Chapter 1800 Vertical take-off and landing supersonic fighter, must be done

"According to this modification, the intake temperature in the front section will be reduced from the current 1420c to 1380c, the combustion efficiency and propulsion efficiency will only be reduced by about 5%, and the service life will be increased to about 700 hours..."

Sun Hong looked at Xie Kai with a strange look.

Excitement in my heart is worse than shock.

Xie Kai is not an expert in the field of engines, but he can find the key to the problem.

It's okay not to admire it.

"Mr. Sun, can it meet our usage needs by 5%?" Xie Kai is not concerned about how much the reduction is.

Double the service life, which is a big breakthrough, is especially the thrust reduction.

"It can fully meet the use of Super-7." Sun Hong had to face such a result.

Even if you are shocked, you can only accept it.

They really haven't considered this before.

"The single-engine Super-7 A is mainly used as a senior trainer. The take-off weight requirement is not high, and the air range can be reduced as much as possible, without any problems; even the double-engine Super-7 B, two engines can fully meet the usage needs, and it will even be reduced due to the engine structure, which will not affect the range and maneuverability..."

"Since this is the case, we will continue to improve this design structure, strive to find the best design, and manufacture prototypes for experiments. There is only one thing: the efficiency and thrust-to-weight ratio must meet the usage needs of the Over-7 B, and at the same time improve the engine service life and reduce the unit's usage cost. Our Air Force has less funds, not only the fighter's performance must be advanced, but also the use and maintenance costs must be lower. Otherwise, the Air Force's funds will not be able to bear at all..." Xie Kai seemed to have no feelings.

For him, if he could not reach the service life of 1,500 hours of the Al-31 imported by the Soviet Union, he lacked competitiveness.

There is a big gap between the thrust and thrust-to-weight ratio, and the cost of use is still very high.

The current price of the al-31 engine is only more than $2 million per unit, and the unit cost is only more than $10,000 per hour; even so, the flight cost is still very high for the Air Force.

The rd-33 engine is cheap, but the performance of the fighter is much lower and the cost is low, which leads to insufficient performance.

The Air Force not only cannot afford many advanced fighter jets, but also cannot afford the flight of many advanced fighter jets.

If one hundred Su-27s fly for an hour a day, the engine cost alone would cost nearly 20 million US dollars, which is not counted as other fuel costs, airport construction costs, and overall depreciation of fighter jets.

All of these cost will be at least more than US$30 million.

This is just every day.

This year...

The national military expenditure is only about 7 billion US dollars a year, and the cost of using only 100 Su-27s is enough to make the troops bankrupt.

The economy has not developed and is equipped with too advanced fighter jets, so it is impossible to afford it.

Xie Kai has always understood why the Air Force would rather equip backward fighter jets to train pilots than equip advanced fighter jets on a large scale. With advanced fighter jets, the pilots can't fly for several hours a week.

They all have no money to make trouble.

Therefore, during their development process, engine consumption costs must be considered.

The consumption of fighter jets in the air is in units of tens of thousands.

It's full of fuel and can't fly for long.

If the engine's service life cannot be improved, a single engine will be several million. This aircraft cannot be used by the troops. What's the use of developing it?

"I understand..." Sun Hong sighed, "We have indeed fallen into a misunderstanding before and have never thought about this."

"You can't blame you for a lot of scientific research. We have no experience, and foreign countries will not teach us their advanced experience. This is also a breakthrough." Xie Kai did not criticize the other party. "The results you have achieved are already very great. When one direction cannot be understood, turn around and seek breakthroughs in the other direction. There are often surprises..."

Sun Hong deeply agrees.

After Xie Kai knew the result, he directly looked for Liao Dongfeng.

"We fully cooperate with the technical team, the old rules, and do not have to wait for the previous experiment to be completed. We will continue to produce prototypes after the improvement. We do not have enough time to wait. In addition, a group of Soviet engine experts will come here to keep confidentiality in advance..."

"Soviet engine experts? Are they here to guide us? The Ukrainian experts are so arrogant that they don't even say anything key..." Liao Dongfeng is not interested in Soviet experts.

In his opinion, any technology needs to be broken through and mastered by oneself.

If you have it yourself, you really have it, and you won’t ask for help.

"No, they are here to work, help us work, and earn them wages." Xie Kai's words made Liao Dongfeng very confused.

Before he could find out, Xie Kai left.

Only leave him to think about it.

For Soviet experts, Xie Kai no longer had the enthusiasm he used to be. After all, the group of people in the base were not serious about their work.

Now that the turbofan-6g engine can make a breakthrough, it will be easier to talk to those Soviets.

"Vertical take-off and landing design? Mr. Xie, our current design has taken many years. If we want to re-model the design and add downward take-off and landing to the engine, it will destroy the entire existing structural design..." Huo Haiyuan did not expect that while Xie Kai brought them good news, he also brought such bad news.

