I Have a Little Black Hole

2020! Fresh start! I wish you all a Happy New Year! A lot of luck! Happy every day! ! !

Why does this thing look so similar to the designs in those sci-fi movies? Lei Tiantang couldn't help laughing and complaining when he saw the combination after adding the solar sail.

Haha! Don't say it, boss, this design is really borrowed from science fiction movies! If we install the solar sail according to our design, the flying speed of the combination will be about doubled, allowing Save even more time with our deep space exploration program!

After all, the diameter of our final planned solar sail can reach the figure of 300 meters! Zhang Hanxiu pointed to the design drawing and introduced.

This is well understood, we all know that light is made of photons that have no static mass but have momentum. When a photon hits a smooth surface, it can change its direction of motion like a ping-pong ball bouncing off a wall, And give the impacting object a corresponding force.

The thrust generated by a single photon is extremely small. At the distance from the earth to the sun, the thrust generated by light on a square meter of sail is only 0.9 dynes, which is less than the weight of an ant.

Therefore, in order to maximize acceleration from sunlight, solar sails must be built very large and light, with a very smooth surface.

If the diameter of the solar sail is increased to 300 meters, its area is 70,686 square meters, and the thrust obtained by the light pressure is 0.034 tons.

The thrust may seem small, but thanks to the endless energy provided by the light from the sun, a spacecraft with a large solar sail could eventually travel at a speed of 240,000 kilometers per hour. That's four to six times faster than today's fastest rocket-propelled spacecraft. That is, 6 times faster than the speed of the second universe, and 4 times faster than the speed of the third universe.

It is not difficult to understand this. Because the spacecraft running in space is in a weightless state and has no air resistance, as long as a little force is added, the direction and speed of motion will be changed.

This is similar to the working principle of the ion engine used in the combination. It seems that the thrust is small, but as long as the acceleration time is long enough, the flight speed will be faster and faster!

It seems very troublesome to design the directional control and other operations when the combination is flying? And how to solve the problem of the weight of this solar sail?

After seeing the projection of the solar sail-mounted assembly projected by Origin, Lei Tiantang always felt that such a design was a bit strange, because compared with this huge solar sail, the volume of the assembly itself was very slim. This makes it cumbersome to control the combination of them all.

And no matter how thin the solar sail itself is, it still has weight. If the thrust generated by it is offset a lot by its own weight, then such a design will not be worth the loss, because such a big man wants to fly at high speed. It's really not an easy thing to control.

As for the control issue, we have done a lot of design to ensure the fine control of the solar sail after it is fully unfolded. Anyway, this design is also to launch a combination away from the sun, like the Mercury and Venus probes we are still designing. There is no such design.

If you fly in the direction of the sun generally, the angle adjustment of the solar sail is relatively easy to solve. We have verified this aspect in the simulation system.

As for the weight of the solar sail, because of the use of the latest graphene composite material from the material company, the solar sail with a diameter of 300 meters and its 8 brackets can add up to only 25 kilograms. The acceleration brought by the combined body, its own weight is completely negligible. Zhang Hanxiu explained after zooming in on the details of the solar sail's projection.

But how do you ensure that the combination can carry so many detectors for a safe flight? If there is an accident during the flight, the loss will be huge!

Lei Tiantang is still not very optimistic about this design. There are so many detectors on one assembly.

Looking at the simulation picture on this combination, a total of 40 detectors of different types are equipped, and the smallest of these detectors is 15 tons.

Even if they are only combined by rockets to the earth's transfer orbit, using the company's largest launch load, the Giant God 2 heavy-duty recoverable rocket, can launch at most 2 probes at a time.

Add in the combo stand, 4 ion motors, solar sail, two rocket boosters, and its refueling, and together it takes about 30 launches just to launch them!

Even if the company's current launch cost has dropped to about $5 million per launch, the launch cost will reach about $200 million. After all, even recyclable rockets have losses, and these costs have to be added.

And the cost of manufacturing these detectors and ion engines is more than 500 million US dollars. This is because most of the things are made by the company itself, and the manufacturing cost is so much!

700 million US dollars does not seem like a lot to the Infinite Gravity Group, but if the time cost is added, the loss is unpredictable. After all, it takes at least half a year to launch 30 launches and combine them. Time, after all, is not to say that these things are launched into the earth's transfer orbit and it is all over.

Relevant testing work needs to be confirmed again and again. It is good if problems can be found at home, but it will be troublesome if problems are found after the release starts.

After all, there are many places that may go wrong during the flight. As long as there is a problem, it might even cause all the probe launch missions to fail.

No matter how rich the company is, it cannot accept the launch failure of so many detectors. The waste of manufacturing cost and launch cost has nothing to do with it, but at least half a year's delay can cause problems in the company's space program. This was unacceptable to Lei Tiantang, so he specifically asked this question.

Of course, we have considered this aspect of the problem. The problem you are worried about may indeed happen, boss. Even if we do more tests and inspections, we will not be able to encounter the dangerous situations that may be encountered during the flight of the combination. 100% expected.

But boss, you forgot that our detectors are also capable of flying. If there is an accident during the flight of the combination, then these detectors can be directly separated from the combination according to the predetermined program, and then they You can use your own ion engine to adjust the orbit and continue the flight operation!

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