The last human in the universe

Chapter 53 Surprise
This speed is the highest speed that rockets propelled by chemical fuel can achieve at this stage.

In extreme cases, it is not impossible to achieve higher speeds—for example, increasing the number of missile stages, building a 4-stage or 5-stage missile, and increasing the fuel quality to account for more than 95% of the overall mass, but that will make the missile body lose Without sufficient stability, the frequency of various accidents will increase to an unacceptable level.

"We have enough evidence to prove that the missiles launched by the deep space civilization to our planet are also propelled by chemical fuel. Why can their missile speed reach such a high speed?"

The experts looked at each other.

This kind of thing is really bad.The most likely reason is that the deep space civilization with interstellar navigation capabilities in its heyday had a more optimized design of chemical fuel rockets.If this is the case, there is basically no possibility for humans to do this.

"impossible."

Faced with an expert's guess, Zhao Changxing smiled lightly and shook his head.

"This matter can't just be an economic account. You only considered the normal situation, not the extreme situation."

"We can create a launching platform-this platform also has the ability to propel itself. We first accelerate this platform to a speed of more than 10 kilometers per second, and then launch missiles on this platform. In this way, the two speeds superimpose , wouldn’t it be possible to obtain a speed exceeding 29.21 kilometers per second?”

This solution is obviously uneconomical.First of all, five missiles plus the self-weight of the launch platform will reach a terrifying level.How much fuel is needed to propel such a heavy system?
And, fuel also has its own weight.The more fuel, the greater its own weight, and the more fuel it needs.

It's a vicious circle.

If this plan is really to be implemented, the cost will also rise to a terrifying level.But just like Zhao Changxing said, on this issue, we can't just settle economic accounts.

It is of great significance to carry out a fruitful retaliatory action, while boosting one's own morale, to solve hidden dangers at one time, or to seriously slow down the opponent's recovery.

Do it no matter what the cost.

"I can conclude that the deep space civilization must also adopt this form to accelerate the speed of the missile to such a degree. Because this kind of solution is not very technical, and destroying us is too important for them .If they have a more optimized chemical fuel rocket design, then with this method, the final speed of the rocket attacking us, not to mention too high, can always break through our defense network? But the reality is, there is no. So, that's the approach they're bound to take."

Several experts showed thoughtful expressions on their faces.

"They work, and so do we. Go and try."

After proposing this idea, military experts immediately started actual verification.

In the blueprint, the total mass of this launch pad is as high as nearly [-] tons, not counting the five interstellar missiles.Among them, except for some necessary devices such as fuel tanks and engines, the rest are all fuel.

There are also marginal effects in this.That is to say, when the amount of fuel has accumulated to a certain limit, and a certain amount of fuel is added, the propulsion speed that can be increased will become smaller and smaller.On the contrary, the probability of self-failure that may be caused is increasing.

According to the mathematical formula, it is easy to calculate where the point that balances the propulsion speed and self-weight is.

When the final result was brought in front of Zhao Changxing, the expressions of the experts were a little ugly.

The reason is simple. Preliminary verification, model simulation, and calculations show that at this optimal point, the launch platform can only provide an initial velocity of 6 kilometers per second at most.Adding the speed of 19 kilometers per second that the interstellar missile itself can accelerate, the sum of the two is only 25 kilometers per second.

It is exactly equal to the maximum speed of those missiles launched by the deep space civilization to the Sedna star.

And at this speed, in Xiaoxi's model, the probability of a single missile breaking through the defense network of the deep space civilization planet is only 3.6%.The probability that at least one of the five missiles will break through is about 17%.

This probability is a bit too low, and it cannot meet Zhao Changxing's requirements.

No way, in the calculation of the model, the performance of the planetary defense network of the deep space civilization must exceed that of human beings.In comparison, missiles launched by humans must have a higher speed to break through.

Even if the marginal effect is ignored, fuel is piled up forcibly, and some unconventional means are used——in the initial stage of acceleration of the launch platform, sending several spacecrafts full of fuel to accelerate synchronously with it, providing it with a part of fuel as a supplement, At most, the initial speed can only be increased by 3 kilometers per second, reaching 28 kilometers per second.

At 28 kilometers per second, the probability of a single missile breaking through the defense network of deep space stars and planets is 8.2%.

Still too low.

