Tower Defense Strategy

"Tower Defense Strategy (!

After completing one test firing, Well No. 5 went into sorting, inspection, and preparing for the second round of test firing.

The rocket in the second round of test firing changed a little, and the name became Expedition One C.

The three models of A, B, and C are actually from the same rocket design team.

Type A is used to carry people, which is the original purpose of the No. 5 well design; Type B is used to transport important cargo. The precision of the equipment is too high, and it is often difficult to withstand the pulling of huge acceleration. Therefore, the maximum exit speed of Type B is only Slightly larger than Type A.

The Type C is intended to maximize the use of the power of the super electromagnetic orbit and send the heaviest possible payload to the orbit.

The length of Type C has increased from 30 meters of Type B to 35 meters, but the length of its load section has been shortened. With the upper stage propeller, it is only 14 meters.

The main chip for the second round of test shooting is a water tank, which contains 30 tons of water, the water tank, and contains two sets of reptile robot arm sub-assemblies, five Homo sapiens robots and their various tools and accessories, and a set of RCS. The cargo hold of the fuel redistribution system, the total weight of the test fired load, is close to fifty tons. This weight is even far away from the theoretical load limit of No. 5 Well!

Among them, the reptile manipulator is the equipment that the old space station already has. This thing can use the docking points reserved for each cabin section to crawl around the space station to help with docking, astronaut extravehicular work and other operations.

At this time, there are two sets of robotic arms on the future space station, but they only have basic functions. The new one is also equipped with additional branch robotic arms to help with subsequent processing operations.

The RCS fuel redistribution system is a new device specially developed for the future space station.

Due to the large number of extravehicular operations on the space station in the future, the original disposable RCS unit is a bit out of date. This set of equipment is to cooperate with some new RCS units to realize RCS refilling in the space station and reduce material consumption.

The redistribution system also represents an aerospace branch that is increasing investment. Reutilization and regeneration will not be carried out here.

The total load of the Expedition 1 and C reached twice that of the first test launch, and its own weight was 80 tons more. However, the speed of this thing out of the well was even faster than that of the C, close to Mach 3.

A completely superconducting electromagnetic launch silo is so overbearing. As long as there are enough electric tubes, the launch velocity is just a matter of data setting.

After exiting the well, Expedition One C advanced with 5% thrust. The speed did not increase but decreased. When it reached a height of 10,000 meters, the temperature of the outer wall was close to 300 degrees and stuck.

This is another research project aimed at maximizing the use of existing launch rules and further improving fuel efficiency.

Sanbaidu is a relatively special point in pneumatic heating. At a certain altitude, the speed is just enough to trigger the highest temperature that can be reached when pneumatic heating is triggered.

In this launch, the temperature of the outer wall will be controlled between 280 and 350 degrees to see if we can save the theoretical 6% of fuel.

The result is not bad. Although it did not reach the theoretical value, it did reach the second planned orbit during the first stage of separation, saving about 3% of the fuel compared to the previous plan.

The position of this orbit is higher than that during the test launch of Expedition No. 1 and B. The near point is 130 kilometers and the far point is 200 kilometers. If the altitude drops naturally, it will take several years for the first stage to fall back into the atmosphere.

From the perspective of space junk management, this launch plan is not very good, but if you try, there will always be something you can't take care of.

With this experience, the subsequent Type C can slightly reduce the proportion of the first stage, leaving the first stage on the same orbit as the Type B, falling back to the atmosphere within two or three months, and leaving more fuel for the upper stage. The reserves, and ultimately the excess fuel, can all be recovered by the future space station.

The two test shots were successful. Part of the generator set of the power supply network of the No. 5 silo was temporarily shut down, and the whole well entered a comprehensive overhaul, and the first manned simulation test was prepared.

On the other side, wells 123, according to the launch window, launch normal components in sequence.

Because of the rising orbit, the launch window has increased from more than 80 minutes before to hundreds of minutes. A slight increase in the window section is more conducive to continuous launching, and each launch section has more time for end docking adjustment.

