A fighter is composed of multiple components, and the performance of each subsystem will affect the performance of the whole aircraft.

For the Oriental countries, what is most lacking is avionics and engines, among which, the engine is the most, which is the industrial Mount Everest. Even thirty years later, the avionics system has been conquered by the Eastern countries, but the engine is still a weakness. The Flying Leopard fighter had to use the Spey engine mothballed by the British, and the J-10 still relied on the Russian Al-31.

Mhammad is not a layman, at least he has the experience of later generations, knows what is lacking on both sides, in later generations, with the continuous progress of electronic technology in Eastern countries, in avionics, even began to surpass Russia, but the engine, but always a weakness.

There are a lot of mistakes, a lot of sighs, if you start to change from now on, it will definitely not be the future generations, at the same time, this is also very important for Pakistan, because, if Pakistan wants to become a real power, it needs an independent defense industry and its own technology.

It's a win-win.

The flying leopard of the eastern countries, the J-10, the fuselage is made by itself, only avionics and engines have always been the weakness of constraints, so that the J-10 did not begin to develop rapidly until the introduction of the Su-27 and the acquisition of the AL-31 engine.

"I wonder how we're going to work together?" Tukida asked Mhammad.

"If you want to have advanced fighters, you need to have advanced engines." Mhammad said: "The Tomcat fighter we are equipped with is very advanced, but the engine is a shortcoming that restricts the Tomcat, and we hope to cooperate with your country." Jointly develop a new engine. ”

Nur Khan looked at Mhammad with sharp eyes, although he had not reported the matter to himself in advance, and Nur Khan did not find Mhamad rude, on the contrary, his heart was full of joy and excitement.

Nur Khan is old. Pakistan's air force needs fresh blood and energetic people to take the helm, and now, Nur Khan is most optimistic about Mhamad.

Due to the economic situation of Pakistan, the Air Force, which burns money, receives special attention from the President although it receives special attention. In terms of equipment, they have always been very backward, so that they have to use the Jian-6 to fight with the enemy's advanced fighters, although several times the weak defeated the strong, but there is a little guilt in his heart, as the leader of the Air Force, he did not equip the Air Force with advanced fighters.

This qiē, in the hands of Mhammad, has changed significantly. Mhammad exhausted all methods to get the Pakistan Air Force within a year. There have been obvious changes, Tomcat fighters, E-2 AWACS aircraft, and electronic jamming aircraft, the Pakistan Air Force has become the air force of a South Asian power, and Nur Khan has secretly seen Mhammad as his successor.

And now. Hearing Mhammad's words, Nur Khan strengthened his judgment, Mhammad has always been building a strong air force in Pakistan, and he has a far-sighted vision, not only equipped with advanced fighters. And it's also time to cooperate in the development of engines!

Nur Khan also knew that with the state not giving a penny, there must be something else for Mhammad.

At this time, Mhammad happened to glance at Nur Khan, as if asking him for instructions, Nur Khan nodded, and Mhammad continued: "As far as I know, your country has introduced a full set of production technology of the British Spey engine, and has the ability to produce Spey engines. ”

Spey Engine! Hearing this, Chen Yijian suddenly looked at Muhammad with extremely firm eyes, and his eyes were full of heat.

Spey MK202 engine, which is a more advanced turbofan engine developed by Rolls-Royce in the mid-60s, is 5025 mm long, 1093 mm in diameter, weighs 1850 kg, has a maximum thrust of 54.5 kN, afterburner thrust of 91.1 kN, thrust-to-weight ratio of 5.05, and a maximum military fuel consumption rate of 0.0684 kg/N. hours, the maximum afterburner fuel consumption rate is 0.2 kg/N? hours, bypass ratio 0.62.

It was a full-fledged engine with a rebuild time of 1,800 hours. In the early 70s, Britain replaced this engine with the J59 turbojet engine on the F4K fighter imported from the United States. At the same time, due to the good performance, the United States also introduced the right to manufacture such an engine, which was improved into the TF41, which was used in the A-7 attack aircraft and was intended for use on the Tomcat.

Due to the fact that the Eastern countries did not have a practical turbofan engine for a long time, so, in the 70s, began to negotiate with Rolls-Royce, and in 75 years, it began to sign a contract with Rolls-Royce to confirm the introduction of Spey engines.

