Set sail1992

Gao Dafei said with a smile: "See it?"

Zhang Qihang nodded: "It seems that the bomb bay is longer than the previous D-type."

Now that Zhang Qihang saw it, Gao Dafei naturally no longer concealed it, and nodded happily: "Yes, it is indeed lengthened... It has been lengthened by more than two meters, and the fuselage has also been lengthened by more than two meters. I won’t tell you the specific size, it’s all top secret now, but it’s no problem to install the new generation of long-range cruise missiles we’ve developed!”

Speaking of this, Gao Dafei said with emotion: "Thank you for speaking! If it weren't for your reminder, Mr. Zhang, we hadn't realized the seriousness of this problem at the beginning. We only knew about it after communicating with the comrades who researched cruise missiles. The existing bomb bays are not large enough to accommodate cruise missiles, but now, this problem has been solved, and after the aircraft is commissioned, missiles can be placed in the bomb bays.”

After the bomb bay is lengthened, a certain type of long-range cruise missile that could not fit in it can be put in it. Not only can it be put in, but Xifei even cooperated with the design unit of this type of long-range cruise missile to develop a built-in bomb bay. Although limited by the size of the bomb bay, this built-in rotary launcher can only integrate 5 cruise missiles, but even so, the design team of Liuye and the cruise missile are very happy: the missile After built-in, the aircraft ensures the cleanest aerodynamic shape to the greatest extent, reduces flight resistance, and increases flight range in disguise...

And all of this increases combat power!

Fly here not only adopted Zhang Qihang's original suggestion of lengthening the bomb bay, but also adopted Zhang Qihang's proposal of "making full use of the bomb bay space and developing a series of multi-purpose modules". For this reason, XAC cooperated with major Together, the unit has developed a variety of different bomb bay modules, including built-in fuel tank modules, built-in electronic detection modules, built-in electronic exhibition modules and other application expansion modules with different functions, which greatly enriches the application of Liu Ye and deployment flexibility.

Zhang Qihang waved his hands again and again, and said politely: "Don't say 'thank you', I just made such a suggestion, the comrades of the research project team who are really doing the work, I just use my words, and it is everyone who really puts effort into it."

"Brother, you are modest." Gao Dafei smiled and shook his head: "Brother, take a look again, can you see any improvement?"

After looking carefully for a while again, this time, Zhang Qihang was helpless, he shook his head: "I really can't see it now, what improvement is there? Well, I can't say it and forget it."

"We can still talk about this matter, and there is another one, that is, we have reserved pipelines for aerial refueling," Gao Dafei said to Zhang Qihang in a low voice, "But you also know that our country has been keeping a low profile these years. ..."

"understand!"

Before Gao Dafei finished speaking, Zhang Qihang nodded repeatedly.

Understood!
Although Gao Dafei's words were vague, how could Zhang Qihang not understand what he meant?What he really wanted to express was that although we can now enable our sixth master to have the ability to refuel in the air, this is a bomber and it is too sensitive, so although we have this technology, due to the needs of the international situation, Let’s do this for the time being. After a few years, our strength will increase. At that time, we only need to open the skin of the fuselage at the corresponding position, and connect the oil receiving probe to the reserved position. Liu Ye will immediately have the ability to receive oil in the air , when the time comes, the combat power will immediately double.

What made Zhang Qihang most happy was that he had proposed this suggestion at the beginning, and unexpectedly it was adopted, which made Zhang Qihang feel really happy.

Gao Dafei, on the other hand, suddenly changed his tone and asked Zhang Qihang, "Mr. Zhang, has our Huateng Group continued to improve D-30KP-3?"

Continue to improve the D-30KP-3?

Zhang Qihang frowned, a little puzzled: "Could it be that Xifei is not satisfied with the performance of D-30KP-3?"

After all, Liu Ye is the foundation of a medium-sized bomber. In the original time and space, the use of two D-30kp-2 engines has brought about earth-shaking changes to its flight performance. Now in this time and space, two D-30kp-3 engines The application of 100 has brought Liuye’s overall performance to a higher level, and also made Liuye the first domestic large aircraft with a maximum take-off weight of more than [-] tons before the Universiade entered service. Zhang Qihang was puzzled by the problem of Gao Dafei Le: It's all like this, is Xifei still not satisfied?

