Tower Defense Strategy

The monsters made trouble in Country A inexplicably. The matter was not big and the loss was very small, but it left a lot of questions.

No one in the game has seen a similar monster, so this kind of ability is slightly stronger than the little monster, but far inferior to the object of the little monster. Is it a monster that is native to the earth ball?

The analysts analyzed a wave, without any conclusions, only a few possibilities were given, speculating that it was a new variety that was affected by spores, radiation, and hybridization.

Among them, the radiation impact may be the least, because no nuclear bombs have been dropped around the site of the incident, and the nearest place where Ca was hit by a wave of nuclear bombs has a straight line distance of 1,000 kilometers.

The other two opportunities are equal.

The sudden female monster is an episode in the monster crisis, but once again it is also a wake-up call to people who are seeking a way out from space.

However, despite the alarm bells ringing, productivity will not change significantly in the short term, and most things have to be done step by step.

After a period of construction of the moon table base, Homo sapiens robots have broken through the ice and began to grow vegetables.

After several days of observation of indoor planting, it was considered that the situation was good, and the screening of the first batch of lunar astronauts and the preparation of related spacecraft began.

The lunar base and the Kunpeng Space Station are not the same system. For the time being, they are still dominated by country C, and there are several foreign partners.

It is planned that the first group of members will be four people, and it is likely that there will be no second group of people for several months, so the personnel are still selected from traditional astronauts from several countries.

The spacecraft has also been changed and replaced with a new spacecraft, the Northern Star, which was jointly developed by C and R and used to adapt to the new electromagnetic orbit launcher of country R.

Country R’s launcher has a caliber of 4.1 meters, and the Northern Star has also shrunk a circle. When launched from the surface, it can accommodate up to six people. There is no internal cargo compartment and only a small rest area.

The Northern Star is mainly used as a supplement to Yinglong. After going to heaven, it will also be engaged in earth-moon orbital transportation, but it cannot be connected with too heavy cargo containers, mainly to transport people, food, snacks, and daily consumables.

Country C’s own spacecraft, Yinglong-3 is also undergoing final tests before assembly at this time, and will be ready earlier than the Northern Star, but this spacecraft will not take off in a short time.

Compared with the previous two ships, Yinglong 3 has a slightly smaller main body, and has been changed to all-electric propulsion!

Yes, this is the first time that all-plasma propulsion technology has been used on a spacecraft.

Although the alien octopus provided relevant information, but due to the material foundation, the thrust could not be increased. In the end, Yinglong 3 had to use a 0.1 kN thruster to make do with the four five-in-one main propulsion units. Thousand Newtons of thrust.

By comparison, when launching from the surface, the total thrust of a five-meter-diameter core stage, a first-stage engine plus a booster is close to 10,000 kN. The upper stage thrust of the previous chemical power can also reach more than sixty kilonewtons.

So can the main thrust of three thousand oxen fly?

Of course.

Taking the low-Earth orbit velocity as the relative velocity zero, as long as the thrust can overcome the slow deceleration caused by the impact of the rare gas particles, it can provide acceleration to the spacecraft. But because each transfer of the orbit requires a longer propulsion time, more effort is needed in the orbit control.

With a thrust of 3,000 N, it can provide an acceleration of less than 0.1 meters per second when the total weight of Yinglong 3 is more than 50 tons.

This number looks like ten separate spectra, and it has to be accelerated for ten hours to reach the escape speed.

But whether it is outrageous depends on the specific task.

Yinglong-3 is a spacecraft prepared for the Red Star automatic space station.

It takes about 4000 meters ΔV to reach the orbit of the Red Star from the Earth's low-Earth orbit. The existing propellers on the Earth's Earth want to send dozens of tons of automatic space stations to orbit the Red Star and launch the components for assembly in the future space station. At least nearly 100 tons of fuel.

Electric push is different, two tons are not used!

Abandoning the traditional fuel, the total thrust required when the weight is reduced is correspondingly reduced, and a large amount of ΔV can be obtained for free, not to mention that the thrust is now at the kilonew level, even a few hundred cattle is worth using.

In fact, the electric propulsion system used by the satellites currently in orbit does not have even a cow of thrust, and the only thing that can be done is to prevent the satellite from falling back into the atmosphere.

The electric thruster used by Yinglong-3 is an improved propulsion system used to adjust the attitude of the future space station. All materials are produced by the zero-gravity processing system of the future space station.

By changing the propulsion mechanism, Yinglong’s own ΔV is very huge. If the calculation of the entire aerospace system is correct, it will directly serve as the upper stage and complete the orbit. It can still retain about 20,000 msec ΔV. Of course, this is no cargo loaded. Momentum of time.

