Take the Red Police to Marvel

The direct construction cost of a project can be roughly divided into material cost, labor cost, mechanical cost, scientific research cost and miscellaneous items.

For space elevators, labor costs and miscellaneous items are only the smallest part, followed by scientific research, machinery and materials.

Let’s talk about the material first. Since the yield pressure at the cross-section of the height of the synchronous orbit space station is always greater than the gravity generated by the total mass of the lower part, the higher the material strength, the thinner the elevator can be made, and the lower the material strength, the cross-sectional area will increase. increase sharply in height.

Yield strength refers to the minimum length required when one end of a rigid body hangs freely under the condition of a gravitational acceleration, and the other end is fixed by its own gravity.

The calculation formula of the yield length is l=p/pg (p is the yield pressure of the material, p is the material density, and g is the acceleration of gravity)

Assuming that the yield length of the material is l and the track height is h, then the required number of sections n must be greater than h/l. Assuming that the cross section of the previous section is p times the cross section of the next section, the larger n is, the smaller p can be made, and the balance between p and n is A minimal solution requiring total material can be obtained.

For common steel, its yield strength is about 5000 meters, and 3.6 kilometers requires almost 1 sections. The first section is 3 kilometers and the second section is also 3 kilometers. If only one steel wire is used, the second section will If it is pulled off, if two sections are used, the second section will have an extra load.

也就是（5-2）*2=4km，减去第一根3千米的重量第二段还可以载重1km的钢丝重量。

第三根用n根3km的钢丝，则n*5-3*3-3*n=2n-9＞0，n最少要5根才可负载1km的钢丝自重。

By analogy, the number of steel wires required for each section is almost doubled, and then turned over [-] times, so this is the reason why steel wires cannot be used as cables.

So what about swapping steel wire for carbon fiber?The tensile strength of carbon fiber is almost 3.5gpa, the density is 530kg/m577, and the yield length is about [-]km.

3.6万公里就需要53段，加上负载就要100段，设每段360km那么每根剩余负载算210km，第一段360km有效负载210km自重，第二段两根360km负载420km，减去第一段360有效负载就只有60km了。

第三段就要6根，210km*6-3*360=180km，以此类推最后一段就需要1.5^180根，这依旧是一个很巨大的数字。

The carbon nanofibers currently mass-produced by the alliance have a tensile strength of 101.5gpa, 29 times that of carbon fibers, and a yield strength of up to 16000 kilometers.

36000/16000=2.25, considering that the safe material load needs about 7 sections, this is only the cost of a cable to the synchronous track.

The cable also needs to be loaded with superconducting cables, and the power system, protection system and control system load need to be considered, plus the weight required for transportation may actually need to be doubled.

Calculating from the materials required for a complete space elevator track, it will require over one trillion euros. What is this concept?

At the same time, the annual GDP of the United States was only one trillion US dollars, and one track required the alliance's annual GDP, but to be honest, all the GDP that should be allocated has been allocated.

It is impossible to allocate all of them to space elevators, which means that the alliance can only spend up to 20% of its gdp on building space elevators.

In this way, the construction cycle and cost will increase again, which makes Rhine have to consider whether to modify the construction method of the space elevator.

Big head, very big head.

Rhine, who had just returned to the combat command room, closed her eyes and paused thinking about this aspect. She seemed to understand why Gu Yi chose to resign.

Think about it, all her colleagues in the past died with the passage of time, and she was the only one who had to continue to guard the earth because of the responsibility on her shoulders.

The pressure of fighting against foreign enemies and the disgust of stealing (robbing) Dormammu's energy, and the constant sadness of seeing relatives and friends made her choose to resign and die after seeing the talented Strange.

With a long sigh, Rhine shook his head and threw out the miscellaneous thoughts to rebuild the plan.

At present, the biggest oil bottle is the space elevator. If the alliance wants to build this thing alone, it will be a waste of money. Therefore, on the one hand, it needs to redesign the plan to save costs, and on the other hand, it needs to increase investment from other countries.

The first is the space elevator track. Originally, this thing was to build eight tracks in one step. Now it seems that the eight-in-one track will be changed into one large track. First build one and then slowly expand.

Then there is the construction of the space station. If a rocket is launched to build a space station in synchronous orbit, the alliance will not be able to complete it in the next century. A more efficient delivery method must be considered without exposing the fusion reactor.

space shuttle?Not impossible, for her who has a miniature fusion reactor, there is no problem in building a space shuttle with super-power electric propulsion.

In terms of carrying efficiency, the space shuttle manufactured in this way is also very efficient, and it only needs to consume a small amount of working fluid each time to realize the round trip, but the problem is that doing so will lead to the abort of the plan to hit the US auto manufacturing industry.

Because the United States and the Soviet Union both have space shuttles, the performance of their space shuttles needless to say, but they certainly cannot send materials back and forth to the sky four times a week.

How else can materials be sent to space?

Speed, power push...

There is a way!

Why not use cannons to launch materials from the surface into space if the speed is high enough to escape the gravity of the earth and enter a synchronous orbit?

A large number of capacitors are buried underground, combined with superconducting lines and high-energy microwave phase radar arrays. Even if the fusion reactor is not exposed, building a few more nuclear power plants to charge the earth cannon can still achieve the task of launching shells from the surface to space.

Just about to conceive this project in detail, Rhine's face collapsed again when he thought of the alliance's current financial situation.

The solution is feasible, but the alliance doesn't have that much money to build mass launchers.

Clutching his forehead in distress, Rhine felt that he had fallen into an endless loop.

In fact, if only in terms of construction, she has enough technology to release a large number of automatic robots for construction, after the Polaris is built, no one is needed for the whole process.

But what impact would that have on society?

You must know that Europe is a place with a shortage of human resources. It didn't take long for people to adapt to the status of manufacturing workers, and there were a large number of machines that could replace them.

The saying that millions of waterworkers have food and clothing is not a joke. The manufacturing and construction industries that were originally in short supply of labor will instantly have no shortage of people, but workers without other skills will be quickly eliminated and enter a state of unemployment.

The unemployed have nothing to do but work as hawkers or look for lower-level labor to get paid, but the service industry has not yet emerged and cannot provide enough employment at all.

As for being a hawker.

To be honest, sending the unemployed to set up street stalls is an expression of extreme incompetence by the government, because it can only happen when the following conditions are met.

1. The government is reluctant to provide public sector jobs to the unemployed

2. The government deliberately maintains high-intensity competition, and the result is that while creating a large number of unemployed people, it also creates extreme pressure on other workers. The government is willing to let some workers die of exhaustion in factories and offices, and let another group of people Starving to death on the street is not willing to control the market by sacrificing their own interests.

Therefore, Rhine is unwilling to do this. Although the above two alliances are absent, the result is the same, that is, a large number of people are unemployed without protection and cause social unrest.

Society cannot adapt to the changes brought about by ultra-high-speed technology in a short period of time, leading to a series of problems. There is only one way to change this.

That is to wait for the market to slowly expand and develop, gradually introduce advanced technology and expand new employment channels, such as allowing the developing service industry to absorb manufacturing workers, creating more demand to provide orders for low-end factories to create jobs.

This is also the positive cycle of construction economy that the aforementioned space elevator will create, and it is also the process from super money-losing goods to money-losing goods and then to balance of payments.

But there is still no money, and there is still no way to get a huge amount of money in a short period of time. In the eyes of Rhine, the 15 billion income in half a year can't do anything at all.

It seems that the only way to go is to borrow money.