Why does the instrument inside the black box record the accident?

The black box automatically records the last hour of the flight.

The key is not the instrument inside the black box. Instead, when something happens, the pilot will write down the cause of the accident and put it in a black box.

The black box is a recording instrument on an airplane.

One is a flight data recorder. It can record the aircraft's altitude, speed, heading, climb rate, descent rate, acceleration, fuel consumption, landing gear release, Greenwich Mean Time, as well as flight parameters such as aircraft system working conditions and engine operating parameters. The other is the cockpit voice recorder.

It is actually a radio call recorder that can record all kinds of calls on the plane. The four audio tracks on this instrument record the conversation between the pilot and the ground command structure, the dialogue between the principal and co-pilot, and the speech of the captain and flight attendant to the passengers. Threats, **, abnormal engine sounds, and various sounds in the cockpit.

The black box provides investigators with information about the operation of the aircraft's systems prior to the accident.

Because air crashes occur in a short moment, sometimes the pilot and all flight attendants are killed at the same time, it will be very difficult to investigate the cause of the accident, and the flight data recorder can provide people with the moment of the plane crash and the period before the crash, the flight status of the aircraft, the working conditions of the equipment on board, etc. The cockpit language recorder can help people analyze the cause of the accident according to the various conversations of the people on board, so as to make the correct conclusion about the accident.

In order to withstand the violent impact and high temperature flames of the plane crash, the shell of the black box has a thick steel plate and many layers of thermal and impact protection material. And in order to be as safe as possible, the black box is usually installed in the safest part of the tail of the aircraft, that is, the part that is least vulnerable to damage in the event of a crash, in the event of a plane crash, the black box can withstand 30 minutes of barbecue in a flame of 1100 degrees Celsius, can withstand the squeeze of a 2-ton object for 5 minutes, can be soaked in gasoline, engine oil, oleace, batteries, acid, seawater for several months, in short, it can survive in many harsh conditions. Even with this protection, the black box was damaged in some air crashes, so the international aviation agency set stricter standards, and the recording medium was improved from a tape type to a static storage recorder that could withstand a greater impact, similar to the memory chip in a computer.

Actually, the black box is not black, and it is painted bright orange in order to make it easier for people to search, perhaps because people think that the things stored in it are of great significance for the identification of aircraft accidents, but it is too mysterious, so they use such an equally mysterious name "black box".

This black box records the parameters in detail, including the altitude, speed, heading, pitch angle, roll angle, vertical speed of the flying machine, and the operation of the crew such as the steering wheel, the rod, the gauge and the throttle.

The second black box provided the data of the air traffic control Lei Qing Tan Zhouda, the ground and air reputation communication between the crew and the air traffic control unit, and the data link between the aircraft and the ground to transmit information, etc., which is conducive to confirming the cause of the crash of the Shishan plane

Being able to find out the direct cause, being able to carry out a short leg on the cause of the crash of the potato shirt can save some data of the aircraft. It can let us know what happened before the plane fell into the cavity, let us know some conversations in the plane, and can see the process of the plane falling and disappearing.

The recorded parameters are still relatively detailed, about 1000 or so, mainly for us to answer the important parameters such as the altitude and speed of the aircraft at that time, as well as the vertical speed, pitch angle and crew operation, and the amount of laughter in front of the steering wheel.

It may be more trembling and complete to form the entire story chain of the incident, which can determine the last moment of the accident or the time of the cave, and provide more complete evidence for the analysis of the cause of the accident.