Where is the rocket cabin that crashed after launching the rocket?

Rocket cabin is not accurate, rocket is just a common name. Scientifically divided into launch vehicles and ballistic missiles. Although the latter is preparing for war, it will also conduct experiments and test launches at ordinary times. Things falling on it can be divided into wreckage and manual return. When the launch fails, the wreckage may fall off, especially if the first stage has not yet fallen off. It is dangerous to fall back to or near the launch site at this time, so the site selection and safety precautions of the launch site will be considered; Normally, a rocket/missile in normal operation will fall after running out of fuel. However, due to the different heights of rocket bodies and different launch trajectories (such as suborbital launch), only the fragments of the first and second stage rockets will fall back to the earth relatively intact, and most of the rest will burn in the upper atmosphere, or only unburned fragments will fall. In order to minimize the damage to the ground caused by this situation, the space launch site should be selected at the seaside as far as possible and launched in the direction of the sea, so that if it falls into the sea, even if there is a ship, the probability of collision is very small.

However, there are still a considerable number of land launch sites in use in the world. At this time, in order to avoid the damage caused by debris, only when choosing the location of the launch site, we should fully consider the population under the rocket trajectory. However, some launch sites are in poor conditions and need to be notified in advance. The population in the affected areas should try to avoid it and combine certain loss compensation measures to solve it. As rocket engine debris often remains a small amount of fuel, and some of the fuel is toxic, as long as it is found, the government will send someone to recycle it.

Artificial return includes the return capsule of recoverable satellite, usually the film capsule of remote sensing satellite or the test capsule of past scientific satellite. When testing ballistic missiles, telemetry instruments are usually installed in the head, some of which need to be recovered after falling into the shooting range, and there are manned return capsules for manned space flight. These returns can be splashed on the sea, recovered by the fleet, or recovered on the ground. When recycling at sea, the return capsule with intelligence value may be robbed or stolen because it is generally on the high seas. Land reclamation also affects houses or flows into rivers. The United States has also developed a technology to recover the membrane cabin in the air by using a special fork on the nose of the transport aircraft to open the umbrella rope. After remote sensing satellites can transmit data, they are not needed.

The falling part is in the wreckage area, which is the wreckage of the Long March 3 in Shibin, Guizhou.

When the rocket is launched, the upper stage will enter the orbit with the spacecraft, and then it will be manually controlled to re-enter and burn over the high seas. In this case, it usually burns directly in the air or the debris falls into the sea, which has nothing to do with ordinary people.

The first few stages of the launch, especially the first stage, cannot enter the orbit without reaching the first cosmic speed during separation, so they will continue to fly forward at the separation speed and land in a parabolic trajectory. The landing zone is generally hundreds to more than a thousand kilometers on the extension line of the rocket launch trajectory. South Korea's rocket launch process marks the first-class rocket crash.

In order to avoid injuries caused by falling debris, the launch site near the sea usually allows rockets to fly to the open sea, so that the falling first-class debris will fall into the high seas, and it is only necessary to temporarily inform nearby ships to stay away, which will not affect people's production and life. After the launch, the wreckage of the launch site on the east and west coasts of the United States fell into the Atlantic Ocean and the Pacific Ocean respectively. The Kourou launch site in French Guiana, which is commonly used in European countries, also fell into the Atlantic Ocean when it was launched eastward. The wreckage of Wenchang launch site in Hainan, China, also landed on the southeast high seas, which did not cause much impact.

But some inland launch sites are not so lucky. The main landing site of the first-class rocket wreckage of Xichang Launch Center is in Guizhou, and the center is in Jiucang Town, renhuai city. The main landing site of the first-class rocket wreckage of Taiyuan Launch Center is Shiyan City, Hubei Province, and the main landing site of the first-class rocket wreckage of Jiuquan Satellite Launch Center is Suining County, Hunan Province. Although these places are relatively remote and have low population density, they still suffer huge losses due to falling debris. The falling debris itself will hit the house and hurt people. At the same time, due to the widespread use of highly toxic fuels such as nitrogen tetroxide and hydrazine in launching rockets in China, the red and yellow smoke emitted by fuel residues after landing will also bring great health and environmental hazards.

Every time a rocket is launched, Fiona Fang will receive a forecast for dozens of kilometers, evacuate people, close factories and schools, and the public security, fire protection, medical care, electric power and other departments will stand by at any time. The government will organize a special working group to give each household an evacuation order. Even if it is late at night, it is not allowed to stay at home and must go out. These security measures are necessary and reflect the responsibility of the local government to the residents, but they will also lead to the suspension of local normal life and various direct and indirect economic losses. See:/hangyedongtai/2017-05-12/42695.html for the local cooperation in rocket launching. See the documentary "Paradise Falling" filmed by Zhang Zanbo, Suining County, Hunan Province for the impact of rocket launching on people's lives in the falling area.

In order to solve these problems, the voice of developing rocket fixed-point recovery technology in aerospace field is getting higher and higher. To develop liquid oxygen kerosene rockets and build a new launch site in Hainan, one of the major considerations is to prevent debris from falling inland and injuring people.

What falls cannot be collectively called a rocket cabin. If the satellite falls, it's an accident. Under normal circumstances, if the launch is successful, it will fall into the propulsion cabin. Because the high-orbit satellites launched now need a lot of launch fuel, in order to achieve a heavier goal, multi-stage propulsion will be adopted. After the first stage of combustion, the propeller will be separated from the rocket together with the fuel tank, usually falling in the atmosphere. When the satellite leaves the atmosphere, the fairing will fall off.

