Chapter 1342 Yokosuka Express and Guam Express
This sentence is definitely Jing Zhiyuan's instinctive reaction when shocked.
No little knowledge, it all depends on one intuition.
But it must be admitted that the intuition is accurate. "Your judgment is correct. In terms of the optimization range of this solution, it has the potential to transform into a reusable aircraft..."
Chang Haonan could see that the other party was specially prepared before coming, but it was not sufficient, so he was caught off guard by himself.
In this case, it is inevitable that I feel a little embarrassed.
So he helped Bozun calmly first, then pointed to the curves below the concept map and continued to introduce:
"According to the wind tunnel test results, although specific The aerodynamic performance at the design point is slightly inferior to the respective optimized designs, but overall, when this configuration is used for gliding at a positive attack angle of 0-10°, the lift-resistance ratio is in the range of Mach number 4.5-10.5. All can maintain above 3.2, so it can better adapt to the needs of multi-task and large-line flights, and has significant advantages within the entire flight process. "
"In addition, for the sake of versatility and production efficiency , We also retained the part of the variable fairing in the original solution, that is, the upper surface design is fixed, and the performance requirements of different ranges are adapted to the design of the lower surface, that is, the compression surface. ”
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Speaking of this, he clicked the mouse and turned the PPT to the next page.
There is a design drawing similar to the previous plan, but overall it looks more plump:
"After changing the compression surface, the optimization interval can be basically translated to Mach number 11.5 -17.5, corresponding to the mission requirements of medium and long-range missiles at the 5,000-kilometer range. "
"In fact, higher range optimization can also be done, but at this stage, intercontinental missiles use ordinary conical warheads. It can fly to Mach 20, and it is basically impossible to intercept. Considering the limitation of the speed of the first universe, it is difficult to further optimize even if it is replaced with the wave-bike design. It can only improve the flexibility of the ballistic and the probability of penetration is not greatly improved. , on the contrary, due to the irregular appearance, the carrying capacity of multiple warheads will decrease, so no relevant improvements have been made for the time being..."
"..."
Jing Zhiyuan didn't expect that he just guessed casually, but he really got the answer.
Although the whole process did not involve any part related to "judgment", since Chang Haonan had laid the steps, he was happy to go down:
"I'll say Well... the two vertical stability sides in front and back look like a small plane. "
Of course he also knew that he could not continue to get entangled in these places involving technical details, otherwise sooner or later Continue to reveal the stuff.
So, after a brief transition, the conversation changed:
"But Academician Chang, is this design... length a bit too exaggerated?"
He reached out to the big screen and compared the size of the aircraft:
"If installed When you get to the front of a ballistic missile and add a fairing, the overall proportion may be..."
Jing Zhiyuan couldn't think of a word to describe this feeling for a while, so he got stuck here.
But Chang Haonan must have understood what he meant.
When the Dongfeng 26 missile in his previous life first appeared, the extremely exaggerated vertebrae size of the launcher had already attracted many people.
The current solution is a wave multiplication body (Dongfeng 26 is considered a bicone), and it also connects a low-speed multiplication band and a transition section in series, so it is even longer.
For people in this era, it is normal to think that weirdness is the same.
Chang Haonan switched the section of the internal structure of the flight body that had been prepared on the large screen:
"This plan itself was designed as a carrier, and there is a separate space inside. Accommodating a modular warhead, no additional fairing is required, and it can be installed directly at the front of the missile... In addition, because the gliding distance is long enough, the demand for the missile itself is also slightly lower, and the power part can be appropriately shortened. …”
Because the specific power form has not been selected, there is no simulation diagram of the full-on structure on the PPT.
Jing Zhiyuan probably imagined it in his mind, and still felt that the head and body were a bit weirder than the design that was close to 1:1.
But as long as the performance is good enough, just be stranger.
He quickly shifted his focus to a more important place:
"The demand for the missile itself is slightly lower...so can he continue to transform it based on the Dongfeng 21's bullet body? ”
As the first relatively mature solid-fuel ballistic missile in China, Dongfeng 21 is about to be bald.
Whenever the Second Artillery had a new idea, it would almost always be taken out and changed. "It's really not possible this time..." Chang Haonan shook his head repeatedly: "The medium and long-range model requires a higher secondary separation speed. Dongfeng 21 itself will definitely not be able to achieve it unless it is undergone major modifications, but it is no different from a new model. "As for the basic model that is medium and short range and within a range of 2,000 kilometers, although Dongfeng 21 can meet the requirements of separation speed, However, it is a bit too complicated to use on such a model, and the middle has to be separated by one or two stages. The power section is a bit too long, which is not very convenient..."
"..."
Anyway, it's just one sentence -
Let go Dongfeng 21!
"The current models will definitely not meet the requirements..."
Jing Zhiyuan stood in front of the screen and pondered: "At present, there is a single-stage solid model with a range of about 1,200 kilometers under development. It was originally intended to make up for Dongfeng 11/15 and Dongfeng 21 The range between them is vacant and the progress is quite optimistic, but because of the organizational problems, they are always unable to be included in the list. We can take this opportunity to become a regular."
"As for the medium and long-range people..."
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China's solid rocket technology has only developed in recent years, so although it does not need to be restricted by the Intermediate-Range Forces Treaty, it is still not rich enough in terms of spectrum sequences.
You can actually tell from the name.
In addition to the early Dongfeng 1-5, the first digit of the Dongfeng series missile number is the rocket series, and the second digit is the serial number under this series.
In other words, Dongfeng 21 is the only model that uses a secondary rocket.
No mistakes, one poem, one post, one content, one in 6, one book, one bar, one read!
But it does not meet the requirements.
Although the updated products have concepts and plans, due to the cost-effectiveness issue, none of them have reached the formal R&D stage.
After hesitating for a while, Jing Zhiyuan confirmed to Chang Haonan again: "Academician Chang, can you estimate it separately? It will take about how many years to implement these two design plans?" >He has already made a good idea in his mind that if the time is greater than four years, he can start from scratch and develop a second-stage rocket to carry the second wave body warhead with a longer range.
"Several years..."
Chang Haonan was confused for a moment:
"The first type, we call it "Yokosuka Express" for the time being. Prototypes will be produced in the first half of next year...prototype bombs."
He almost blurted out the three words "prototype machine". "The second type is faster, so there are some problems of electromagnetic shielding and pneumatic thermal management that need to be solved. The time may be delayed a little later, but it is expected that it will be about a year later... ”
“…”
“…”
A moment of silence.
Jing Zhiyuan looked at the PPT on the screen, then looked at Chang Haonan next to him.
I didn't know where to open my mouth for a moment.
In the end, perhaps because I felt the atmosphere was a little stiff, so I chose the most out-of-sight angle:
"Ahem... Yokosuka Express, just talk about it internally. Don't go public...it's not in line with the theme of the times of peace and development."
Chang Haonan nodded.
Another silence.
Although I said this, it is obvious that Jing Zhiyuan himself thinks this name is good, concise and very targeted.
So after about half a minute, I still couldn't help but feel curious:
"The second type... is the medium and long range type. What do you think it is called?"
God knows how much effort Chang Haonan has put into holding back his laughter, and he answered with a serious and serious face: "Call... Guam Express."