Is the spacecraft disappearing because of the two explosions?This is not the core reason

More than thirty years ago, for the first time in elementary school, I saw the appearance of a spacecraft in the textbook. At that time, the spacecraft did symbolize human universe dreams.

Why is the former spacecraft so eye -catching? Before the emergence of aerospace planes, Feitian is by no means that ordinary people can try. Only astronauts who have been trained can control the space stroke. The overload of the spacecraft is only 1.5G to 3G. In theory, even the elderly and children can take it to experience a space journey, which means that everyone has the opportunity to go to space. However, 30 years have passed. Instead of leading humans to realize the universe dream as expected, the spacecraft has withdrawn from the stage of history. Why is this?

Some people say that the retirement of the spacecraft is not related to the two explosions.

In the history of the United States, five aerospace planes have been manufactured, and two of them have exploded, and all the astronauts on the spacecraft are killed. The probability of this accident is a bit higher. Two explosive spacecraft are "Challenger" and "Colombia". The challenger exploded after 73 seconds, and the cause of the accident was because of a sealed ring worth $ 900. In order to avoid the flames of the solid rocket fuel booster, there is a sealing pad at the connection, and there is an O -shaped sealing ring on the sealing pad. Essence However, this sealing ring created by artificially synthetic rubber is not resistant to high temperature. Due to the low temperature, the sealing ring was invalid due to too low temperature. In the end, the flames were burned out of the plug -in fuel cabin to cause explosion.

The explosion of the challenge occurred in 1986, and the tragedy occurred again in 2003. This time the explosion was Colombia.

The Columbia occurred after returning to the atmosphere, and the cause of the accident was because of a foam material. Shortly after the Columbia was launched, three foam materials were off outside the fuelbox and had a impact with a spacecraft. The impact occurred in the front edge of the left wing of the aircraft. The internal structure of the left wing melted, which led to the occurrence of accidents. Although there were accidents in the two aerospace planes before and after, from the cause of the accident, it seemed to be an accident. How could the United States retire from the aerospace aircraft because of accidents?

On the surface, the two aerospace plane accident seemed to be an accident, but the accident contained inevitable.

Aerospace aircraft is an extremely complicated and precise machine. The entire body contains too much element. We know that the more functions, the easier it is to have problems. The complex structure leads to the result of too low system security. So, the retirement of the spacecraft is really because of two explosions? It is really related, but this is probably not the core factor. The core reason for the retirement of the aerospace aircraft is that the original intention of designing and manufacturing its intention has not been achieved. Why should humans be designed and manufactured? In essence, it is to be able to use the capability of aerospace aircraft to achieve the purpose of reducing the cost of launch.

At the beginning of the aerospace aircraft design, the expected valid load transmission cost was $ 1109 per pound, and in fact, the effective load transmission cost of the aerospace aircraft was $ 3,7207 per pound, which was a bit outrageous.

The actual launch cost is more than 30 times the expected cost, and the cost of this cost has not been calculated. This is the cost calculated based on the valid load per pound. If it is calculated at the cost of each, it sounds even more outrageous. According to the data given by NASA, the actual cost of each launch of the spacecraft is about $ 806 million, which is high enough, but this data does not match the actual budget of the spacecraft plan. If the latter is followed by the latter Calculate, the launch cost must be turned over again.

Why is the launch cost that can be recycled and reused?

On the surface, the aerospace aircraft can indeed be recycled, but in fact, the real part that can be recycled is limited. The external reserve fuel box cannot be used in secondary. Because it will fall in the sea, it is basically the same as scrap. On the one hand, there are too few recyclable parts, and on the other hand, the aerospace aircraft's own death weight is too large. The take -off weight of 109 tons of aerospace aircraft, the railway part reaches 68 tons. So in the final analysis, the reason why aerospace aircraft are eliminated is not because of two safety accidents, or because the launch cost is too high. Since the purpose of reducing the launch cost is not achieved, it will have no value for the spacecraft to continue serving. Become inevitable.

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