Three days later, the power supply network of the No. 5 silo once again increased its power generation, preparing for a manned simulation test.

Perform a manned simulation first, or for the safety of the astronauts.

The spacecraft launched from Well 5 is a new type of manned spacecraft named Ying Long.

In the past, the manned spaceflight of country C used rockets with a diameter of 2.5 meters, the diameter of the load fairing was less than 3.35 meters, and the diameter of each section of the spacecraft body was less than three meters.

When launching using electromagnetic wells, the payload section can only be less than or equal to the diameter of the rocket's main body. Using a 5-meter silo to launch a three-meter-diameter payload is inevitably a huge waste.

Yinglong uses a geometrical column section with a similar octagonal cross section. Although in order to ensure that the structure does not deform under long-term internal and external pressure differences, it still uses a curved shell, but it is more like a spaceship in a science fiction film-except for solar panels. .

As mentioned earlier, the effective utilization rate of the internal space of the circular cross-section is relatively small, and the geometric configuration is adopted, and the configuration of the sandwich equipment and pipelines is more reasonable, which is beneficial to reduce the difficulty of maintenance.

But there is a major disadvantage. An object with a non-circular cross section will heat up faster if it reenters the atmosphere at the same speed!

Yes, when Ying Long was designing, he never thought of returning to the atmosphere again.

The subsequent escape and return capsules will all be launched from wells 1, 2 and 3 to automatically dock with the space station. Due to the single task, this kind of return capsule will be simpler and lower in cost, but it will be more safe. Unmanned tests have been completed before the space station is upgraded.

The total length of Yinglong is 11.6 meters, the diagonal length of the cross-section is 4.6 meters, and there are as many as twelve ascending seats (the launcher must lie down when launching from the ground), which means that it can send twelve people to the sky at a time!

In addition to the basic functions, the first version of Yinglong also has two side facing ports, which can accommodate two decompression chamber exit hatches equipped with spacesuit personnel, and a cargo hold close to forty cubic meters.

There are advanced features afterwards.

Ying Long is not actually a spacecraft built for the space station. After all, country C and the partner countries have several low-orbit spacecraft models. To develop a large spacecraft with repeated functions is a waste of resources.

Its short-term goal is to become a shuttle spacecraft developed and used on the moon, and subsequent models will target the red star and asteroid belts.

In order to meet the follow-up missions, Yinglong spacecraft has some extended functions, such as an anchor point for the reptile manipulator arm to be anchored; in addition, there is an additional fuel tank external system that can use the remaining fuel tanks for capturing asteroids. Part of it; it can even be retrofitted by simple modularization, with additional two or four thrusters previously used to capture asteroids.

Back to the test site.

In this test firing, eighty-five kilogram dummies were fixed on the twelve ascending seats. All of these dummies are sensors used to collect data throughout the test phase.

In addition, there is a week's rations, drinking water, and 30% of the fuel tank capacity.

In this state, Ying Longquan weighs 23 tons, which is slightly heavier than the core cabin of the old space station. It can be seen that the "average mass density" of the Yinglong spacecraft, which is five meters shorter than the stationary object in the core compartment, is very large, but this state is already the optimal solution under comprehensive consideration of various tasks.

During the subsequent launch process, the rocket engines at all levels did not reach the maximum thrust.

The maximum g-force measured by the sensor stayed at 4.5g, and lasted only three seconds in total, and the G-force was controlled below 3.99G in other time periods.

Small g-force means slow acceleration and stays in the atmosphere for a longer time. The ΔV loss caused by overall resistance and gravity is greater, and dozens of tons of fuel are wasted in it.

But controlling the g-force during the launching process is exactly the original purpose of the construction of Super Well 5. Through lower launching G-force, people with weaker physique can be sent into space, such as those national treasure-level academicians of the Chinese Academy of Sciences and the subsequent ones. Talents in professional fields.

The success of this test means that the No. 5 silo and Yinglong spacecraft can afford the task of transporting special talents.

