Chapter 974 It's ugly
Mr. Huang didn't have much doubts about his words because he knew that Gao Zhendong was very accomplished in aircraft aerodynamic design. The porcelain flight factory used the old attack-5 to change the Battle-7, which was because he gave a lot of aerodynamic appearance design guidance. The theoretical data was taken out for dozens of pages.
Gao Zhendong is not prepared to play too many fun tricks on the MiG-21 at this stage. This is an interceptor, with a speed and altitude meeting standards, a good radar, can carry missiles, and the combat radius is consistent. It can be increased with limited improvements and costs.
After all, in the last Air Force equipment planning meeting, in the third-level and third-type set, the MiG-21 imitation type positioning is a pure interceptor. Moreover, Gao Zhendong is very clear about how fast the Air Force equipment will develop in the next twenty years, and it is not worth investing so much in this thing for the time being.
For a long time, relative to the north, our Air Force could not have an offensive situation. The combat radius was large and it could not be out, and for other directions, it was enough to be smaller.
Moreover, the actual combat radius of interception operations is somewhat different. Interception operations are more about guidance. The high-high-high cross-section flies over, and then they leave after firing the interceptor bullets. The consumption of tangle, patrol, standby, etc. is very small. There is no need to leave one-third of the range to count air combat time. Moreover, the high-high-high cross-section is the most fuel-efficient.
The combat radius of many Russian interceptors was calculated so much, flying over high, throwing missiles, and turning around.
Mr. Huang looked at the picture drawn by Gao Zhendong and looked at it while savoring it. He felt that although this thing looked ugly, it was even more ugly than the F-8, because the shape and proportion of the air intake of the F-8 jaw looked more harmonious than this, and the one drawn by General Manager Gao was pure and vast.
However, if you put aside aesthetics and only look at it from the perspective of function, this air intake ensures a basically consistent air intake with the MiG-21. At the same time, the radar vertebrae on the upper end does not destroy the overall aerodynamic shape, and the diameter is quite large.
The forward-extended air intake lip looks a little ugly, but it is helpful for air intake efficiency. At the same time, this position can also ensure air intake efficiency at a large angle of attack.
The most important thing is that this does not seem to have much changes to the intake duct, except for the head part. As long as the intake lip part of the nose is properly designed to ensure the intake efficiency, there is no need to change anything in the rear part, which is much smaller than the intake change on both sides.
Considering the optimistic level of Northeast Aviation and Development's thrust to increase by at least 10%, the original flight performance is still relatively optimistic under the modification of this nose.
Thinking of this, Mr. Huang felt that this ugly nose looked a little good, at least very cute.
No, right? I must have had a problem with my head. This thing is pure and ugly. Mr. Huang shook his head, as if he wanted to make himself clear. He was fighting hard between his aesthetic conscience and practical technology.
Dry frames are dry frames, but they still have their judgment and sensitivity to technology. This path can be done! And the cost is relatively small.
In Mr. Huang's opinion, this business is still very cost-effective.
"Well, Chief Engineer Gao, we will go there this path, I think it will work."
"This design may have a greater impact on extreme speed, but it has no effect on cruising speed. As an interceptor, cruising speed is also very important."
The faster the speed, the more violent the increase in air resistance, and the greater the impact of changes in aerodynamic appearance on speed. Therefore, Gao Zhendong said that extreme speed may have an impact, and there is no problem with cruising.
The cruise speed determines how long this interceptor can reach the interceptor position, and the extreme speed is not used to rush. The fuel consumption rate of the MiG-21's R-11F-300 engine is 2.5 times the fuel consumption rate of the intermediate thrust state. In addition, the acceleration process, it is actually impossible to fly at a very fast speed for a few minutes, so it is obviously inappropriate to use it to rush.
"Well, but if the thrust on the Aerospace Engine Institute can really increase by 10%, I think the problem is not too big, I will do it!" Mr. Huang also had his own judgment, which was basically the same as Gao Zhendong.
"That's fine, but I think there is a place for this plane to be modified."
Oh, this sentence is very serious. Mr. Huang was very energetic: "Which one?"
"Must", even if the air intake method is changed, General Manager Gao didn't use this word just now.
Gao Zhendong pointed to the information brought by Mr. Huang, the nose part of the MiG-21 line chart: "Ejection seat! Or the entire ejection escape system."
"Ejection seat? This ejection seat looks very well designed. In order to prevent the oncoming airflow ejected at high speed from harming the pilot, a special design of a disengagement ejection is designed to protect the pilot with a canopy cover. The canopy cover will be abandoned only after the airflow stabilizes. It looks pretty good."
