The military-industrial scientific research system of the academic master.

Chapter 1173: Conquer the World in One Hour
Chang Haonan paused for about a second to give the leaders a rough idea of ​​the appearance of the PPT.

Then he moved back to the microphone:
"The first type is the traditional waverider, which is also the theoretically optimized conceptual shape designed from the perspective of aerodynamic performance. It has the best lift-drag characteristics among all the schemes. Thanks to the foresight of predecessors such as Academician Qian, my country has accumulated quite a lot of research results in this configuration."

"However, the volume of the waverider is very small, and due to its special shape, the efficiency of using the internal space is also low. Considering the mission payload, we can only consider using rockets or ballistic missiles as external propulsion systems, giving it a high ballistic altitude and initial velocity to glide. However, there are insurmountable defects in using air as an oxidizer."

"As far as weapon applications are concerned, this type of configuration is bound to be large in size and can only be carried by a launch vehicle, a launch silo, or a ballistic missile nuclear submarine. The target characteristics during launch are difficult to hide, and there is a large range limit. Therefore, it is more suitable for medium- and long-range strategic strikes..."

Since everyone present here is our own people, Chang Haonan doesn't need to do anything fancy and can just directly bring up the strategic deterrence purpose.

However, this part of the content is still relatively conventional.

As he just said, the research on traditional waveriders in China is relatively mature, so relevant content was naturally mentioned in the previous reports from the Institute of Mechanics and China Aerospace Science and Industry Corporation.

It just may not be so blatant.

However, Chang Haonan's last words before turning the page still touched everyone's heart:

"For example, if the DF-31 missile is equipped with a traditional waverider-shaped gliding warhead, it can become a full-fledged intercontinental ballistic missile and cover most of the key locations in North America..."

Some of the leaders' eyes were shining.

As a national weapon that was only tested before the 99 military parade, the status of the DF-31 is indeed somewhat embarrassing.

In terms of range, it just barely touches the standard edge of intercontinental missiles, which not only limits its actual combat value, but also directly reveals its secrets to others, greatly reducing its deterrent value.

Although the extended-range Dongfeng 31A is nearing the end of its development, it is hard to say that it can be repaired.

This caused great embarrassment for the Second Artillery Corps' 31xx Brigade, which was equipped with the basic model of Dongfeng 8.

China Aerospace Science and Industry Corporation even considered learning from the experience of the Russians next door and using the Dongfeng 31 as a carrier rocket.

Although it is indeed a solution, it is a bit regrettable anyway.

And it's humiliating.

But if it could be brought back to life by replacing the warhead, that would be a completely different matter.

Instead, it demonstrated our extremely high tolerance rate to the imaginary enemy.

Looking at the reactions of the audience below, Chang Haonan knew that the purpose of writing that report had probably been more than half achieved.

But now is not the time to be happy, so he calmed down and continued:

"The second type is the traditional wing-body combination model."

"The aerodynamic layout of the combined body has a traditional fuselage, so the internal space is used very efficiently. The aerodynamic design technology has the foundation and experience of traditional design ideas, but its design must be carried out completely in a three-dimensional sense. Its shock wave system is very complex, and the cost of research and development and manufacturing is very high. Academician Qian rejected my country's space shuttle program for this reason..."

"The third type is the lifting body aerodynamic layout. Its characteristics are similar to those of the wing-body combination, but its shape is completely incompatible with the use of air as an oxidizer. It must be launched using a carrier rocket..."

"After obtaining more advanced thermal response and thermal protection technologies in the future, the above two configurations can be considered for use in space shuttles and other aviation/spacecraft for round-trip transportation between the earth and the sky, or as weapon launch platforms. However, due to their high costs, they are not suitable for use as disposable ammunition themselves..."

Chang Haonan originally planned to quickly go through these two parts which were not the focus of today.

But one of the two leaders in the middle was clearly interested.

He even raised his hand while writing it down in his notebook.

It's so funny. The leader raised his hand, but of course that can't be taken as a request.

So Chang Haonan was really flattered and quickly stopped turning the page.

"Comrade Haonan, you just mentioned the issue of thermal response and thermal protection. It just so happens that the previous report on manned space flight engineering mentioned that the thermal protection of the spacecraft's return capsule, including the thermal protection of the US space shuttle, is one-time and can only take effect in the short time after re-entering the atmosphere."

The other party raised his head and said in a kind tone:

“If the hypersonic vehicle you are talking about needs to fly within the atmosphere for a long time, is there a relatively mature, or at least confirmed, effective technology to protect the vehicle itself?”

