Chapter 141: Stealing people, you can’t talk about military ethics
As the design work of the J-7F comes to an end, the specific performance indicators of this aircraft have gradually been determined.
Overall quite surprising.
If I have to be critical, the only shortcoming is the power.
The turbojet 13FII is indeed a usable model, but it is still somewhat unsightly when installed on the J-7F.
On the one hand, the fuel consumption of the turbojet 13FII is relatively high, and a fuel tank in the original lower jaw part is occupied by the air intake, which makes the already poor range even worse.
The original J-7 was just a day fighter that relied heavily on ground guidance. Its shorter range was barely acceptable, and it was inseparable from the search range of ground radar anyway.
However, the improved J-7F has strong independent combat capabilities, but its short legs are more restrictive.
On the other hand, with the sudden addition of fire control radar, a large power consumer, the power supply capacity of the engine has also become relatively tight.
So after seeing the fantastic performance data of the Turbojet 14 during the day today, Lu Yuying’s first thought was——
Gotta find a way to fit it on my plane!
"The size and weight of the Turbojet 14 are smaller than those of the Turbojet 13, so there is no problem in installing it." Chang Haonan thought for a moment and then replied:
"But The flow rate of the new engine is larger, and the boost ratio has nearly doubled, so the original air intake design may need to be adjusted a bit, and because the weight of the rear part has become lighter by almost 100 kilograms, it also needs to be readjusted. The center of gravity of the entire machine."
"Well..." Lu Yuying lowered her head, flicked the goblet in her hand, and at the same time calculated the current project progress and the time points to be grasped in her mind:
“It’s not difficult to adjust the center of gravity. After all, it’s getting lighter, not heavier. Just add some fuel to the tail.”
"But according to the design method you proposed to integrate the air intake and the cone front body, if we want to change the design of the air intake, I am afraid that it will affect the whole body, and the workload will be huge."
"When we received the Pakistani delegation before, we had promised to complete the first flight before June next year. I am worried..."
Hearing this, Chang Haonan also frowned slightly.
There are only eight months left, and even considering the production of the prototype, it doesn’t seem to be particularly stressful.
“At what stage has the J-7F project progressed now?”
"The design of the original plan has basically been completed, and a J-7B aircraft has been found to prepare for modification. It was originally expected to start at the end of this month."
"Then..."
Chang Hao Nan Gang wanted to speak, but was interrupted by Lu Yuying:
“If it was just a general engine model change, there would be enough time, but after all, the core engines of the Turbojet 14 and the Turbojet 13 are completely different. The 611 Institute has never come into contact with this model before and knows nothing about its air intake characteristics.”
The matching of the engine and the air intake is a quite complicated problem. If a new engine is inserted, the performance will be affected at least, and the failure rate of the engine will be greatly increased at worst.
Of course, this is also related to the design level of the intake duct and the stable working range of the engine.
The more positive examples are MiG 23 and F16. The former can be matched with AL21 and R29-300 engines, and the latter can be matched with F100 and F110 engines.
The typical opposite is the TF30 above the F14.
The performance of this engine on the F111 fighter-bomber is not satisfactory, but after it is installed on the F14, it is disgusting. Coupled with the variable-sweep wing design that has explosive reliability, the total number of The 632 F14 crashed as many as 144 during its service life, making it the second generation widow machine after the F104.
So Lu Yuying’s worries are not unreasonable.
"It would be great if there was someone who is familiar with both the Turbojet 14 and all aspects of the J-7F's performance to help."
After saying the last sentence, Chang Haonan finally understood.
Good guy, so you were waiting for me?
What does it mean to be “a person who is familiar with both the turbojet 14 and all aspects of the J-7F’s performance”?
Just give me your ID number and that’s it.
"Mr. Lu, your speech art is really superb." Chang Haonan's tone made it difficult to tell whether he was really expressing his appreciation.
“Hey, I’m not just talking nonsense.”
The face of Lu Yuying on the opposite side did not change. Ever since he failed to rob someone last time, he realized that When doing this kind of thing, being thick-skinned is king:
“In June, I went to see Lao Du, and he said that you had already started to participate in the August 3rd Project, so after all, you have to be careful. First come, first served, we can’t say anything else.”
"But now, I think the August 3rd Project should be almost over..."
Obviously, he has figured out everything.
In fact, this is exactly what Chang Haonan himself is considering.
The first stage of Project 11 is that Factory 112 uses large parts produced by the Gagarin Aircraft Factory for final assembly of the aircraft, and Institute 601 translates and transforms the design data provided by the Sukhoi Design Bureau .
This process does not require Chang Haonan's help, so he is indeed planning to participate in the No. 10 Project after putting aside the work related to the 83rd Project.
Another reason is that due to problems with the underlying flight control architecture, the J-8C cannot, or does not have time to achieve integrated flight and thrust control. Its aircraft control and engine control are still performed separately.
The J-10 has a real fly-by-wire flight control from the beginning, or a digital fly-by-wire flight control. Although it has not yet realized the integration of flight thrust, it has the potential in this regard, and for Chang Haonan Very ample time.
The J-7F project is obviously a good transitional step.
“There should be no problem if I come to help.”
Chang Haonan’s decisiveness in agreeing surprised even Lu Yuying:
"As for the specific form of cooperation, it will be determined between the 611 Institute and Academician Du. If nothing else happens, it should still be carried out in the form of project application."
"Then it's settled."
The two clinked their glasses together.
Li Xianzhe, who was left standing next to him, watched the whole process almost dumbfounded.
After he learned that Chang Haonan was not an employee of Institute 601, but someone from Beijing Hang University, he didn't think about asking him for help.
But at the moment, Bingcheng really can't come up with any decent projects to attract people.
The Y-12 is just an inconspicuous five-ton small transport aircraft, while the Z-9 has no clear follow-up modification plan.
Even if there is, it is unlikely to be a big project.
Secondly, he didn’t expect that someone would directly grab someone at the dinner party.
Not decent at all.
After Chang Haonan put down the wine glass in his hand, Li Xianzhe began to consider whether he should probe the other party's tone first.
He knows that Bingcheng has an ambitious 10-ton tri-service general-purpose helicopter plan. Although it can be said that the eight characters are not yet revealed, it can still be used to draw conclusions.
If the other party is interested, you can consider fighting for it after you go back.
Hafei Automobile has been selling very well in the past two years, and there is still some idle funds...
The more Li Xianzhe thought about it, the more he felt it was worth a try.
However, when he turned his attention to Chang Haonan again, he found that there was another person standing in front of him.
“Huh?”
(End of this chapter)