In addition, in order to have sufficient time to get into orbit and ensure that Yinglong-3 will not explode in the air or fall to the ground, its rocket parts must also be adjusted accordingly. It is also necessary to conduct several related launch experiments and collect data when launching cargo.

It is expected that the preparations for Yinglong-3 will be completed within two months, and the launch-ready state will be reached in about four months. At that time, the Red Star Automatic Orbital Station will also be assembled in the future space station and wait for the mission to start.

The reason why there will be an extra red star mission, I have to say, is still affected by the early obsession of mankind.

The red star is one of the first anomalous "stars" that human beings pay attention to. There are murals recorded in the era when the text has not formed. Several other planets with completely different trajectories from the real stars have similar treatment. Each of them has left a lot of myths. story.

As one of the many planets, the red star orbits the sun closest to the earth ball. Scientists speculate that it was once a beautiful blue planet. Unfortunately, due to its distance from the sun and its insufficient weight (gravity of about 0.3g), it will take a long time. It lost its magnetic field, and was then devastated by the solar wind, losing all the free hydrogen.

Even now, its temperature range is more friendly than that of several other planets. The carbon dioxide in the air can be used to provide low-cost and continuous oxygen.

Even without regard for feelings, as a planet with low gravity, Red Star has high value in the development of space industry.

For example, in the immigration pilot, if the Red Star can achieve internal sustainability without external supplies, even if the goal of mankind to expand the universe, it can increase by at least an order of magnitude; another example is the space elevator, the technical difficulty of building in Red Star is much lower than that of Earth Globe. , If even this is not built well, don't imagine areas that are more remote and more difficult to support materials.

In short, when all projects are entering a stable period and waiting for new equipment and equipment to be in place, it is reasonable to take care of the needs of Red Star development by the way.

The time comes to February, and the most important task this month is the expansion of the Kunpeng Space Station.

Yinglong-2 made several round trips. By early February, the construction of the low-gravity ring frame of the Kunpeng Space Station was completed, and the airtightness and small particle impact verification had been passed, and equipment was being filled inside.

The Kunpeng low-gravity area is mainly used for planting, but the power supply cannot keep up with full planting in a short period of time, and some areas will be temporarily used as living cabins.

At this time, you can start to prepare for the second batch of personnel to go up.

The preparation is divided into the ground and the sky. In the sky, the existing personnel of the Kunpeng Space Station will temporarily put aside their experiments and focus on plant seedling and cultivation.

The advantage of full artificial light planting is that the growth cycle is slightly shorter, and the next month's output can be estimated in a few days.

Ground preparations are still the launch plan.

As a dual-purpose vehicle used repeatedly in space, the Yinglong series is not suitable for sending people up from the surface. The cost is one aspect. The main reason is the high complexity of Yinglong, complexity and reliability. It is a mortal enemy. The higher the complexity, the more time-consuming various inspections will be, which is not conducive to high-frequency applications.

The reliability of the separate launch of the manned/escape capsule used in the 3.35-meter conventional rocket is good, but the cost of the traditional rocket itself is higher than that of the electromagnetic rocket, and it is still a disadvantage.

Therefore, country C changed a 3.35-meter silo, which was the first well used for road exploration.

Like the five-meter super well, the No. 1 well can also be used for both passenger and cargo after the transformation is completed. It will send the second batch of personnel to the Kunpeng Space Station.

Of course, Wu Mi Jing was not idle, but Wu Mi Jing involved more confidential technology and was not willing to use it to dock with the Kunpeng Space Station.

The conventional manned mission of Wumijing will be carried out by a new spacecraft model, the "Dragon Gate".

The gantry can be regarded as a simplified version of Yinglong with no transitional carrying capacity. The length is cut in half and can be used for re-entry into the atmosphere.

It will be the largest manned reentry device in human history ~www.wuxiaspot.com~!

Does it overlap with the function of the escape pod?

There is a difference. Because the gantry is large enough, the design has a certain degree of self-sustaining power. Food is not counted, and only oxygen and water cycles are considered. It can support eight people to stay in space for fifteen days.

In addition, it is equipped with a new type of canned food emergency system. This can is usually used as a space suit storage box. When necessary, it can be decompressed separately for out-of-cabin activities, such as recovering materials from the destroyed space station.

It can be said that the Dragon Gate is barely a space escape capsule, and the previous one is just a simple reentry device. If it leaves the atmospheric environment of the earth ball, it will become a delayed killing machine.

Longmen has another important task. It will bring two orbital thrusters and their corresponding built-in liquid fuel tanks back to the ground together, and they will have to be recycled and reused!

The built-in fuel tank has to be brought up because it is also an extra weight with the relevant pipeline. If it fails the test, it will be changed back to the normal return mode in the future, and all excess weight will be discarded before entering the pneumatic heating again.

Longmen’s first test shot was placed on February 10.