Siheyuan: Starting from a fitter

Chapter 236 Developing Rocket Engines (Continued [-])

Current rocket heads are all semicircular or elliptical. The round head design is to improve its high-speed flight performance, strike accuracy and power.At the same time, it also has the characteristics of economy, easy manufacturing and high reliability, so it has become the shape of choice for modern weapons.

But if you want to increase the range, you can only increase the fuel carrying capacity, which will lead to thickening and lengthening. Such rockets are almost the same as missiles.

Therefore, it is already very difficult to further significantly increase the thrust.Later generations used multi-stage engines with a range of nearly 500 kilometers.Then there is the increase, which can only change the shape of the rocket.

Li Guocheng thought of the famous "Qian Xuesen Ballistic". The missile enters the atmosphere and uses the thickness of the atmosphere to rebound like falling leaves. Therefore, its trajectory is difficult to be locked by current radar computers.

Because it is as maneuverable as an airplane in the air, it can dodge left and right, jump up and down.

From the end of the 20th century to the beginning of the 21st century, Damao, Huaxia, and SAM conducted relevant experiments and launched their own missiles in the 21st century.

China's Dongfeng Express-17 is flat in shape and will be rebounded by the thickness of the atmosphere at the bottom. This is the famous waverider design idea.

A waverider is an approximately flat wedge-shaped or cone-shaped aircraft. At supersonic or hypersonic speeds, the inclined leading edge plane of this configuration will coincide with the upper surface of the shock wave.

At this time, the aircraft is like a speedboat riding on the surface of the water wave. It can convert the pressure energy of the shock wave into lift energy, and this lift energy is also very strong. It can not only make the wave rider glide over long distances, but even hit stones like stones. Like water drift, the range of the aircraft can be increased without losing altitude.

Therefore, in the supersonic or hypersonic state, the waverider aircraft will not only be endowed with strong maneuverability, but also have a greatly extended range.

The range-extending effect of the waverider is reflected in the Dongfeng Express 17. The Dongfeng Express 17 is developed on the basis of the Dongfeng Express 16, which is a short-range ballistic missile using a single-stage solid rocket motor. , with a range of 1500 kilometers.

东风快递17只不过在东风快递16的火箭发动机的上面加了一级乘波体弹头。但就因为这个小小的改动，东风快递17的射程就一下子增加到了1800-2500公里，增幅达60%之多。

If the upgrade measures from Dongfeng Express 16 to Dongfeng Express 17 are used on rockets, how much will the range increase?The new rocket does not require large overload maneuvers and only pursues gliding range extension. The short wings of the Dongfeng Express 17 waverider warhead can be removed to reduce drag. Therefore, the range extension of the waverider version of the rocket can be further improved.

All in all, after replacing the waverider warhead, the range of the rocket can be increased by at least 70%, that is, the range can be increased from 8.5 kilometers to about 15 kilometers!

More importantly, with the use of waverider warheads, the diameter of long-range rockets can be made smaller at the same range. For the same vehicle, the carrying capacity of rockets can be increased by 50% or even doubled, and the firepower density will increase. New level.

Coupled with the previous inertial navigation, who can resist the long-range fire salvo at this time!
The more Li Guocheng thought about it, the more excited he became, but he soon calmed down.In fact, the most direct way to determine the range of a rocket is to increase the caliber and fuel tank.

At present, Li Guocheng's improvements only refer to the structure of Sam's anti-submarine rocket, modifying the ignition and nozzle structure of the engine, increasing the range by 120% to 150%.

If the shape is changed to a waverider, and 50% to 100% is added, then whether it is used on rockets or missiles, it will increase by 3.3 to 5 times based on the existing technology.

This means that the current range of 8.5 kilometers can be increased to 28 kilometers to 42 kilometers.

If the caliber is increased, it is not an extravagant hope to achieve a range of more than 100 kilometers with the current ammunition ratio.Don’t forget that the maximum range of later Defender series rockets is said to be 480 kilometers.

At the 2015 Abu Dhabi International Defense Exhibition, my country unveiled a brand-new rocket launcher AR3. The ammunition calibers are divided into three types: 300 mm, 370 mm and 750 mm, which can be used according to different combat environments.

The range can extend from the short-range 70 kilometers to the long-range 600 kilometers, which is far beyond the farthest strike range of the rocket launcher. It is comparable to some conventional short- and medium-range tactical missiles and is the longest-range land combat rocket launcher currently in service.

Now that he has an idea, the next step is to continuously improve and simulate. In this way, apart from eating, Li Guocheng locked himself in the laboratory and entered into ascetic research.

Chen Li has long been accustomed to this habit of his and helps him turn down most of his social activities.If she had to participate, she would take Chen Yuhe or Ma Yong with her.

Slowly, Chen Li's image as the first sister of Longhua has been deeply rooted in the hearts of the people. If she didn't have a big belly, she would have already attracted the pursuit of some young masters.

When asked about the child's father, he always smiles and says nothing.Even if I heard some malicious speculations, I didn't clarify them, I just endured them silently.

"Sister Chen, why don't you disclose your relationship with the chairman?"

"Yuhe, you don't understand."

"I really don't understand you guys. We are obviously very much in love, but we don't get married or make it public. If I were you, I would definitely not be able to bear those rumors."

Chen Li smiled and continued to act stupid. She didn't feel wronged. None of this mattered to her, because she knew that he had her in his heart, and that was enough.

She also often secretly laments that it would be great if the time now was 1970. At that time, the law in Hong Kong allowed polygamy.

"Mr. Chen, we're here." Today is a bidding for a piece of land in Kowloon worth HK$5000, and the opponents are relatively strong.

In the real estate bidding conference room, representatives of major real estate developers and General Manager Chen Li, the representative of Longhua Technology, participated.

The host announced that the bidding activity has officially begun.

Mr. Li (Cheung Kong Holdings): Our plan can promote the harmonious social development of the region.

Ms. Wang (another representative of a real estate agent): Our company has accumulated many years of experience in this city, so we can better understand the needs of our customers and stay close to the market!
Chen Li: Sorry, I'm a little worried.We are a technology innovation company. We have never been to this kind of competition, so we may not be very clear about the models and rules.But we understand business development and operations very well.So I hope we can delay a little while and let us put together the perfect bid.

Other real estate developers also disagreed.

Chen Li: Okay.So please continue to raise it first.I will listen carefully to every idea, and when formulating the plan, we will naturally plan our headquarters building construction plan according to market demand.

Other representatives immediately spoke out to state their plans and opinions.

When it was Chen Li's turn to take the stage, she seemed confident.

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(End of this chapter)