Mr. Feng Guoqing, who had been silent all this time, also looked at Gao Dafei with some doubts.

Having already talked about this, Gao Dafei naturally stopped hiding it. He pursed his lips and said to Zhang Qihang and Mr. Feng: "Mr. Zhang, Secretary Feng, that's it. The jumbo jet transport project of…”

Now, before Gao Dafei finished speaking, Zhang Qihang and Mr. Feng had already understood.

As the largest military aircraft manufacturer in China, XAC has a deep sense of mission and responsibility for the development of large jet transport aircraft, and as early as the early 90s, XAC had already started pre-research on large transport aircraft After that, the failure of the "Falcon" early warning aircraft project further stimulated XAC. At last year's Zhu@hai Air Show, XAC showed their latest research results to the public for the first time: a single-wing , T-shaped high-level tail, and a large transport aircraft with 4 jet engines.

As XAC's in-depth partners, Zhang Qihang and Mr. Feng naturally know that the reason why XAC displayed this model at this air show is that the country has basically reached an agreement on the development of a large jet transport aircraft. , Basic preparatory work has already begun.

Now that Gao Da Fei Gao mentioned the jumbo jet transport plane, why didn't the two of them understand what he meant?Mr. Feng asked Gao Dafei somewhat puzzled: "Mr. Gao, I understand what you mean, but the performance of the D-30KP-3 should be sufficient."

You know, when Xifei was engaged in pre-research in the early years, the engine to be used was the old man's D-30KP-2. Now that it has a stronger thrust and more fuel-efficient D-30KP-3, Xifei is actually Starting to be dissatisfied?
Gao Dafei smiled and said: "For large transport aircraft, the more powerful the power, the better. If you can make further improvements to D-30KP-3, the performance of the new engine can reach or approach that of Soloviev The level of the PS-90A engine of the design bureau, it could not be better."

张起航都有些被高大飞的好胃口给惊到了：达到或者接近PS-90A发动机的水平？您也是真敢想。摇摇头，张起航无奈的说道：“PS-90A的最大推力可是有176千牛，我们的D-30KP-3的推力才多大？130多千牛，想要达到这个水平……”

Speaking of this, Zhang Qihang couldn't help shaking his head: "Mr. Gao, the foundation of D-30KP-3 is here, it's impossible."

"It's really difficult to reach the thrust level of PS-90A." Gao Dafei nodded first, approving Zhang Qihang's words, and then said: "But now it's 130 kN, and then optimize and improve it to 140 kN It shouldn't be difficult, right?"

"140 kN?"

Speaking of this, Zhang Qihang was serious, he pondered for a moment, and said: "Mr. Gao, to tell you the truth, when we were working on the D-30kp-3 project, there was really such a thing as a D-30KP-3 According to our calculations, this deeply improved version of D-30KP-3... or D-30KP-4 is fine... the maximum thrust can even reach 145 kN..."

"145 kN? That's amazing!"

Hearing this number, Gao Dafei was refreshed, but he was still able to hold his breath. Although he was very excited about this so-called "D-30KP-4" plan, he still kept calm enough: "Then We are also considered partners, why have I never heard of this plan?"

"Because the cost of this solution is too high," Zhang Qihang said: "Take the D-30KP-3, which is about to complete the airworthiness certification work, as an example. In fact, 75% of the parts of the entire engine are in common with the D-30KP-2. , the overall cost is not as high as buying D-30KP-2 directly from Lao Maozi, right?"

"Well, that's right."

Gao Dafei nodded, waiting for Zhang Qihang to continue.

In fact, the cost of the D-30KP-3 engine produced by the Xifei-Huateng Aero-Engine Factory, which is jointly invested and constructed by the Xifa Factory under the Xifei Group and the Huateng Industrial Group, is still relatively high at this stage, probably more expensive than the direct purchase of Russian engines. The original D-30KP-2 is about 30% higher, but everyone has done calculations. When D-30KP-3 is mass-produced in the future and the production capacity reaches 1000 units, the manufacturing cost will be quickly diluted to more than 800 million. , at least 30% cheaper than the Russian-made D-2KP-20.

An engine is only 20% cheaper, which doesn't seem like a big deal, and it doesn't cost much more, but after purchasing more than 1000 units, the savings in funds and defense expenditures are quite considerable.