However, the second Yinglong spacecraft will have to wait a month to complete the assembly and commissioning, so the space station members of this ship still have to go to the sky in the traditional way.

The Yinglong spacecraft for the test launch will still be docked with the future space station, and will be used as a one-time propulsion vehicle to the moon. Of course, if the situation is better then, the space system will not mind it flying a few more earth-moon transfers. track.

In order to reduce its own burden, country C has provided a batch of designated superconductors to the West Central Continent Community and country R to build manned electromagnetic orbital launchers.

Among them, the project in country R will be jointly undertaken by the construction company of country C and the number one infrastructure company in country R. In the West Central Continent, because the influence of Country A is still there, the negative publicity over the past few decades is also a problem. It can only make them toss slowly. It is initially estimated that the repairs within five years will be covered by God.

The engineering specifications will naturally follow the standards used by the future space station.

According to this set of standards, the load diameter is less than three meters, and the adaptability to various interfaces is relatively poor. At the beginning, country C did not build a 2.5-meter silo for this reason.

However, considering the cost of adjusting the entire aerospace industry chain, it is too huge, and the burden on the financially tight R country is too great. Therefore, the new silo built with Country R adopts one of their caliber standards, 4.1-meter core level.

In fact, the situation in country R was originally taken into consideration. The industrial department of country C recommended a core stage with a diameter of 3.5 meters. However, country R believes that this is the only opportunity to promote the upgrade of the aerospace industry in decades, and it is more difficult to choose rocket technology. The 4.1-meter core level.

This 4.1-meter core stage was the rocket used by country R to launch the core module of his space station, but that space station had fallen back into the atmosphere twenty years ago.

People from the Ministry of Foreign Affairs also raised an opinion on the establishment of an electromagnetic transmitter near the equator at Tz, but it was postponed after comprehensive consideration.

Tz does not pass through the equator. Ken, the neighbor to the north, is a trans-equatorial region. However, the humanized monster flooding area in Ken is too large. Even if these things are removed, the restoration of public facilities and power grids will take a lot of time without consideration.

Tz's advantage lies in its solid relationship with country C, and after decades of assistance and self-construction, it has already had a certain infrastructure foundation.

However, the development level of Tz is always a little bit worse. Electromagnetic transmitters are super electric tigers. The peak power consumption can exceed gigawatts (G watts). In a short period of time, they cannot afford such ridiculous additional power consumption. For peak shaving and other methods, how much power generation capacity still needs to be supplemented requires on-site inspections.

More importantly, Heizhou lacks the real-time positioning capability on the battlefield required for precision nuclear strikes. The huge investment in infrastructure may be destroyed at some point. Therefore, to build electromagnetic transmitters, Tz's military strength also needs to be improved. Floors.

These preparations are not available for the time being. For this round of manned missions, Xizhongzhou and country R will each provide a spacecraft, and country C will do the rest.

…It’s not that country C is strong, but the waste industry in West Central Continent is too weak to provide additional capacity to support more production and launch tasks.

The personnel in this round is the same as last time, mainly in the sequence of industrial systems and engineering institutes, but the number is smaller.

The problem of the number of people ~www.wuxiaspot.com~ is also due to country A's record of killing the black sheep.

Originally, country C considered the worst case, the black sheep’s pollution range is rapidly expanding. In that case, the original space station personnel will not only not come down, but will continue to cram people inside. Of course, it’s not necessary to think about long-term development. , The fewer people, the less supplies are consumed. In terms of work, most simple tasks can be handed over to Homo sapiens robots.

With the accumulated experience in the application of Homo sapiens robots, the members of country C in this round have become eight people plus seven Homo sapiens robots, including West Central Continent and country R, ​​as well as the eight astronauts left behind in the space station. Twenty-one people.

The number is small, but this round has deliberately increased the proportion of female astronauts. The male to female ratio is 13 to 8. The first human to give birth in space may be born in it. The conditions are not yet available, but it should not be. Too far away.

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