In the second half of '79, Xi'an Aero Engine Plant installed 4 engines in two batches. After that, a 150-hour long-term test test was completed. He also went to the United Kingdom to complete the high-altitude simulation test, the start-up test under minus 40 degrees Celsius and the cyclic fatigue strength test of the five major components, and the test results met the technical requirements. The British side said that the Spey made by Xifei has reached the standard of the original factory, which is made of British blanks, and the next step is to switch to the use of domestic self-made blanks.

It's a pity that the localization of Spey, the development of the turbofan 9 engine, braked the car here.

Chen Yijian knows the inside story, and the current Xifei is under tremendous pressure, and this pressure comes from the important project that Xifei is now undertaking, Jian-H-7.

The speed of the H-5 and H-6 is too slow, and the supersonic Qiang-5 has too short range and a small bomb load. Therefore, the Air Force is desperate for long-range fighter-bombers, and the Navy also needs long-range ship-to-ship attack aircraft. It was under this premise that the Jian-7 project was established.

However, since the establishment of the project, the Navy and Air Force have been caught in a quarrel, as a fighter-bomber, it needs two flight personnel, the Air Force wants the cockpit to have a parallel layout, while the Navy wants the cockpit to have a tandem layout. In the end, for various reasons, the 603 Institute decided to first engage in a tandem two-seater, which offended the Air Force, and the Air Force turned a blind eye to the J-7 from then on.

As a result, the J-7 became a project of the Navy, and the Navy allocated a small amount of national defense budget, and now it is an economic construction adjustment, and the J-7 has received very little funds, and as the supporting engine of the J-7, the localization of Spey has no money to continue, anyway, there are 50 original engines in stock, and the state has canceled the Spey project and paid a lot of money to Rolls-Royce.

The project of the 603 Institute is struggling, this time I came out, I saw Pakistan's advanced fighters, any subsystem, it takes a lot of money to pile up, he is full of interest, and he is also worried about the project he presides, in front of advanced fighters, J-7 is nothing.

(Writing this, East China Zhixiong is very heartbroken, there were so many detours and wasted so many good opportunities, there are institutional problems, there are short-sighted problems of decision-makers, and there are... In short, I salute the scientific and technological workers who still insisted on working in the face of adversity at that time, and finally developed various fighters such as the Flying Leopard and the J-10! It is you who hold up the skies of the Republic! ）

Hearing what Hammad said about Spey, Chen Yijian suddenly came to his senses: "Yes, now, our localization has reached 86 percent, as long as there is more capital investment, the localized Spey engine will definitely be able to be made." ”

"So, I don't know if you know, in fact, Spey also has an additional push type." Mhamad continued: "Spey is only a mid-thrust engine, but it can be improved to become a high-thrust engine. The installed range is wider, single-engine light fighters, twin-engine heavy fighters, can be equipped, for example, equipped with our Tomcat fighters, it is very suitable. ”

Isn't this TF41? Chen Yijian thought in his mind that since Spey was localized in Xifei, Xifei was more familiar with this engine, and naturally knew that Rolls-Royce also had such a modified engine, and it was successfully exported to the United States and installed on the A-7 attack aircraft.

However, although it is an additional push type, the core has not moved, but it has not been changed, it uses a new fan and low-pressure compressor, the original 5-stage fan is changed to a 3-stage fan and a 2-stage low-pressure compressor, the fan diameter is increased from 826mm to 950mm, so that the air flow and pressure ratio have increased, the imported guide vanes are canceled, the high-pressure compressor is changed from 12 to 11 stages, and the installation angle of the turbine guide blades and rotor blades has been modified, and these modifications have increased the engine thrust by 17 percent. Now, the domestic basic type has not even been developed, how can we do it again?

However, if it can be figured out, Chengfei's new model can also be used, and the heart problem of domestic fighters can be overcome.

Just, where does the technology come from? Where will the money come from? Now Spey has almost come to a standstill, and the J-7 project is also facing the risk of premature death, and the Navy's funds are simply not enough.

"Yes." Chen Yijian said: "I know there is such a one. ”

"If you are interested, we are willing to work with you to develop such a high-thrust engine, we can provide some technology, and we can also provide a physical engine, hard mapping." "I believe that with the cooperation of our two countries' technicians, we can make this engine completely," Mhammad said. ”

Pakistan out of technology? Out of the physical engine? How did you not know? When did Pakistan have engine technology? When did you get the Spey engine? They don't even have a basic type, do they? Also, how to solve the problem of funding? Pakistan's advanced fighters are now almost all borrowed.

Then, Mhammad continued to say the next sentence, which immediately made Chen Yijian pause. (To be continued......)

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