But saving money is one thing, and ensuring combat effectiveness is another. Although Huateng Industrial Group quickly modified two D-30KP-2s on the basis of D-30KP-3, there are still doubts : The ground test of these two engines has not found any problems for the time being, but they have not passed the test flight after all, and the whole process of airworthiness certification, even if everything goes well, will take several years. Will this delay the development of the third-generation H6? Work?
So from the very beginning, there have been constant disputes over whether the H6 should be equipped with the Russian D-30KP-2 or the Huateng Industrial Group's D-30KP-3, even if the leaders above chose the D-30KP with great perseverance and courage. -3, there are still a lot of skeptical voices coming out.

Now, listening to Zhang Qihang's words, it seems that there are still some unknown aspects of this engine solution called D-30KP-4, which makes Gao Dafei's heart involuntarily aroused with deep curiosity.

张起航说道：“在搞出了D-30KP-3之后，伊佐托夫先生和雅罗斯拉夫斯基先生继续对D-30KP-3发动机进行优化，优化的重点是D-30KP-3发动机上面继承自D-30KP-2的75%的部件，比如燃烧室、涡轮叶片之类……

在经过重新优化之后，新的D-30KP-4方案的涵道比从D-30KP-3的3.6提升到了4.2，很接近PS-90A的4.6了，推力也来到了145千牛，另外油耗也进一步降低……唯一的问题是，相比于与D-30KP-2共用75%的零部件的D-30KP-3相比，D-30KP-4与D-30KP-2之间的零部件共用比例降至了不足25%，成本也上升了很多，技术风险也提升了不少……”

Hearing what Zhang Qihang said, Gao Dafei smacked his lips, and said in a puzzled way: "No, why haven't I heard of this D-30KP-4 plan?"

"It's simple," Zhang Qihang said with a smile: "Compared with the technically mature D-30KP-3 plan, the risk of the D-30KP-4 plan is much greater, and the cost has also increased a lot, but the maximum thrust However, it only increased by 8%. Overall, it seems that it is not cost-effective, so such a technical solution was formed. After confirming that the feasibility of this technical solution is far inferior to that of D-30KP-3, this solution was released as a technical reserve. Woke up."

"..."

Gao Dafei didn't know what to say for a moment.

From the perspective of feasibility, Huateng Industrial Group chose D-30KP-3 instead of D-30KP-4, there is no problem at all: D-30KP-3 is actually an upgraded version of D-30KP-2, so to speak The scheme is the most mature and reliable, but the D-30KP-4 is different. It belongs to the deeply upgraded and improved version of the D-30KP-2. From the change of the bypass ratio, it can be seen that this engine has been replaced by Huateng. Those former Soviet aero-engine experts in the industrial group may not even recognize their mothers. With China's relatively weak aero-engine technology and industrial supporting level, there is no doubt that although the D-30KP-4 is indeed better , but from the perspective of reliability and success rate, D-30KP-3 is more reassuring... Even if it is more reliable and has a higher success rate, D-30KP-3 did not know how many people were there Chi Chi Wai Wai.

Gao Dafei's original idea was to ask Huateng Industrial Group if it had a more advanced engine, but it turned out that it would be better not to ask: yes, there is, but it is still on paper...

After hesitating for a long time, Gao Dafei sighed, and said to Zhang Qihang: "Let me tell you about this situation first, and hear what everyone means..."

He really didn't dare to risk such a radical engine that was still on paper.

When it came to Gao Dafei, Zhang Qihang nodded and said: "If Xifei thinks that the D-30KP-4 is more in line with the requirements of our large jet transport aircraft, and at the same time accepts the possible risks, then we will go back and try again." Discuss slowly."

至于未来的WS20涡扇发动机，可能在很多人的眼里，还不如D-30KP-4靠谱呢，如果让他们必须在WS20和D-30KP-4之间选一个，恐怕他们宁可选择D-30KP-4。

....................................

On November 11th, an aircraft that looks completely different from the previous H12, but still maintains the general style of the H6, started to accelerate rapidly from the runway of a flight test center in Chang'an. When the speed reached the take-off speed, Accompanied by the pilot's movements, the plane lifted its nose lightly and rushed into the blue sky.

Seeing this scene, there was warm applause at the scene. Many people, including Zhang Qihang and Mr. Feng Guoqing, looked at the yellow plane in the sky and burst into tears!