Chapter 154

His soul lingered. Fortunately, he was used to it. Looking at the change of scenery outside the window, Qin Guan was also wondering where he would take himself?

This type 18, the most likely, should be in Shen Hoy?

Qin Guan silently recalled this history.

This has to start with the pyramid state.

During the "sixth five year war" in 67, the Han state took the initiative to provide assistance to the pyramid states. In 73, the pyramid state launched the "October war". By virtue of the sudden attack, he won a major victory in the first war and restored the self-confidence and sense of honor of the pyramid people.

After that, the pyramid country purchased 8 mig-23ms interceptors, 8 mig-23bn attack aircraft and 4 mig-23u trainer aircraft from the bear country.

During this period, the relationship between the Han state and the pyramid state was also developing continuously. The Han state supported Egypt morally and materially by providing 10 million Eagle yuan in cash exchange, 100000 tons of wheat and 30000 military equipment.

After the October war, the pyramidal state and the eagle state quickly moved closer and gradually distanced themselves from the bear state.

After the breakdown of the relationship between the two sides, the pyramid countries turned to western countries, especially chicken countries to buy aircraft.

Naturally, parts and technical assistance from the bear country also stopped, so the new MiG-23 was grounded after a year of service in the pyramid air force. Two years later, these MiG-23 aircraft were withdrawn from active service and transferred to inventory.

In this case, the Han and pyramid countries carried out extensive exchanges, and finally made some progress and reached an agreement.

Pyramid agreed to provide Han with 10 mig-21mf fighters, 2 mig-23ms fighters, 2 mig-23bn attack aircraft, 2 mig-23u combat trainers and 10 as-5 "Celtic" air-to-air missiles in exchange for Han providing parts and technical support for its huge MiG-17 and MiG-21 fleet.

The imported aircraft are also of great help to China, which imitated the j-7iii all-weather fighter on the basis of mig-21mf. The mig-23ms was "technically dismembered" and "step by step" supported J-8II, j-9, J-13, qiang-6 and other projects.

Among them, this mig-23ms, in order to hide people's eyes and ears, was painted into type 18.

Compared with previous aircraft, the biggest feature of this aircraft is the use of variable swept wings, which is a trend of this era. Unfortunately, the ideal is very plump and the reality is very skinny.

Although variable swept wing has achieved wing efficiency at various speeds and heights, it can not solve the problem of structural overweight, and has been eliminated in future generations.

At the same time, although the Han state did not absorb the technology of variable swept wing, it still learned other things, transformed them into achievements, and applied them to many of its own fighters.

For example, the air inlet and folding abdominal fin of J-8 II aircraft come from MiG-23

At the same time, with the introduction of two r-29-300 engines, China soon organized experts to analyze and study, and began surveying and mapping in 79, named turbojet-15.

The turbojet-15 engine is a turbojet engine with double rotors, annular combustion chamber, pneumatic nozzle, high-temperature turbine and stepless adjustable afterburner thrust. The maximum thrust is 81 kn and the afterburner thrust is 122.5 kn. The thrust weight ratio is 6.5.

It can be found that it is almost the best in turbojet, and its performance is very advanced.

However, due to the problem of fuel consumption rate, turbojet engine has fallen behind, and turbofan will be the mainstream.

Now, Qin Guan is thinking about the benefits of MiG-23 to his side. At the same time, what role should he play in it?

Several hours of flight passed quickly. Finally, the helicopter landed at an unknown base.

Even Chen Rui was not qualified to enter until he arrived here. Captain Liu Yuan took Qin Guan and Xiang Jing to the hangar in the base.

When the gate of the hangar was opened, it was the MiG-23 fighter guessed by Qin Guan. The rectangular and flat air inlets on both sides, the tall vertical tail and the movable swept wing were its most obvious characteristics.

At this time, beside the plane, many people were studying. One of them, a hale and hearty old man, knew Qin Guan.

"Old song, are you here too?" Qin Guan asked. The old man was song, who was led by 6611 Research Institute. He had a cordial exchange with Qin Guan when he was at the base near the capital.

"Qin Guan, you're here at last." old song smiled and said, "I recommended the superior and asked you to come. This is a top secret fighter. How about it? What do you think of the performance of this fighter?"

Laymen watch the excitement, while experts watch the doorway. As long as you open your mouth, you will know the level.

At this time, with the question of Mr. Song, many other researchers looked over. What is the ability of this young man who is highly respected by Mr. Song?

Looking at the new type 18 painted with green paint on the nose, Qin Guan said: "I think this aircraft has fallen behind and is not worth studying. The reverse mapping of this aircraft will waste time and affect our thinking."

As soon as Qin Guan said this, the whole audience was stunned.

Now, the main force of the country is still J-6 and J-7. For this kind of aircraft, MiG-23 definitely belongs to the advanced ranks. Apart from others, its takeoff thrust weight ratio exceeds 1!

Now, Qin Guan, a young man, is actually telling them that there is nothing to study about this aircraft. Hurry up and wash and sleep.

How can this not surprise others? After being surprised, some people began to question, which onion are you?

You said this plane was useless?

Qin Guan knew that if he said so, he would certainly attract countless white eyes and doubts. However, in order to stop everyone from taking detours, Qin Guan decided to give up.

"First of all, it adopts the way of air inlet on both sides, which will block the air inlet on one side when turning, resulting in a rapid decline in air inlet efficiency. Moreover, today's aircraft pay attention to the mobility at high angle of attack, so belly air inlet is the most appropriate way."

First of all, the air inlet is not suitable!

The efficiency of MiG-21 nose air intake is the highest. No matter how it flies, it is not blocked. However, in this way, it is impossible to arrange large-diameter radar on the nose. Therefore, the nose must be reserved.

Where should we deploy the remaining solutions? Either on both sides or on the belly. Early aircraft like to be arranged on both sides, while later advanced third-generation aircraft like to be arranged on the belly.

"Although the variable swept wing looks beautiful, its overweight structure adds additional burden to the aircraft and offsets the advantages brought by the variable swept wing. At the same time, this kind of aircraft also adopts manual control rather than computer automatic control of the swept wing. In the fierce air war, pilots have to be distracted to set the wing swept angle and pit."

"And its engine. As we all know, the trend in the future is the turbofan engine, because its fuel consumption rate is quite low, and now this aircraft still uses turbojet. All our aircraft have broken legs. Look at Western aircraft, which have a voyage of more than 2000 kilometers. It's not necessary for us to spend more effort to imitate this engine."