MiG-21, such a backward second-generation aircraft, can it compete with the current advanced fighters? Are you kidding! Although I am satisfied with the cost-effectiveness ratio of second-generation aircraft such as the MiG-21, it is still unbelievable to say that this aircraft can single-handedly compete with third-generation aircraft. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Needless to say, others don't believe it, at this time, even Tu Jida himself doesn't believe it! Can this kind of fighter have such advanced combat effectiveness? Against third-generation aircraft? In China, that is the mission of the MiG-23, that is, the J-8 2, your own J-7, only worthy of soy sauce!

Egypt's air commander was obviously interested, although after the Fourth Middle East War, Egypt negotiated a return to the Sinai Peninsula because of its separate peace with Israel, which led to a sharp decline in Egypt's position in the entire Middle East, and Egypt did not explain anything, and kept its head up to develop itself.

Egypt is well aware of its military gap, especially the Air Force, which needs an advanced fighter to replace its old fighter planes, and this time they came to Moscow, they really have the need to order fighters.

However, among the two fighters of the Soviet Union, the Su-27 is a high-end aircraft, although they are interested, but the Soviets may not be willing to sell, don't look at Andrei said high-soundingly, it is not so easy to order, after all, Egypt's withdrawal from the war with Israel actually made the Soviet Union quite dissatisfied. Moreover, Egypt, due to limited funds, even the MiG-29 may not have enough funds to order.

Egypt needs a new fighter that can compete with third-generation aircraft, but with a good price-performance ratio!

In fact, after learning about Egypt's demand, the French Phantom company immediately contacted Egypt and tried its best to sell the Phantom 2000 fighter to Egypt, Egypt was very satisfied with the performance of the Phantom 2000, but for the price of this aircraft, they could only tighten their pockets and continue to make choices.

The Soviet Union's MiG-29 is already in the export sequence, Syria, Iraq and other countries have been equipped with this fighter, but the unit price of the MiG-29 is now about 30 million rubles, and Egypt really doesn't have much money!

Therefore, when they heard Andre say that this J-7, modified and refitted, can fight against the third-generation aircraft, they were also tempted.

Tukida, of course, was even more moved, he didn't speak, and listened to Andrei's continued explanation.

"The biggest problem with the MiG-21 series fighters is the nose air intake, which leads to the inability to place a sufficiently large caliber radar, which also loses the ability to fight at medium range, and in the current era, medium range air combat is already the standard style of air combat, and without advanced radar, there will be a lack of perception of the surrounding airspace." "So, we can improve the MiG-21 fighter and change the nose air intake to the belly air intake, so that the valuable space in the nose can be freed up, and a large radar can be installed to gain the ability to fight at medium ranges," Andrey said. ”

Change the nose! If you want the J-7 to have good combat capabilities, you must improve the nose! In history, this improvement for the J-7 only began in 96, when the J-7FS was designed, which is the way of air intake in the lower jaw, and the J-7MF was changed to the belly air intake, which completely solved the problem of the nose.

Originally, the radar could only be installed in the rectifier cone at the air intake, so the size of the radar scanning antenna was strictly limited, and if it was too large, it would cause the air intake to decrease, and it could not meet the normal working requirements of the engine, so now the J-7M brought by Chengfei used the "Air Patrol" 226 fire control radar of the GEC-Marconi company, which basically had a range of about 20 kilometers, and could only track/attack a single target, and could not give the fighter the ability to conduct air combat outside the line of sight, in the final analysis, This radar is just to help short-range missiles and even cannons better aim at targets.

"In modern fighters, the performance of high angles of attack is the most important, so belly air intake is the most suitable choice." Andrei said: "With such improvements, the shortcomings of the original MiG-21 can be compensated." ”

Change the nose! This idea has actually appeared in Tu Jida's mind for a long time, but now the improvement of his own J-7M is a small fight, and if it is improved to the nose air intake, it will be a major operation! Cheng Fei doesn't have enough funds to toss so much, and there is no suitable radar outfit now!

Marconi's radar is not suitable, and you have to find a new radar, and if the nose becomes larger and the center of gravity of the whole machine moves forward, then you have to rebalance, and the workload is not ordinarily large!

Even in the discussion of the new model, we have a model design of the ventural air intake scheme and have wind tunnel experiments, but when it comes to dealing with it, it is a huge amount of work.

"The MiG-21 appeared in the sixties, and the design at that time was indeed outdated, so in addition to the nose improvement, we can also consider improving the airfoil of the MiG-21 and using advanced aerodynamic technology to improve the combat performance of this aircraft." Andrei said.

And to change the wings? Tu Jida's brows gradually furrowed, is this a new design of an airplane?

"General Andrey, you should know that the current trend of military aircraft development is to use turbofan engines, although the cost of initial procurement is higher, but the later use costs are low, the fuel consumption rate of turbofan engines is small, and it is more convenient for logistics maintenance." At this moment, the commander of the Egyptian Air Force spoke: "This J-7, no matter how you improve the nose and wings, if the engine is not changed, it will still not be satisfactory." ”

Turbofan engines! Through the front fan, blowing air on the outer duct, directly into thrust, greatly reducing fuel consumption, is the trend of the development of the world's military aircraft, and now the advanced third-generation aircraft are using turbofan engines.

If the J-7 does not change the turbofan engine, the performance will still not go up!

That's a great question! If you only pay attention to the initial procurement cost, the turbojet engine is very cheap, if you value the cost of the entire service period, the turbofan is a better choice, in fact, it is not difficult to install a turbofan for the J-7, our RD33 engine, you can install the J-7, which can improve the performance greatly, and at the same time greatly reduce the fuel consumption rate and increase the range of the J-7. As long as you modify the rear fuselage, you will be fine. ”

Hearing this, Tu Jida finally gasped, General Andrei, you said it so easily, do you think it's building blocks? (To be continued.) )