The fourth stage is the planning of outer space, which expands further when the previous stages are confirmed to be practical and does not have problems, and gradually strengthens and updates the fortresses that can enter outer space.

Zhang Xuesong replaced the holographic projection image with the original globe, which was slightly smaller than the previous one, with more moon orbiting around it.

Zheng Yingjie speculated without waiting for Zhang Xuesong to explain: "The fourth stage is migration to the moon?"

"Sort of, the initial stage of the fourth phase is mainly to strengthen the Sky Fortress, so that the Sky Fortress can ensure that the people inside can continue to live normally under the conditions of no oxygen and no gravity."

Zhang Xuesong added succinctly that if this plan can be realized, it will allow large aircraft to get rid of the constraints of the earth's unique environment and use deeper space as a survival platform, and the moon proposed by those space scientists in the past can be used here, and even build the moon into the largest shelter and defense base.

Everyone saw the vast space for development and the way out for the locals to confront the forces across time and space, but they also thought of more problems.

Yuan Jingxian first asked, "Have you ever thought about the shortcomings of your Sky Fortress?" It flies in the sky, and once it is attacked and falls, it will cause disaster, and our combat aircraft cannot guarantee its absolute safety. ”

"Didn't Major General Yuan say that the defensive cover, will there be such a thing on our Sky Fortress?" Zheng Yingjie said.

Zhang Xuesong nodded and replied, "Yes, it will be used as a defense system for the Sky Fortress."

"Wait." Yan Wen answered: "You just said that this thing was not developed, why is it there now?"

"There was no before, there is no now, there must be before the Sky Fortress lifts off, this kind of thing is similar to the power system of the Sky Fortress, it is the operation of the vacuum space, if the power system of the Sky Fortress can be created, the defensive cover will definitely be able to be developed, so as long as the Sky Fortress can be lifted into the air, there will definitely be a corresponding defensive cover as a security guarantee."

Yan Wen continued to ask, "Is it absolute defense?" Able to defend against any attack? ”

"Theoretically, it depends on the attack strength and operating load, as well as the energy supply, its defense will consume a lot of energy, if the continuous attack intensity is too high, the reserved energy will be exhausted, and it will lose its effect at that time."

Zhang Xuesong then added that the problem of energy is not a problem, after all, there is nuclear energy and strong space energy at this time, and what is needed is to make high-power energy output equipment.

Yuan Jingxian still felt that the security risks were too threatening, and used the existing aircraft carriers as an example to point out the trouble that aircraft carriers would have when they were attacked.

The larger the object, the more vulnerable it is to attack, even if it is protected by a defensive shield, but how to ensure that the equipment running the protective shield will not have problems, especially during high-intensity operation.

Will something go wrong and affect the safety of the entire Sky Fortress? And then there is the question of whether the enemy will infiltrate the inside of the fortress and wreak havoc.

If some important areas of the Sky Fortress fail, what problems will the entire Sky Fortress face, whether it will be completely paralyzed and cause it to fall.

There are not only soldiers on the Sky Fortress, but also the estimated 200,000 people, and even if one of the fortresses falls, it will not be a disaster that can be afforded.

Yuan Jingxian's question is not only raised from a security point of view, but also whether the public can accept such a seemingly dangerous fortress, which is of course important.

"Many years ago, when the train first came out, many people thought it was a beast that would kill people, and our Sky Fortress was the same, even though it seemed to be a lot of security risks and easy to attack, but in the development process, safety was the first consideration, making it safer than the current aircraft carriers that are like bomb magnets."

Zhang Xuesong put down the teaching stick and returned to his seat, drank some drinks to moisten his throat, and continued to explain the detailed arrangements.

First of all, a sufficient number of escape pods will be placed in the living area of the people, and if the worst happens to the Sky Fortress, the people can escape in an absolutely safe and reliable escape pod, so the fall of the fortress will not be as terrifying as imagined.

Then there are the materials and internal structure of the fortress, the light materials and the anti-life construction structure will ensure that the fortress is in a gliding state during the fall, and the energy and other pipelines are designed according to the roots of the plants, and the damage to the local important areas will not affect the whole, that is, there will be no so-called complete paralysis.

Yuan Jingxian asked: "What does the root of the plant mean, why does the damage to the important areas not affect the whole, and what about the important nodes?"

Zhang Xuesong used a computer to project the roots of a tree and explained: "This is the energy supply system of plants, which is different from our electromechanical energy supply, the current electronic machinery is an energy supply point to supply the energy consumption of all parts of the entire instrument, while plants have countless roots and branches, which can be used as a separate energy supply, even if a few roots are missing, it will not have too serious impact."

"Does it make any difference, the energy provided by those roots still ends up in a little bit."

"That's right." Zhang Xuesong explained in depth: "If the various facilities on the Sky Fortress are arranged like the roots of plants, it is simply like parallel connection on the circuit, there is more than one access point for each individual instrument, and the main lines are prepared into multiple lines, and multiple energy cores are placed together for mutual backup."

Yu Jianbang, who doesn't know much about science and technology, also understood the meaning and said: "Is there multiple sets of standby equipment waiting to be started at the same time, and there are separate operations in each area."

"That's probably it, and the specific design depends on the actual situation."

"Good guy, in the end, it's a local tyrant, and I don't think about the cost or anything." Yan Wen sighed.

Zhang Xuesong tapped the table with his left index finger and said: "Lao Yan, we are not designing disposable combat supplies, but a home for the people to live in for a long time.

It's not a matter of cost, but also about the future expedition to outer space, when the survivability of the fortress will be more tested, and more preparation will be less troublesome.

Yan Wen saw that the others were not familiar with Zhang Xuesong, so he was thinking about the question they wanted to ask, and then said: "The problem is that our current production capacity may not even be able to build a fortress."

"So this is the product of the third stage of development, with the technology and production capacity driven by the first two stages, the latter will be easier."

Yang Wanjun analyzed their conversation and said, "Major General Yuan, your plan may be a good direction for our locals to attack, but can the outbreak of war wait until that time?" (To be continued.) )