Xie Kai actually proposed that to add lift engines to the Super-7B, which has a short take-off distance, it is necessary to replace the vector engine that can deflect the tail nozzle at a high angle in the later stage.

This not only puts higher demands on their design team, but also puts higher demands on the engine.

"First build the project. We need advanced carrier-based fighter jets." Xie Kai's face was very serious. "If you want to build aircraft carriers and amphibious assault ships, you cannot do without this thing, otherwise we will not have vertical take-off and landing fighter jets in the future."

"Isn't there a helicopter?" It's not that Huo Haiyuan doesn't want to do this.

What Xie Kai proposed is technically difficult to achieve.

In China, there is no basic turbofan engine in China, and the vector engine with deflection nozzles is even more unaware of how to start.

"If a helicopter can solve the problem, it needs to be done? Besides, can helicopters achieve supersonic speed?" Xie Kai glanced at the boss, "If the aircraft carriers built now are equipped with our navy, which fighter can land? Relying on the Super-7a with no combat power?"

It’s not that Xie Kai wants to mess around.

Many of the Soviet experts who are about to arrive are from the Yakovlev Design Bureau.

Jacques-141's experiment is still ongoing, but this project cannot be carried out any more.

Xie Kaike would not have watched such an opportunity give up like this.

Even Peter Uffichemov, who was the first to develop the basic theory of stealth fighter jets such as "The Fringe Wave Behavior of Physical Diffraction Theory", got it back, so naturally he would not give up on Jacques-141's team.

If you can't work with experts from the Yakovlev Design Bureau, you'll end up being cheaper Americans.

The Americans used the f-35 series used by the Americans to rob their allies. Although they cannot say that they copied the Jacques-141 in terms of the design of three-axis rotary nozzles, their design experience, especially the design layout of the lift-cruising engine, came from the Yakovlev Design Bureau, and the f-119 engine used by the f-22 was also influenced by the r-79 engine used by the Jacques-141.

Xie Kai knew all this well.

The later the stage, the stronger the combined effect of vertical take-off and landing supersonic fighter withdrawals will be.

The problem cannot be solved simply by relying on a rotor helicopter.

No matter how it develops, it is too difficult for a rotor helicopter to have supersonic capabilities like a jet fighter.

It is better to engage in a supersonic fighter with vertical take-off and landing based on jet engines.

What's more, rotor helicopters will also be greatly restricted in stealth design and other aspects.

"This technology is too difficult. I have done it in China before. I was originally planning to use the J-6 as the basis, but after a while, I gave up because it was too difficult." Huo Haiyuan reminded Xie Kai.

"Has it been done in China?" Xie Kai really didn't know.

What he knew was that twenty years later, in order to develop amphibious combat capabilities in China, the amphibious assault ships came out, but there was no vertical take-off and landing supersonic fighter that could be used above, and only armed helicopters could be used.

Both the defense radius and combat capabilities are severely limited.

"Yes, I did it. In 1968, a special project team was established, which was also the hottest time for the development of short-distance/vertical take-off and landing technology in the world. However, compared with fighter jets that normally take-off, there were not many successful examples in the end..." Huo Haiyuan told Xie Kai about the situation of the short-distance project in China that year.

The purpose is to tell Xie Kai that this is not easy to do.

Even if there are countries with good foundations in the international world, there are few that can be put into practical use.

The vertical take-off and landing fighters that are in service in several countries have lagged behind in technology, and the fixed-wing fighter that is skid and takes off is the future.

What Huo Haiyuan said makes sense.

If you are doing this project at present, it will not only be technically difficult, but it will also squeeze out funds for other projects.

But no matter what he said, Xie Kai firmly opposed: "The engine problem is not big now, and Yang Wei's team can design and optimize it, and prepare for design and finalization; based on the Super-7 B, 2 to 4 lift engines are added, and turbofan engines with deflectable nozzles are not used to solve the technical problems..." Xie Kai's attitude was very clear.

Without a technical foundation, we can do something less difficult first.

Most of the existing vertical take-off and landing fighters internationally are old-fashioned designs.

For models that are in line with future development, the Jacques-141 continues to test flights and improve, and will not even be finalized in the end. Because the Soviet Union collapsed and could not continue to develop, it made wedding dresses for the Americans.

The US F-22 project has just been launched, and the F-35 has no sign of it.

Let’s start doing it now to avoid the loss of amphibious attacks and annihilation in the future.

"What are you doing? Haven't you said everything, don't do anything random?" Shortly after Xie Kai returned to the capital's office, Yue Lin came in angrily.

When they met, they asked Xie Kai angrily why he wanted to launch a new project.

"Uncle Yue, this is not a new project, but a modification. The modification work of the Super-7 must be continued, right? Whether it is the modification of the aerodynamic appearance to stealth design, or the improvement of technical performance..." Xie Kai smiled.

(End of this chapter)
Chapter completed!