Let go life: The "black box of the flight data recorder" on the plane: why is it installed on the plane? What exactly is it?

After a plane crash, people on the ground will always do everything possible to find the "black box of the flight data recorder" that fell from the plane and decipher the cause of the flight accident. So, do you know what a "black box of the flight data recorder" is? Why are there "black boxes of the flight data recorder" on planes? What color is it? Below, the author will answer the question for you.

Question 1: What is the "black box of the flight data recorder" on the plane?

The long tail of "black box of the flight data recorder" (that is, the popular name) is called "flight information recording system", which is one of the electronic recording devices dedicated to aircraft.

There are usually two "black boxes of the flight data recorder" on a plane. Cabin sound recorder and flight data recorder, respectively.

1. Cabin Sound Recorder

This is a tape recorder. It generally only retains the sound for the 30 minutes before it stopped recording. It started to work from the start of the flight, and kept recording all the sounds in the cockpit.

2. Flight data recorder

Instantly record various data on the plane to tape.

It is understood that in the early days, it could only record more than 20 kinds of data, and now it can record more than 60 kinds of data. Among them, 16 kinds of the aircraft's acceleration, attitude, thrust, fuel volume, and the position of the control surface are important and mandatory data. Its recording time range is the last 25 hours, and the recordings before that will be automatically erased.

The "black box of the flight data recorder" on the plane is square and made of special alloys, which can withstand a high temperature of 1100 ° C for up to 0.5 hours, can withstand the violent impact of the plane's explosion, and can also withstand long-term immersion in sea water.

Why do we always find it after a plane crash? Thanks to its function: it can automatically and continuously emit an electronic signal "sound pulse" for 30 days after the plane crash. We can detect this electronic signal even at a distance of 6,000 meters from the seabed where it is located.

Question 2: What color is the "black box of the flight data recorder" on the plane?

We all call it a "black box of the flight data recorder", but it's not actually "black," it's "orange." "Black box of the flight data recorder" is just a conventional name.

Orange is used for the "black box of the flight data recorder" because it's eye-catching, easy to find, and it acts as a warning if it falls into the sea with sharks, so that it won't be swallowed.

In fact, its conventional name "black box of the flight data recorder" still has a source. It is understood that all the electronic instruments in the early aircraft were placed in black square boxes of the same size and shape, and the voice recorder was placed in a more solid black square box. Later, it was found that it was very difficult to find after the air crash, so it was changed to "orange".

Question 3: Why is there a "black box of the flight data recorder" on the plane?

It is a witness. If the plane is in an accident or breaks down, it can help people investigate what is really going on at the time. The "black box of the flight data recorder" is the most important and direct evidence to understand the cause of a flight accident.