If it is a missile launch system, the relevant propulsion components will fall back to the ground after launch. If it is a satellite launch system, its primary propulsion components will fall back to the ground, while other components will stay in space for a long time and become space junk, which is why there are so many space junk at present.

Rockets are divided into manned spacecraft and rocket boosters. After the rocket is launched, it is not a spaceship (rocket cabin) but a booster and a fairing. Most of them are burned in the atmosphere, and the rest are officially recycled, which is also the reason for the large area around the launch site. The manned spacecraft has a special landing site.

During the ascent, a part of the rocket will fall off in the middle, while a part will go into space to perform related tasks and return to Earth after a certain period of time. Let's start with these two parts.

We usually fall halfway and become wreckage, and the latter is manual return, such as manned return capsule and so on.

Regarding the wreckage, there are two reasons for falling off, one is the normal fall after the fuel is exhausted, and the other is the failure of launch. Under normal circumstances, the falling place of this kind of wreckage will be affected by gravity, wind and other factors, so every time you launch a rocket, you should either choose a deserted place, such as the sea, or evacuate people as soon as possible to reduce potential safety hazards.

Today, "recyclability" has become a new trend of rocket development. For example, Space Exploration Technology Company, a space transportation company founded by Musk, and its Falcon 9 rocket have successfully completed the recycling of first-class rockets for many times, including land recycling and sea recycling. Just a few days ago, it completed another transportation task and successfully recovered it at sea. However, it should be pointed out that the rocket recycling of Space Exploration Technology Company only refers to the recycling of first-class rockets. As for the second-stage rocket, according to Musk, they will try to recover the second-stage rocket when the Falcon heavy launch vehicle flies for the first time later this year.

Look at China again. In the past, rockets were generally recovered by parachute+airbag and vertical landing, but the rockets recovered in this way could not be reused.

Chen Hongbo, director of the General Office of the R&D Center of the First Hospital, said that the launch vehicle will connect the first stage and the second stage in parallel, which means that the first stage and the second stage of the reusable launch vehicle will not be separated during the launch process, which will be more conducive to recycling.

Using recycling technology, the first and second stages will be able to realize the idea of "where to launch" in the future launch process. In this way, we don't have to worry about some labor costs and financial losses caused by the falling wreckage.

As for artificial return, it seems that no more effective technology has been developed except parachutes and airbags.

What should be asked is, where did the wreckage fall after the rocket was launched?

After launch, rocket fragments will fall, pass through the atmosphere and fall into the falling area. Calculate the falling area and falling events in advance, and notify the personnel to leave in advance to ensure the safety of personnel.

When the rocket is launched, some fragments will fall off, that is, the heat insulation material will expand and deteriorate when heated, so that part of the heat generated on the rocket can be taken away, the temperature of the rocket body can be reduced, and the temperature of the rocket body can be kept within a safe range.

These fuel tanks will fall to the ground in a free fall. However, when launching a rocket, the flight trajectory of the rocket must be accurately calculated. The fallen engines and tanks at all levels have accurate time nodes for fuel exhaustion and shutdown, so that a more accurate landing zone can be selected, usually in the no-man's land of mountains and seas, and then professionals can recycle them according to the positioning signals.

It usually falls to the earth and is recycled.

If you have watched the live launch or demonstration of a rocket, you will know that things will fall one after another when the rocket is launched. So what exactly did these fall off? How to deal with it?

Generally speaking, the sub-polar rocket is the first thing that falls after the rocket takes off. Shortly after the rocket was launched, it completed the propulsion task, left the rocket and fell to the ground in a parabolic shape. As for its landing point, it has already been calculated. Therefore, before the rocket is launched, a recovery area of about tens of square kilometers will be demarcated in advance, residents will be evacuated and martial law will be imposed. Then if the third-stage rocket is launched, the second-stage rocket will also fall, but it usually flies to the far sea and will not affect the land residents.

Due to the influence of air buoyancy and wind resistance, the fairing generally does not fall at a great speed, so it generally does not hurt people or things on the ground. Depending on the launch site, the area where the fairing falls off will generally fall in sparsely populated places such as Gobi Desert and Guizhou mountainous area. Moreover, the fairing will not carry other things, so if it falls in places that are not easy to be found, such as deep mountains and forests, it will generally not be recycled.

It says the fall and abandonment of rocket propulsion. Where did the rest of the rocket fall after it was launched?

After launch, rocket fragments will fall, pass through the atmosphere and fall into the falling area. Calculate the falling area and falling events in advance, and notify the personnel to leave in advance to ensure the safety of personnel.

Where did the rocket go after the satellite was launched and the star and arrow separated?

Take the launch of Chang 'e II in China as an example. After the separation of the first and second stages of Chang 'e-3 C rocket, the shell and engine of the first stage rocket are required to land in a specific area in southwest China. Later, it was reported that the specific location was in Shibing, Zhenyuan and Cengong counties in Qiandongnan Prefecture of Guizhou Province. The second stage propeller will land at sea about 500 kilometers east of Taiwan Province Province. The third stage (that is, the rocket part after the separation of the star and the arrow) flies above a certain orbit in space (so-called space junk) and may fall down in a few years.