what the aircaft black box?

The black box is an automatic recorder that every plane must fly. It allows to detect the cause in case of an accident.

Little things to know about plane black boxes

The black box detaches itself from the plane - The key to the investigation after the accident

Why need to find the black box of aircraft after each accident?

Black box - in fact not to talk about the color of the box. This device is in fact orange, this color is used to make rescue teams easier to find.

It essentially refers to two small devices, namely the cockpit recorder (CVR) and the flight data recorder (FDR), which operates continuously and uses electricity from the host's engine. In addition, there is also an additional feed source to ensure signal maintenance when detached from the aircraft.

The black box records the operation of all aircraft from the start of take-off. It provides instructions on movement of speed, the altitude of aircraft, . Each information appears as a hole in a thin strip of metal. This recording device is firmly placed in a shockproof, very tight and non-flammable box. In case of accident it is still protected intact. In addition, the black box is equipped with a guide system that allows it to be located even under water.

The recording device in the pilot's cockpit and the black box helps identify the cause of the accident, even when the flight is no longer available and increases the safety of the aircraft.

When the plane crashed into the sea or river or lake, the signaling device sent out the ultrasound . Normally, black boxes can withstand temperatures as high as 1,100 degrees Celsius for 30 minutes continuously and soak under depths of up to 6,100 meters in 30 days.

Black box placement.(Photo: BBC)

Each signaling device is capable of transmitting ultrasonic waves once a second and continuously during this time. This is the time when teams looking for black boxes must take advantage of them to identify them, before losing their ability to search completely.

After every plane crash, it is the thing that is most concerned about, even no less, to rescue the victims or solve the consequences.

Why is that?

Simply because an accident has happened anyway, but if a black box is found, one can find out the cause , overcome the shortcomings and prevent future accidents.

Black "box".

When a black box is found, investigators will have to analyze the logs . This process may take two or three days depending on the length of the flight as well as the security complexity. Currently only a few countries in the world have the technology to do this, including the US, Canada, Australia, England and France.

Today, with the level of scientific development, satellite communication network can fully receive and store data of most flights around the world. But why didn't they do that, so they had to find a small black box and could only survive for the last 30 days?

In fact, this technology has been deployed on hundreds of aircraft around the world. However, this number is still too small compared to the global network of aircraft and routes.

Most airlines still maintain the black box because the cost of upgrading is too high. According to a study from 2002, every US air cargo could have to spend an additional $ 300 million a year to maintain this global data transmission network . Meanwhile, the number of accidents that occur for each item is not much, and if so, the cost of recovery is much softer than the cost of maintaining the expensive network.

The ability of the black box actually only promoted after the plane crashed. If everything goes well, perhaps there's no need to know what a black box is.