There was actually some related content in Chang Haonan's original plan, which even involved the analysis methods of structural temperature field and stress field, but it was deleted later considering the audience's acceptance.

Now that someone asked, he summed it up:
"In terms of appearance, the waverider does have sharp edges, and the aerodynamic thermal peak is more severe than that of the blunt body. However, the nozzle can be set at the symmetrical center of the front end of the flying body. When the total pressure ratio of the jet to the mainstream reaches 0.35 or higher, it can interfere with or even isolate the mainstream flow field, achieving a better thermal protection effect." "Of course, more specific research still needs to rely on large-scale hypersonic wind tunnels and actual test flights for verification..."

The chief lowered his head and wrote a few words on the notebook, and at the same time stretched out his hand slightly to signal:

"Okay, please continue."

Chang Haonan:
"Ok."

Well behaved.jpg
Then continue turning the pages.

"The next fourth type of configuration is relatively simple, similar to the traditional slender aircraft fuselage. If a rocket engine is used, it is an axisymmetric cone or a double cone. If an air-breathing engine is used, it can be like a fighter jet with head intake, using the Mach cone to reduce wave resistance and provide inlet intake conditions for the engine."

"This design is not difficult, the control system is simple, and the manufacturing cost is low. Although the internal space utilization is limited, it is still better than the traditional waverider. The disadvantage is that the lift-drag is relatively low, so the speed potential is limited and it is difficult to reach more than 7 times the speed of sound. Therefore, it can be considered for early models of hypersonic weapons, carried by ballistic missiles or high-altitude, high-speed aircraft, to shorten the transfer time of enemy targets."

Chang Haonan simply did not discuss the interception.

Judging from the experience of the previous life, China’s hypothetical enemies in the foreseeable future basically do not have the ability to intercept hypersonic weapons within the atmosphere.

Hearing this, Qiao Chenqing paused for a moment, seeming to be somewhat interested.

After all, Chang Haonan mentioned "carried by a super-high-speed aircraft."

Therefore, in the view of the former, this is obviously the most effective weapon that the Air Force can obtain when it is temporarily unable to involve nuclear weapons.

However, he looked at the situation around him and finally did not speak.

It was at this time that Chang Haonan paused for a moment, took a deep breath, and entered the most important part of his entire report.

"This is the last type, and it is also the configuration that my research group is focusing on."

As he clicked the mouse again, a three-dimensional rendering with a shape similar to a shark's mouth and full of momentum appeared on the screen.

"A two-dimensional hypersonic vehicle based on the concept of waverider layout, referred to as a waverider-like vehicle."

This somewhat difficult-to-pronounce name took the bigwigs a while to digest.

Fortunately, the phrase structure is clear and not difficult to understand.

"This type of aircraft retains the advantages of a waverider. Its shape has a sharp leading edge like a waverider, so it has smaller wave drag and higher lift-to-drag ratio. It also has the advantage of a larger volume ratio of the wing-body combination layout, which can relatively easily accommodate autonomous power and mission payload at the same time."

"More importantly, the two-dimensional features of this type of aerodynamic shape can easily construct a forebody shock wave system, which fully meets the intake conditions of the scramjet propulsion system. It only needs to use a limited rocket booster to provide an initial speed of about five times the speed of sound, so that it can fly normally in the atmosphere like an ordinary cruise missile. If a dual-mode scramjet engine is used, then this initial speed can be reduced to about three times the speed of sound..."

"At the same time, thanks to the powerful forebody shock wave and lift-to-drag ratio, the maximum speed potential of this configuration can reach 12-15 times the speed of sound, which is roughly equivalent to 4-5km/s, or about 16200km/h..."

Chang Haonan marked several numbers on the PPT in bold black font.

But even so, for most people, this speed is still too terrifying to form an intuitive concept.

However, he also has a good idea -

The next page of PPT is a complete world map.

It's just that, with Beijing as the center, a circle with a radius of 16200 km was drawn...

Except for Brazil, Chile and parts of Antarctica, almost the entire land area of ​​the Earth is included.

Chang Haonan swore that the moment this picture appeared, he heard more than one gasp.

But he still used his greatest willpower to resist the temptation to "look back".

Instead, he walked directly to the curtain and pointed to the edge of the circle on the map:
"As an intra-atmospheric vehicle, this weapon does not need to consider the ballistic ascent phase."

"That means it can hit almost any location on Earth within an hour of launch!"

(End of this chapter)