The father of the double-decant wings is the Dragon fighter produced by the Swedish Saber Company.

The so-called double-triangle wing refers to an ordinary wing that is a triangular shape with a sharp tip. The sweep angle of the wing is a fixed value, while the sweep angle of the wing is more like a structure where two different triangles are combined together. For example, the Dragon fighter has a sweep angle of 80 degrees on the inside, which adopts a large-thick wing body fusion design, providing a spacious space for accommodating fuel and the main landing gear. The outer wing section is a small triangular wing with a thin wing shape with a sweep angle of 57 degrees. The outer wing section is a design that helps improve the low-speed performance of the fighter and shortens the take-off and landing distance, while retaining the low resistance characteristics during high-speed flight. The vertical tail also adopts a sweep design.

Because the Dragon fighter is a tailless delta wing layout commonly used in the West, while the J-7 is a normal aerodynamic layout with wings and tails, the two are not the same.

"We fighter jets like us also need to be modified into a double triangular wing shape, with an inner wing sweep angle of 57 degrees and an outer wing sweep angle of 42 degrees, and a front and rear edge maneuverable flap must be added. After this improvement, this fighter jet will have unrivaled close combat performance. Even the American F6 will not be able to take advantage of close combat." Zhang Feng said while gesturing.

It was not because Zhang Feng deliberately concealed this improvement, but because Zhang Feng had to first determine whether the other party would really make up his mind to make improvements. As long as the other party made up his mind, then of course he would tell the other party what he knew.

However, Zhang Feng knew that this knowledge was originally something that the other party could summarize after a few years. In history, until the late 1980s, Lu Yingyu, the chief designer of J-E and student of Tu Jida, boldly tried to introduce the research results of Professor Shabernan of Northwestern Polytechnical University, and creatively changed the original triangular wing to a double triangular wing, and equipped with front and rear edge maneuverable flaps, which greatly improved the maneuverability of the aircraft. At the same time, it was replaced with a new large-powered engine, and the maneuverability of the J-7 was improved by a level, far exceeding the MiG. In fact, Zhang Feng was equivalent to plagiarizing their research results. However, it was applied to the original object, which was only a few years later.

"His Excellency Kusai, your knowledge is so rich." Song Wencong said, "We did not expect that you were so knowledgeable that both of us were ashamed of our own."

"Where, where," said Zhang Feng: "Using this wing structure requires redesign and the wing overall fuel tank is adopted. In this way, the aircraft's fuel storage will be increased to ensure that this fighter using turbojet engines has sufficient range."

The overall fuel tank of the wing refers to sealing the internal space of the wing to form a fuel tank structure, which can increase the oil load by nearly 50% and increase the range.

"If our fighter jet can be put into mass production in the end, its performance will definitely make a qualitative leap forward on the original J-7," said Tu Jida.

"It's o, should this fighter be given a new name?" Mr. Song also said.

"I think this fighter jet has a J-7 that has a comprehensive performance exceeding that of the J-7. " said Mr. Tu, "Our internal engineering code is called Super Seven."

Super seven? Sure enough, history is still shockingly similar! Zhang Feng thought to himself, looking at the scene outside the window, and he said, "Our Baishao Aircraft Factory has arrived."

Kashen also got off the car in the car behind. Originally, the production line of his company had to be strictly approved before it could be visited. However, even if the agreement with these Chinese companies was reached, they would come here to install and test flights in the future. Moreover, this production line is already very backward for the United States and was modified from the F5 production line, so Kashen did not raise any objections.

At this time, various equipment in the huge factory were installed and debugged under the guidance of American technicians.

Although it was already backward equipment imported from the United States, it was still very touching for Chinese visitors. China's workshops for producing fighter jets were still very backward.

For example, in that large workshop producing aircraft beams, there is a large equipment: CNC machine tool!

The aircraft beam is the main force-bearing part of the aircraft, which is equivalent to the spinal beam entering the skeleton, which plays a crucial role in aircraft flight. The uneven processing of the beam wall will directly affect the aircraft's flight performance. The quality of the beam processing is directly affected by the aircraft's flight safety. For example, due to processing errors, the strength in some places will decrease. In fierce air combat, large overload may cause the aircraft beam to break and the fuselage will also be broken into two sections.

As for this set of beam production equipment, the negotiation team sent by Zhang Feng also spent a lot of effort. Northrop started to only provide finished beams and did not want to provide processing equipment, because this CNC machine tool is a very complex processing machine and is also a strictly controlled external output processing tool by the United States.