I have to say that the Russians seem to be caring and considerate, but the problem is that they are a bit beyond the scope. Their subsequent ejection seats are very good, but they do not include the MiG-21F.
Gao Zhendong shook his head: "This set of actions looks good, and it seems to be well protected, but there is a biggest problem. I just looked at the information here. This system is too complicated and has too many links, so it is easy to have problems. Moreover, I have a relatively conservative attitude towards the automation system of the Russians. Believe me, this set of things is really easy to cause trouble." This system is known as a "living coffin" in the army, and it must be changed!
Gao Zhendong's words shocked Mr. Huang. It was not the explanation of the previous problem, but the last sentence. He knew that Gao Zhendong is currently the top automation technology expert in China. Many of his comrades in their institute are still holding raw chewing books, just three words - "It's too difficult."
This kind of top technical experts must carefully consider the judgment of a specific system.
"Is it really that serious?" I was just digesting and absorbing it before, and I haven't started to conduct actual debugging tests. It is not clear what the system is going to be used.
"Really, in this way, I suggest that you import some ejection seats from the Russians and place them on the simulated cockpit rocket push test stand for a complete test, and do it a few more times. This is related to the life of the pilot, so it is not too cautious." Gao Zhendong's face was very serious at this moment.
The simulated cockpit rocket pushing test bench sounds quite a complicated name, but Mr. Huang understood what it was when he heard it, even if he didn't know about it before.
"Well, okay, I'll go back and arrange this. If it's true, then the problem will be serious." This thing is originally the last layer of safety guarantee for Comrade Pilot. If something goes wrong with this thing, let alone during wartime, even in daily training and patrols, it may pose a serious threat to the life of Comrade Pilot.
"But without this cockpit protection, we have to consider how to deal with the high-speed airflow during ejection." He raised a new question casually, which was discussed by each other, not that he couldn't think of it. We have come here. Since we have found a problem, let’s discuss it together.
"I think the pilot's anti-duty suit, compensation suit, and flight helmet can actually play a sufficient protective role. As long as the ejection is fixed well enough. In this regard, it can be comprehensively tested on the rocket test bench and combined with medicine, it can be determined." Gao Zhendong did not take on the big deal, but he made his subtext clear. In fact, most of the later ejection seats did not have these fancy functions.
Speaking of this, Gao Zhendong remembered that the ejection seats we improved in the early days were actually average. He paused and still put forward his suggestions: "I suggest you find the Defense Working Committee to see if you can import some Gallic people, or even John's Cow, to learn from them. We still have a gap in the Gallic people and John's Cow."
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The Martin Baker ejection seat of John Bull is really good. If you can get it, you have to copy it.
Mr. Huang laughed. Mr. Gao's thinking was really open-minded. He actually put his ideas on the heads of the Gaul chicken and John's cow.
"Okay, let's talk about this matter with the Defense Working Committee. Mr. Gao, you are the founder of the application of domestic wing body integration technology. Do you think this technology is suitable for our aircraft?"
This question is also very interesting to him. After all, the benefits of attack-5 changing to war-7 can be seen with the naked eye.
Gao Zhendong nodded and shook his head: "This depends on the progress. If the copying is too late, it can be used. If the progress is delayed for too long, I suggest you don't use it."
Not necessarily used? This is actually a bit beyond Mr. Huang's expectations. Generally, the founders of a new technology tend to promote their own technology as much as possible.
"But in this case, the range of this MiG-21 is really..." To be honest, the combat radius is not high, and the combat radius of the MiG-21 is also a bit ugly, especially the low-low-low serious air combat radius, which is indeed not very good-looking.
Even if he is an interceptor, Mr. Huang hopes that what he has made can have more functions and can take into account other combat tasks.
"If the wing body fusion is too late or the effect is not good, we have other solutions." Gao Zhendong said. After saying that, he opened the MiG-21 line chart brought by Mr. Huang.
"Mr. Huang, look here, this wing fuel tank has the potential to expand. Let's install more oil in the wing..."
Mr. Huang looked at his hand, thought carefully for a while, then nodded: "Well, there is indeed potential here..."
At this moment, he was surprised and convinced. Mr. Gao watched for a while, and he was still talking while watching, and he had already found a place where the original design could tap potential. This skill is really amazing.
You should know that the space on the line diagram that looks empty may actually be arranged with equipment, which cannot be seen on the line diagram. Mr. Gao can tell that there is potential there just a few glances. That is to really have a deep understanding of the fighter structure to achieve it.
(This chapter ends)