"Yes, the air intake on both sides can free the nose of the aircraft, but if you take air on both sides, the air resistance will definitely increase, so that the maximum speed of the aircraft will be reduced." At this moment, a man said: "The main purpose of our aircraft design is to intercept the Soviet bombers, and the faster the better." ”

Hearing this, Qin Feng couldn't help but ask, "Who said that?" ”

The nose air intake clearly represents the advanced direction, and Western fighters have long entered the era of air intake on both sides, and after the Soviets MiG-21, all new planes are air intake on both sides.

At this time, there are still people who think that the nose air intake is beneficial?

This theory is too far-fetched.

"Doesn't everyone think so?" At this moment, a person walked in outside, Qin Feng raised his head, and what he saw was Mr. Gu.

"Everyone thinks that the air intake resistance in the nose is small, and our J-8 fighter is mainly for interception operations and interception of Soviet bombers, and the most important thing is speed.

If it came out of the mouth of an ordinary technician, then it would be okay, and now, hearing that Mr. Gu actually said the same, Qin Feng couldn't help frowning, this is a fallacy at all.

Qin Feng originally wanted to hold back, after all, he was a test pilot, and it was inconvenient to participate in the design of the aircraft, but thinking about it, there was such a huge gap with foreign countries, and he didn't catch up now, let alone when.

So, he finally mustered up his courage and said, "Mr. Gu, I don't think the air intake resistance on both sides is great. ”

Qin Feng's words suddenly made Mr. Gu stunned: "What did you say?" ”

"I think that the head air intake resistance is large, this is a hypothetical speculation, that the overall cross-section of the nose air intake is small, of course, the resistance is small, but we ignore that aerodynamics is a complex and profound knowledge, although the overall section of the air intake on both sides is large, but the nose is pointed, just can split the air flow, so that the air flow to both sides of the movement, in this way, the air resistance may be small."

Qin Feng has already thought about these problems, is there a large cross-sectional area, and there is a lot of resistance? Of course not! The nose intake, there is an air intake cone inside, and the airflow goes along the inside of the body, so that the precious outer space in front of the body is used, and the airflow will also rub against the side walls on the inside and outside, bringing greater resistance.

Of course, the specific ones are bigger, and this needs to be tested to verify.

"So, I ask you not to take it for granted that you can make two identical nose models, go through the wind tunnel to verify them, and see which one has less resistance." Qin Feng said.

Mr. Gu's eyes widened, looked at Qin Feng, and said: "Everyone says that you are a technical test pilot, but this time I know better, you don't just know how to fly, when it comes to theory, it's still a set." ”

"Mr. Gu, practice brings true knowledge, let's know through a wind tunnel experiment." Qin Feng continued: "Western fighters eliminated the nose air intake early and changed the air intake on both sides, so this modification must be fully justified, and the nose is equipped with radar, so that we can have a large-caliber advanced radar, so that we can find the target day and night, rain, wind and cloudy days, and now our planes are all day fighters, it can be said that Miss Jiao, not a man." ”

Originally, the air intake on both sides has been realized on the Qiang-5, which is modified with J-6, and now to J-8, the development is actually the nose air intake, which can't help but make Qin Feng a little secretly worried, the gap between home and abroad is too big, and now if you are still hesitating in the nose air intake, how long will it take to develop?

The country can't afford to delay.

"Yes, Mr. Gu." At this moment, Wang Yang also said on the side: "The wind tunnel experiment will not cost too much, we can use the wind tunnel to do an experiment, I agree with Comrade Qin Feng's opinion, the nose air intake is outdated, and the air intake on both sides is the future direction." ”

Not only the J-8, but even our J-7 can find a way to get closer to the air intake on both sides.

"Okay, then I'll say hello to the institute and do an experiment." Mr. Gu also made up his mind.

In the past, when the prototype of the J-8 was built, there were these arguments, and later everyone felt that the nose air intake resistance was small, and it was too risky to engage in air intake on both sides, so the J-8 was still designed as the nose air intake.

Now, as we are about to enter the 80s, we have got the nose model of the MiG-23, and it is time to take a brave step forward.

It's good to be young, young people, only have the motivation and the momentum to break through, Mr. Gu thought in his heart, and at the same time secretly made up his mind, this Qin Feng, he must be transferred to test fly J-8!

Good seedlings, that must be grabbed.

……

The next day, the sky was clear and the weather was good for flying, and when Qin Feng was dressed and walked towards the cockpit, he found that there were many more people on the runway.

In addition to Tu Lao and other people from Factory 132, even the test pilots who I just met yesterday, Wang Yang and other seniors are among them.

Looking at this, Qin Feng couldn't help but smile: "Everyone, you guys are like this, it looks like I'll never go back." ”

After saying this, Qin Feng immediately closed his mouth again, feeling a little remorseful in his heart, even if it was like this, why did he say it again?

Tu Lao also stood in front with a somewhat solemn expression: "Qin Feng, you can't be like before this time, always thinking about protecting the plane in your mind, if something goes wrong with the plane, you have to listen to our orders and jump immediately." ”

Qin Feng nodded and stepped into the cockpit, in the test flight before, there had never been so many people to see him off, and at the same time, Qin Feng's heart was not under any pressure.

The most difficult, the most dangerous inverted flying tail spin, I have changed it myself, this time I am flying, the easiest tail spin subject, what else can I be afraid of?

Test flight tailspin, it looks dangerous, in fact, as long as you correctly grasp the scientific laws, but it is not dangerous, you have to enter the tailspin countless times, change the tailspin, so as to collect a lot of data, for the preparation of the flight outline of the tailspin.

"006 requests to take off."

Buckled the cockpit canopy, Qin Feng heard a familiar rumbling sound from behind, and shouted into the radio.

"You can take off." Captain Li's voice came from inside the headset: "No. 3 airspace, the height is 12,000." ”

"Roger."

The tail of the J-7 II fighter spewed flames, and the fighter slid quickly on the runway before flapping its wings and flying into the sky.

Yesterday, Qin Feng was already thoroughly familiar with the airspace around the test flight institute, and after taking off, he climbed to the right, and when he reached an altitude of 12,000, he had already come to the No. 3 airspace.

"006 has arrived in the predetermined airspace, requested the first subject, level flight stall."

"It's OK to start, pay attention to the height."