"You're going to replace the turbofan-10 with your D-30F-6?" Understanding Lin Hongfei's good appetite, Gu Ruihe smiled bitterly, "The turbofan-10 is a key project of our country, Shen Fei's J-11B and Chengfei's J-10 are equipped with this engine, for this engine, our country even dismantled the gas turbine that we bought from the Americans, Mr. Lin, you are not authentic enough." ”

"Okay, J-11 and J-10 forget it," Lin Hongfei shook his head, it was not easy to make a fairly good engine in China, and the current turbofan-10 is waiting for the rice to be cooked, if he inserts a kick, the progress that the country has made in the military turbofan engine with great difficulty will be wasted, but Lin Hongfei is still a little unwilling, "Since the J-10 and J-11 are not successful, then the J-7 and J-8 series can always be used, right?" ”

Seeing that Gu Ruihe wanted to speak, Lin Hongfei immediately opened his mouth and blocked his mouth, not giving him a chance to speak, "Don't tell me that the turbojet-13 that is being used now and the turbojet-14 that is being tested in small batches, how much fuel is used by the turbojet-13, do you know how much fuel the turbojet-13 costs?" As for the vortex-14......" Lin Hongfei grinned, "It's okay to fool the public, but it's a little too much to fool your own people, right?" ”

"Okay......"

Gu Ruihe smiled bitterly, as Lin Hongfei said, now the J-7 and J-8 are being mass-produced or turbojet-13 engines, although the turbojet-14, that is, the "Kunlun" engine has good technical indicators, but the real industry insiders know that the fuel consumption rate and stability of the turbojet-14 are deeply criticized by the testers and the military for small batches, and the J-8 that was equipped with the turbojet-14 had to be replaced with the turbojet-13 as a last resort.

It's just that even so, Gu Ruihe was also a little hesitant. "But the diameter of the turbojet-13 is only more than 900 millimeters, and the weight is only 1.24 tons, but the diameter of the D-30F-6 you got from Lao Maozi is 1020mm, and the weight is 2.4 tons.

"Pull it down," Lin Hongfei grinned, he didn't believe Gu Ruihe's words. "You Cheng Fei and Shen Fei have done less about the redesign? Let's see how many improvements have been developed for the J-7 and J-8? What is the maximum afterburner thrust of the turbojet-13? 6600 kg. The maximum thrust of D-30F-6 without afterburner is as high as 9500 kg, and the afterburner thrust is directly 15500 kg, whether it is J-7 or J-8, with this engine, even if it is full of fuel and full bomb to take off. The thrust-to-weight ratio of the whole machine is also more than 1, right? ”

Gu Ruihe was silent, he had to admit that what Lin Hongfei said was the truth.

The J-7E fighter produced by Chengfei in order to cope with the retirement of a large number of J-6 women uses a turbojet-13 engine. The maximum take-off weight of the J-7E and the J-7MG that is now being worked on is only 9,100 kg. The maximum thrust of the D-30F-6 engine without afterburner is 9500 kg, which means that if the J-7 fighter uses D-30F-6, even if the weight of the engine is increased by 1.2 tons, the thrust-to-weight ratio of the engine and the whole machine is also wireless close to 1, if the afterburner is removed, maybe the thrust-to-weight ratio of the whole machine is almost on 1, and theoretically the aircraft can almost take off vertically.

The J-7 is still the same. What if it's a double-engine J-8? The maximum take-off weight of the J-8II is 17.8 tons, and if two D-30F-6 engines are replaced, the maximum take-off weight is about 20.4 tons, including the total increase of about 2.6 tons due to the enhancement of the fuselage due to the replacement of engines. The thrust-to-weight ratio of the whole aircraft is also more than 1.5 when it is full of fuel and ammunition, which is not theoretical, and the aircraft can be used as a rocket immediately when it is erected.

In the case that the turbojet-14 has fallen into a de facto standstill, the turbojet-13 can only be used improvised, and the J-7 and J-8 seem to be in production for many years, it is also a good choice to replace the high-thrust turbofan engine for the J-7 and J-8, but the question is ...... "But the turbojet-13 is very cheap, and it meets the requirements of the J-7 and J-8 low-cost combat aircraft, let's not talk about when your D-30F-6 will be able to be used, and the price?" How much does an engine cost you? And how much are you going to sell? ”

This is indeed a question, how cheap is the turbojet-13, although I don't know what the price of the D-30F-6 is, but even if it is cheap, the price may not be much cheaper than the imported AL-31F, right?

"I can't say how much it will cost, but what if I guarantee that the price won't be half as expensive as the Turbojet-14?"

