Galaxy Technology Empire

Next, Huang Junjie asked a crucial question: "Concerning the issue of astronaut human body overload, please share your opinions."

This issue is indeed very important. If the mass projector can only be used to transport goods, then the cost performance will be greatly reduced.

In principle, the mass projector is destined to be unfriendly to the human body. After all, the initial velocity is too fast, and the speed in the air suddenly reaches 16 times the speed of sound.

In the mass projection system designed by Galaxy Technology, in addition to the 500-meter superconducting guide rail at the bottom, the magnetic vacuum pipeline itself is also an electromagnetic acceleration track.

The overload of an astronaut or pilot is the acceleration. According to the calculation formula, we can know how much this overload is.

The basic formula of acceleration is [final velocity - initial velocity/time equals acceleration", there is also "average velocity/time = acceleration", the formula is a=V/t].

The concept of acceleration is “a physical quantity that describes how quickly an object changes speed.

Acceleration can be divided into positive and negative values. This is very important. When decelerating, acceleration is negative and when accelerating, it is positive.

In the case of increasing speed, when the direction of acceleration and velocity are the same, the object accelerates. According to the formula [Vt final velocity - Vo acceleration = the product of at acceleration and movement time is greater than 0, indicating that Vt is larger than Vo, so at is greater than 0].

Regardless of whether the acceleration increases or decreases, it is accelerated, and the displacement must increase.

In the case of deceleration, when the direction of acceleration is opposite to the speed, the object decelerates, and the formula is Vt-Vo=at.

The initial velocity of the mass projector in the air reaches about 5 kilometers per second (the instantaneous speed when it rushes out of the vacuum pipe), so in the vacuum pipe, this speed must be at least three times higher.

In other words, the speed of the projection spacecraft at 60 kilometers will reach an astonishing 15 kilometers per second.

According to the supercomputing results of the Electromagnetic Launch Research Institute, it only takes 120 seconds for the mass projector to reach 60 kilometers of the vacuum pipeline, and the acceleration during this process will reach 125G.

Even if the speed is reduced and the initial speed is suppressed to 12 kilometers per second, the acceleration still reaches 100G, which is difficult for the human body to accept.

So what is the maximum acceleration that the human body can accept?

Take the pilot load as an example. The pilot load is the acceleration that the pilot receives when the aircraft moves, that is, the overload. It is expressed in how many Gs it is, which is equivalent to how many gravitational accelerations it receives.

The overload experienced by the pilot is different from the overload experienced by the aircraft, but it is generally the same value. After all, the pilot is in the aircraft.

Pilot overload is divided into positive overload and negative overload, such as negative overload when diving and positive overload when climbing upward.

Fighter pilots have higher requirements for overload than other pilots, because fighter jets often have to perform maneuvers, which are all large overload maneuvers. Pilots are required to be able to withstand at least 8G overload, and preferably 9G.

In this way, only when you are wearing anti-gravity suits and are well prepared can you perform actions safely. This is also the reason why astronauts are selected from fighter pilots.

The human body's limit of 8 to 9G is also limited to a certain period of time. In case of instantaneous overload, the human body can withstand higher levels.

The acceleration that the human body can generally withstand is about 10G. For example, Gagarin, the first astronaut to enter outer space, withstood an overload of about 11G.

This is due to the backwardness of early aerospace equipment. The acceleration of early rockets was extremely high, and the overload often reached about 10G within thirty seconds after takeoff.

Due to the use of advanced computer control, modern launch vehicles have more rational motion trajectories. After liftoff, the acceleration is generally about 3G.

Overload has the greatest impact on the cardiovascular and circulatory systems.

The increasing acceleration during overload affects the pressure distribution in the body due to blood and other body fluids.

When the spacecraft rises rapidly, the blood in the human body will sink like the feet of an elevator, and the blood will quickly concentrate toward the lower part, causing the lower blood vessels to expand and put great pressure on the blood vessel walls, which in turn causes the liquid in the blood vessels to flow into the surrounding tissues. Penetration and leakage, causing swelling and pain in the lower limbs.

Concentration of blood to the lower part will also cause ischemia in the heart and head, resulting in decreased vision and slow reaction; in severe cases, even confusion may occur.

To avoid these consequences, astronauts wear anti-gravity suits that disrupt blood flow.

Overload can cause blood to flow to the lower parts of the body, and this device prevents excessive concentration of blood in the legs.

At the same time, allowing astronauts to adopt appropriate postures and use reclining seats can also reduce ischemia in the head and heart, thereby improving the astronauts' ability to withstand acceleration.

The problem is that even with the use of anti-gravity suits and reasonable postures, astronauts cannot withstand terrible overloads of up to 100 to 125G.

Although in 1954, a military doctor from Mi Li's family was driven by a rocket accelerator and withstood an overload of 46.2G in 1.4 seconds. The result was permanent damage to his vision.

Also from the Mi Li family, at the Indy 500 finals, a racer decelerated to an astonishing 214G when he hit the guardrail. This guy was lucky to survive and returned to the racing track 18 months later.

Although these examples all show that the human body is not as fragile as imagined, these examples can only be treated as special cases and cannot be regarded as universal.

If the overload of the projection spacecraft is as high as 100-125G, and an astronaut sits on it, there will only be one consequence, that is, the blood vessels will burst and the eyeballs will be squeezed out of the body, which is a certain death.

As for gambling the lives of astronauts on the unknown survival rate, Huang Junjie can't do it, and it's also not financially allowed.

"This problem is indeed very troublesome. After all, the advantage of the mass projector is its fast muzzle velocity. If the muzzle velocity is too slow, it will not be able to break through the Karman line, which is equivalent to invalidating martial arts." Academician Ma was also quite helpless.

Wang Guanghai also racked his brains and couldn't come up with a solution. He proposed a compromise plan:

"It seems that for the time being, mass projectors can only be used to transport supplies, and astronauts have gone to space through launch vehicles."

Chang Yanji, the head of the Life Research Institute, who had been here today to make soy sauce, couldn't help but have an idea when he heard this.

"Boss, maybe the vitamin supplement can solve this problem!"

"Vital fluid?" Huang Junjie was stunned for a moment, then realized:

"Vital Vitality Liquid! Yes! It's the Vitality Vitality Liquid. Why didn't I think of it?"

"What is the vitamin liquid that Mr. Huang is talking about?" Li Zhongting asked quickly.

"A thing that allows people to breathe in liquids. If people are immersed in it, it can function similar to how deep-sea fish survive in the deep sea." Huang Haojie explained.

Deep-sea fish can live in high-pressure environments because the water inside their bodies offsets the external pressure.

The physical nature of objects under water pressure in the deep sea is similar to that under high acceleration. Both are problems of deformation caused by pressure.

In the first half of the last century, it was proposed to use a liquid that humans can breathe freely to solve the pressure resistance problem of deep-sea diving, but it was not realized due to limitations of technical conditions.

It wasn't until 1966 that scientist Leland Clark discovered that mice that accidentally fell into a solution of fluorocarbon (difluorobutyltetrahydrofuran) could still survive.

It turns out that the dissolved oxygen capacity of this solution is particularly strong, about 20 times that of water, and mice can "breathe" freely in the solution.

Using this solution as a basis, scientists further invented artificial blood, which was clinically successful for the first time in 1979.

It can be said that this artificial blood fulfills part of the function of anti-stress fluid.