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

Chapter 1342 Yokosuka Express and Guam Express

This sentence was definitely Jing Zhiyuan's instinctive reaction to the shock.

Without any knowledge, just relying on intuition.

But I have to admit that my intuition is pretty accurate.

"Your judgment is correct. Based on the optimization range of this plan, it does have the potential to be transformed into a reusable aircraft..."

Chang Haonan could see that the other party had made some special preparations before coming, but they were not sufficient, so he was caught off guard.

In this situation, it is inevitable to feel a little embarrassed.

Therefore, he first calmly helped to hold Bo Zun, and then pointed to the curves below the concept map and continued to introduce:

"According to the wind tunnel test results, although the aerodynamic performance at specific design points is slightly inferior to the respective optimal designs, overall, when this configuration glides at a positive angle of attack of 0-10°, the lift-to-drag ratio can be maintained above 4.5 in the Mach number range of 10.5-3.2, so it is more adaptable to the needs of multi-mission and large envelope flight, and has significant advantages in the entire flight process range."

"In addition, for the sake of versatility and production efficiency, we also retained the variable fairing part of the original plan, that is, the upper surface design remains unchanged, and the lower surface, that is, the compression surface design, is changed to adapt to the performance requirements of different ranges."

Having said that, he clicked the mouse and turned the PPT to the next page.

The above is a design similar to the previous one, but it looks more full-bodied:
"After replacing the compression surface, the optimization range can be basically shifted to Mach 11.5-17.5, corresponding to the mission requirements of medium- and long-range missiles with a range of 5000 kilometers."

"In fact, we can also optimize higher ranges, but at this stage, even if an intercontinental missile uses a normal conical warhead, it can still fly above Mach 20, which is basically impossible to intercept. Considering the limitation of the first cosmic speed, it is difficult to further optimize it even if a waverider design is used. It can only improve the flexibility of the trajectory, but it will not significantly increase the probability of penetration. On the contrary, the irregular shape will reduce the carrying capacity of multiple warheads, so no relevant improvements have been made for the time being..."

"..."

Jing Zhiyuan didn't expect that his guess turned out to be correct.

Although the whole process did not involve any part related to "judgment", since Chang Haonan had paved the way for him, he was happy to go with the flow:
"That's what I was saying... these two sets of vertical stabilizers look like a small airplane."

Of course, he also knew that he couldn't continue to dwell on these technical details, otherwise he would be exposed sooner or later.

So, after a brief transition, the topic suddenly changed:
"But Academician Chang, this design... isn't its length a bit too exaggerated?"

He stretched out his hand to the big screen and measured the size of the aircraft:
"If it is installed in front of a ballistic missile and the fairing is added, the overall proportions may be..."

Jing Zhiyuan couldn't think of a word to describe this feeling for a moment, so he was stuck here.

But Chang Haonan definitely understood what he meant.

When the Dongfeng-26 missile first appeared in the past, the extremely exaggerated cone size of the launch tube attracted many people's attention.

The current plan is even longer because it is a waverider (the DF-26 is a double cone) and it also has an additional low-speed waverider band and a transition band in series.

For people of this era, it is normal to feel weird.

Chang Haonan switched to the big screen and displayed the long-prepared cross-section of the internal structure of the flying object:

"This solution is designed as a carrier. There is a separate space inside to accommodate the modular warhead. There is no need to add an additional fairing. It can be installed directly in front of the missile... In addition, because the gliding distance is long enough, the requirements for the missile itself are slightly lower, so the power part can be shortened appropriately..."

Because the specific power form has not yet been selected, there is no simulation diagram of the entire missile structure on the PPT.

Jing Zhiyuan probably imagined it in his head, but still felt that this design with a head-to-body ratio close to 1:1 was a bit weird.

But as long as the performance is good enough, it doesn’t matter if it’s a little weird.

He quickly turned his attention to something more important:
"The requirements for the missile itself are slightly lower... so can we continue to modify it based on the DF-21 missile body?"

As China's first relatively mature solid-fuel ballistic missile, the Dongfeng 21 is almost being exploited.

Whenever the Second Artillery Corps has any new ideas, they almost always pick them out and make some changes to them.

"It really won't work this time..."

Chang Haonan shook his head repeatedly:
"The one for medium and long range requires a higher second-stage separation speed, which the DF-21 itself certainly cannot achieve, unless it undergoes a major modification, but then it is no different from a new model." "As for the basic model for medium and short range, within a range of 2000 kilometers, although the DF-21 can meet the separation speed requirements, it is still a bit too complicated to use a two-stage rocket on such a model, and it has to go through the first and second stage separation in the middle, and the power section is a bit too long, which is not very convenient..."

"..."

In short, it’s just one sentence——

Let Dongfeng 21 go!
"The existing models will definitely not be able to meet the requirements..."

Jing Zhiyuan stood in front of the screen with his hands behind his back, thinking:
"At present, there is a single-stage solid-state missile with a range of about 1200 kilometers under development. It was originally intended to fill the range gap between the DF-11/15 and the DF-21. The progress is optimistic, but it has been delayed due to staffing issues and has not been put into service. We can take this opportunity to make it a regular product."

"As for the medium and long-range ones..."

China's solid rocket technology has only been developed in recent years, so although it is not subject to the restrictions of the INF Treaty, its model spectrum is still not rich enough.

In fact, you can tell it from the name.

Except for the early Dongfeng 1-5, the first digit of the Dongfeng series missile number is the rocket stage, and the second digit is the serial number under that stage.

In other words, the DF-21 is currently the only model that uses a two-stage rocket.

But it does not meet the requirements.

Although there were concepts and plans for newer products, they were limited by cost-effectiveness and none of them reached the formal research and development stage.

After hesitating for a moment, Jing Zhiyuan confirmed with Chang Haonan again:
"Academician Chang, can you estimate how many years it will take to implement these two designs?"

He had already made up his mind. If the time was longer than four years, he could start from scratch and specially develop a two-stage rocket to carry a second waverider warhead with a longer range.

"several years……"

Chang Haonan was confused for a moment:
"The first one, we will temporarily call it 'Yokosuka Express', and we will probably be able to produce a prototype in the first half of next year... a prototype bomb."

He almost blurted out the word "prototype" out of habit.

"The second type has a higher speed, so there are still some electromagnetic shielding and aerodynamic thermal management issues to be solved. The time may be delayed a little, but it is estimated to be about a year later..."

"..."

"..."

There was silence.

Jing Zhiyuan looked at the PPT on the screen, then looked at Chang Haonan next to him.

For a moment, I didn't know where to start.

In the end, perhaps because the atmosphere was a bit stiff, I chose the most radical angle:
"Ahem... Things like Yokosuka Express should only be discussed internally, but not made public... It doesn't fit the theme of peace and development of the times."

Chang Haonan nodded.

There was another moment of silence.

Although he said so, it was obvious that Jing Zhiyuan himself thought the name was good, as it was concise and to the point while also being very targeted.

So after about half a minute, I couldn't help but be curious:
"The second type... the medium and long-range type, what do you call it?"

God knows how much effort Chang Haonan put in to hold back his laughter. He maintained a serious face and replied:

"It's called... Guam Express."

(End of this chapter)