"Half as expensive as the Turbojet-14? Equivalent to 1.5 times that of the Turbojet-14? Gu Ruihe straightened up violently, his eyes were full of shock, "Mr. Lin, are you serious?" ”

If the D-30F-6 engine can really be taken down at 1.5 times the price of the turbojet-14 engine, then what is there to hesitate about? Although he has not yet communicated with the leading comrades of the Air Force and the HNA team, Gu Ruihe is sure that as long as the cost does not rise much and the performance of the J-7 and J-8 can be guaranteed to be greatly improved, the leaders of the Air Force and the HNA will be happy to jump three feet high.

Yes, the J-7 and J-8 have actually flown fast enough, and the maximum flight speed of both aircraft is above Mach 2, but Mach 2 is definitely not the target of the military.

Because of the existence of the SR-71 "Blackbird" and "Dawning Goddess", in terms of the international defense posture facing our country, there will still be a considerable market for high-altitude and high-speed interceptors for at least the next 30 years.

Even if this is not counted, from a military point of view, no matter when "condescending" is a huge advantage, although the third-generation multi-functional fighter can fly at an altitude of 16000 meters to 18000, but in fact, at an altitude of more than 15000 meters, the actual performance of the turbofan engine that emphasizes the ability of medium altitude combat at the beginning of the design is even less efficient than the turbojet-13 used on the J-8, and attacks F-16, F-15 and other fighters from the top. A huge advantage in itself.

Don't think that the eighth master is a second-generation aircraft, the second-generation aircraft should be eliminated, countless facts have proved that there is no most advanced equipment only the most suitable equipment, and the eighth master is used well, and it is not a big problem for the eighth master to bully and bully F-15 or even F-18.

Shen Fei even began to regain the double "25" project of the year, and began to re-develop the super J-8 with a maximum speed of Mach 2.5 and a maximum flight altitude of 25,000 meters on the basis of the J-8...... Although it is only in the consideration stage now, almost 15 years later, this product will be called J-8G.

As a turbofan engine designed for high altitude and high speed at the beginning of the design, the D-30F-6 engine is a wonderful flower among the turbofan engines, and its 0.4 bypass ratio is more than that of the turbofan engine used by most third-generation fighters in this era, which also makes the D-30F-6 turbofan engine have similar performance as the turbojet engine. While other turbofan engines were still struggling to climb to an altitude of 20,000 meters, the MiG-31 using this engine was already aiming at an altitude of 24,000 meters.

What's even more rare is that while maintaining high-altitude and high-speed performance, the D-30F-6 has much smaller fuel consumption than the turbojet engine, not to mention that the MiG-31 is a super fuel guzzler, don't look at how the woolly bears use the MiG-31.

"Of course I'm sure," Lin Hongfei nodded, "Secretary Gu, you should know that the core engine of our imitation D-30K engine has been ignited, and after this period of trial operation, it has been proved that the performance of the engine is good, Secretary Gu, you should know about this situation, right?" ”

Gu Ruihe nodded again and again, how could he not know about the ignition of the D-30K engine core engine of AVIC Second Group? At that time, there were not only leaders of relevant central departments, guests from Boeing and Airbus, but also himself, although Gu Ruihe would never admit that when the core aircraft was successfully ignited, he also clenched his fists.

"D-30K and D-30F-6 core machine is basically the same, we have the information of D-30F-6 core machine, after comparison, we found that there are not many places that need to be adjusted, we are about to break through in the new generation of monocrystalline materials, there will be no problem with the mass production of D-30 series engines, D-30F-6 is naturally no problem," Lin Hongfei looked at Gu Ruihe, his expression was extremely sincere, "Secretary Gu, why don't you communicate with the leaders of the Air Force and HNA to see what they mean?" ”

What else to communicate, I'll make my own decisions.

Gu Ruihe immediately decided, "In this way, you send us the relevant data of the engine first, and I will let Cheng Fei and Shen Fei analyze how difficult it is to reissue the J-7 and J-8." ”

"No problem." Lin Hongfei nodded immediately, as long as Gu Ruihe agreed, even if Gu Ruihe didn't say anything about this kind of thing, he would take the initiative to send the information over.

"Again, you guys make a timetable, it's best to get a few prototypes, you can't let us look at your data for testing, right?" Gu Rui River Channel.

Secretary Gu thinks very long-term, since according to the international and defense situation we are facing, there will still be a market for high-altitude high-speed interceptors in the next 30 years, and the demand for "Super J-8" is still urgent, then this "Super J-8" will simply have a high starting point. (To be continued......)