. The earliest use of the black box was military aircraft. In 1908, the first military aircraft accident occurred in the United States. In the future, as flight accidents increase, there is an urgent need for an instrument to study the cause of the accident. During World War II, flight recorders were officially used on military aircraft. After the war, it began to be used on civil aircraft. Early recording methods were relatively backward, using mechanical recording methods, which were recorded on photographic paper. After the magnetic recording method was invented, it became convenient and reliable.

So why is the flight recorder called a "black box"? It turned out that in order to ensure that this equipment was not damaged after the accident, a sturdy box was specially made for it. This box is resistant to high temperatures (600 ° C to 800 ° C), high pressure (withstands a pressure of 1 ton), and is not afraid of corrosion. In fact, this metal "black box" is not black. The "black box" is not named according to its own color, but is regarded as an ominous object in an air crash, hence the name "black box".