If you only change the avionics, it's a small change, because you don't move the shape, just move the internal equipment, as long as you pay attention to the gravity balance.

However, if you change the shape, it will be different. If you change the airfoil like this, you can't change it if you don't completely understand the original MiG-21 design. As long as you change it, there will be all kinds of big problems, just like those ashes of elders in later programs. You can't move. As long as you move, there are endless bugs.

Now, the Han people have changed the airfoil of the J-7, which shows that they have eaten through the MiG-21?

Qin Guan looked at the other party's surprise and knew that this fighter had conquered the other party. Originally, the holy country was his traditional customer. In later generations, a large number of his J-7 were exported to the holy country. Now, seeing the modification of his J-7, they are sure to order a batch.

At the same time, the relationship between the Han state and the holy state is good, and they also take great care of arms sales. They will never raise a big knife and kill wildly. Most of the time, it is the cost price.

The improvement of double delta wings and leading edge maneuvering flaps gives the J-7 strong air mobility, which is also the most valued by the holy national air force.

In history, it has been developed to this model, J-7E. In fact, the Han country has thoroughly understood the MiG-21 and how to change it. Now, Qin Guan takes out this fighter directly, which has completely broadened the thinking of his own experts. Yu civilization in the sky also gives full play to the performance of this fighter.

After climbing, the J-7 reached an altitude of one kilometer, then flew flat and began to turn.

Viewed from this side, it is most obvious that the wing of this J-7 fighter tilts down on the right, and the fighter begins to hover and turn!

Lieutenant general Jamal did not sit down. He was still standing and watching. Compared with the previous steering, the radius of this small angle steering was reduced by at least 20%!

In air combat, whoever has a small turning radius can turn defeat into victory in entanglement!

"How is this fighter improved and what is the matter with this wing?" Lieutenant General Jamal asked involuntarily.

"General, we have developed a double delta wing by ourselves. This airfoil reduces the dispersion of external air flow and improves the aerodynamic efficiency of the wing. We have added a leading-edge maneuvering flap. Through these measures, our fighter has been quite excellent in close combat and can fight with the F-16."

Tu Lao is very satisfied with this fighter. Due to the limitation of the nose, it is impossible to install large caliber radar. There is a big gap in medium-range air combat. However, in short-range combat, it is comparable to the F-16. In particular, the current F-16 has no ability to launch medium-range bombs!

"That's great," Lieutenant General Jamal said happily. Looking at the dazzling movements of the fighter in the air, he couldn't help but say, "please allow us to send two pilots here to participate in the common test flight."

Of course, the holy state is cautious. They should first send someone to test fly and feel the actual performance of the aircraft. If they are satisfied, they will certainly place a large order.

Now, the holy nation is also accepting the promotion of the eagle nation, that is, their F-16 fighter. They were also very interested in this fighter, but they are also angry at the fool of the eagle nation.

Of course, Yingguo sold them the version of j79 engine, which greatly reduced the performance. Of course, the quotation given to them is not expensive, only 8 million Eagle yuan. If it is the original version, it will reach 15 million Eagle yuan, and it is not provided.

In this case, if the new J-7 can achieve the same performance, it's better to buy the fighter in front of you than to buy the shrunk F-16!

Moreover, since the Han state can change the Jian-7 to this level, I'm afraid the performance of their newly developed super-7 should be more advanced.

Thinking of this, Jamal is already in a state of mind.

The holy state needs advanced fighters to fight against the white elephant state. Now, the white elephant state has updated its fleet again. The holy state's fighters don't even have the ability of medium-range air combat. Obviously, they can't have enough confidence to fight. If they can import a number of fighters with advanced performance and moderate price from the Han state, In addition, ordering a small number of advanced fighters from the eagle country is enough to maintain air superiority.

That's what they think.

Just then, the people present gave another exclamation, tail rush, tail rush!

I saw the new J-7 in the sky, with its nose up and tail down. The whole fighter was in a vertical state, but it did not climb, but in a downward state.

Han can actually try to do tail rush in the J-7 fighter, which shows that they have completely mastered all the performance of this aircraft!

Due to time constraints, the J-7 fighter did not carry out projects such as air shooting to show the advantages of the newly installed avionics equipment, but these alone are enough. These improvements of the J-7 fighter in the Han country have satisfied the guests of the holy country.

After the fighter landed, a crowd of people visited the plane on the apron.

I just watched the flight performance, mainly looking at its maneuverability, which is the performance improvement brought by the improvement of aerodynamic shape. Now, the static display is mainly looking at the cockpit.

Lieutenant general Jamal stepped on the gangway, looked at the updated modern avionics equipment, looked at the head up display, and listened to Tu Lao's introduction: "we have added a series of electronic equipment for this fighter, including head up display, atmospheric sensor, radar, etc. its combat effectiveness has been greatly improved compared with the previous J-7 fighters."

Lieutenant general Jamal has been seated in the cockpit. As an old pilot, he knows the cockpit like the back of his hand. At the same time, he is also very satisfied with the improvement of the aircraft.

Of course, it is impossible for him to sign the contract just by this visit. There will be many visits and negotiations in the later stage, but this first time has left a deep impression on him.

The day ended in a pleasant atmosphere, and in the evening, a welcoming banquet was held at Bangchui Island Hotel 30 miles away.

In addition to entertaining the guests of the holy country, the personnel of Marconi Company are also accompanying them. In their eyes, this is also a big business. If the holy country places an order, Marconi Company can also make money by exporting these equipment!

Although the state of Han is improving this fighter, the air force of the state of Han is already poor. They can't order a few planes. Only export can make money.

At this time, the people of Marconi Company did not know that they were actually passers-by a.