There is a non-linear relationship between missile speed and the probability of breaking through the planetary defense network.After the speed exceeds a certain threshold, the probability will increase greatly.For example, if the speed can be increased to 29.12 kilometers per second, compared with the speed of 28 kilometers per second, it is only increased by 1.12 kilometers per second, and the probability of a single missile breaking through the defense network will immediately increase from 8.2% to 31. %.

"Is there any way to increase the speed again?"

Zhao Changxing looked at the military experts expectantly.But they all shook their heads silently.

"What about the ion thruster?"

"No way... With its acceleration efficiency, I'm afraid the missile will fly to the deep space star, and its speed has not broken through 5 kilometers per second..."

Zhao Changxing nodded.

He made up his mind.

If there is really no way to increase the speed, then you can only accept the reality.After all, no matter what, retaliatory action is imperative.

"Let's build the launch platform first."

Compared with the roller base and space dock, the construction of the launch platform is much easier.After all, it has no technical content. It only needs to do a good job in quality control to prevent the accumulation of too much fuel and self-explosion due to accidents.

Zhao Changxing was once again lost in thought.

There must be some way to provide the missile with a higher initial velocity... there must be...

"Leader, the groundbreaking ceremony for the No. [-] space elevator is about to begin. According to the arrangement, you need to go to the scene."

"it is good."

Zhao Changxing nodded, put on his spacesuit and arrived at the scene.

All machinery and equipment are now in place.After Zhao Changxing delivered a short encouraging speech, the foundation was officially dug.

The foundation of the space elevator needs to be dug very deep.Because it must play the task of fixing the ground end of the space elevator on the planet.If the foundation is not strong enough, it will be uprooted and fly directly into space under the pull of the counterweight on the space end.

Looking at the many busy equipment, and imagining that in the near future, there will be another bridge connecting the ground and space here, Zhao Changxing is full of emotion.

But at this moment, he suddenly remembered something, and his whole body froze suddenly.

"Space elevator, space...elevator?"

He suddenly got up.

Military industry experts once again came to the meeting room.

"I have an idea." Zhao Changxing looked solemn: "Can we carry out the launch mission of the launch platform at the counterweight end of the space elevator?"

The experts were a little dazed at first, but they reacted after a moment, and their eyes lit up.

"This, this... seems, seems to be really possible!"

The space elevator is built at the equator of Sedna.Sedna's rotation period is 10 hours and its radius is 500 kilometers.

Based on this calculation, the linear velocity of Sedna's equator is about 87 meters per second.

And no matter how long the space elevator is, it always keeps running synchronously with Sedna.Its end, the counterweight end, also has a rotation period of 10 hours.

The total length of No. 5500 space elevator is [-] kilometers.Its end is [-] kilometers away from the center of Sedna.

With the radius and time, the linear velocity of the counterweight end of the space elevator can be easily calculated.

The result is about 0.96 kilometers per second.

It should be noted that this number has already exceeded the escape velocity of Star Sedna.The reason why the end of the space elevator cannot escape is entirely because the space elevator itself pulls it.

So... If the launch platform can be launched at the end of the space elevator, doesn't it mean that at the beginning, when the launch platform has not been ignited and propelled, it has obtained an initial velocity of 0.96 kilometers per second out of thin air?

This is still under the condition that the total length of the space elevator is 5000 kilometers.If, if the space elevator can be extended by 5000 kilometers, the linear velocity at its end will be as high as 1.83 kilometers per second.

1.83 plus the previous 28, the total speed will be as high as 29.83 kilometers per second, and the probability of a single missile breaking through the defense network of deep space stars will increase to 34.6% in a straight line!The probability of at least one missile breakthrough among the five missiles will be as high as 88.1%!

This can fully meet Zhao Changxing's requirements, and even exceed it!

"No. [-] space elevator, don't build it yet. First take its carbon nanotube material and connect it to No. [-] space elevator, and extend No. [-] space elevator to [-] kilometers. After that, at its end, put Throw out the launch platform!"

"it is good!"

"and many more!"

Zhao Changxing stopped the excited military experts again.

"First of all, we need to wipe out the spy satellites of the deep space civilization that exist around us." Zhao Changxing said with a serious face, "Our plan must be kept secret as much as possible. The deep space civilization gave us a surprise, and of course we have to return them." It was a surprise."

"Yes!"

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(End of this chapter)