If processing equipment is not provided, what is the production line? For this issue, the two sides negotiated for a long time and finally reached an agreement: the United States will provide the forged beams and the Iraqi side will perform cutting and processing.

The beam was first pressed by a large hydraulic press to press the blank into the required shape and then cut. Therefore, although Northrop promised to export the production line, it was still trying its best to hinder the specific problems.

Iraq agreed, and Zhang Feng knew that obtaining a set of CNC machine tools means a great development in Iraq's processing level.

However, when this set of machine tools came, Zhang Feng knew that he was fooled by the other party again.

This set of CNC machine tools has an old-fashioned machine tool that has a history of nearly ten years. It does not use a microprocessor, and there are electronic tubes inside it!

However, the treasure knife is not old, and no matter how backward this set of machine tools is, it is much better than using old-style machine tools that rely entirely on their own experience.

Zhang Feng could only hope that this machine tool would be adjusted well and perform to its best condition. Therefore, here, the workplace he sent was also the best. A few of them came back from abroad and understood the technology in this area, so the Americans couldn't fool them.

"What is shown in front of you is our company's most advanced processing equipment." Kashen said shamelessly to these Chinese imports: "If your plane beam needs to be processed, it can also be carried out through this set of equipment."

"Can you process titanium alloy beams?" At this time, one of the people in the group asked.

Titanium alloy? Kashin frowned: "Of course it can be processed, but the titanium alloy beam is relatively expensive and is not suitable for this light and cheap fighter."

Titanium alloy beam is a high-tech fighter jet, so it is impossible to output these technologies. The f20 uses only ordinary aviation and air-use high-strength aluminum alloy. On the f20, titanium alloy mainly exists on the engine, but the engine is imported as a whole.

Moving forward, all kinds of equipment dazzled Chinese enrollers, and all the enrollers felt the gap with each other.

Walking to a workshop, the United States entered the United States and was training Iraqi technicians to skin and rivets.

The outer skin of the aircraft is not welded, but is made of rivet structure.

Although these technicians have been trained for half a month, they are still far from meeting the requirements. They are busy on their own small model.

Even a rivet can reflect the gap! Because, on Chinese fighter jets, those rivets can be clearly seen, as if they were patched, very conspicuous.

From their perspective, those rivets are only allowed to be nailed, but now, the technical invoices have very strict requirements. After the riveting is completed, they have to be polished and finally painted, which will be integrated with the surroundings.

Keep improving!

Just as this group of Chinese entered the plane production line, another group was also busy on the other side of Zubaier city.

Compared to the relaxing atmosphere here, the other side is very tense.

Although not very far apart, Iraq has done a very good job of confidentiality, with a large number of soldiers patrolling to ensure that there is no disturbance between the two tasks.

Mr. Liang had no idea that the domestic delegation was coming again. He was still developing a new type of cruise missile with Iraqi technical inlets.

The test flight, inertial navigation system and terrain matching system in the previous stage have been able to work normally. Now, what they need to do is to amplify the bullet body, and then free up the part occupied by the solid fuel engine for liquid fuel to occupy it. Since the tail is a small turbojet engine, an additional air inlet needs to be added.

Cruise "Missiles do not need to do too much high overload movements. Most of the time, they are flying stably, so the technical difficulty is not very high.

Moreover, at this time, the domestic 0802 missile was also under development, so the team led by Mr. Liang carried out a lot of reference work, greatly speeding up the progress.

The final design of this cruise missile has a total length of 7.3 meters. It eliminates the boost rocket engine at the rear. The missile has a length of 6.1 meters, a diameter of 0.4 meters, and a total weight of 800 kilograms.

At the beginning of its development, this missile was considered to be able to be mounted on most of the aircraft in service in Iraq and launched from the aircraft without carrying the rocket booster behind it, with a range of 320 kilometers, and a range of 280 kilometers was launched from the ground.

Joseph's current work is actually very easy, because the design of the bullet is not under his control. As long as the Chinese side has made the bullet and connected the guidance system he designed, the manufacturing and test firing can be completed.

This time the turbojet engine arrived, they were carefully installing the turbojet engine on the bullet body, refueling, powering up, and on the test bench, preparing to conduct several experiments first, and then conduct live-fire experiments after correctness.

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Chapter completed!