Chapter 258 A unique aviation knowledge answering competition
More than half an hour later.
The belated Zhan Jifeng finally arrived.
Jiang Chen saw that his hands were ‘empty’, and a hint of doubt suddenly appeared on his face.
Huh?
Didn’t we talk about a mysterious grand prize?
What about the mysterious prize?
Missed?
But others were very excited about Zhan Jifeng's arrival.
Because in the past half hour or so, they have looked at the two J-10B fighter jets parked on the apron several times, inside and out, and also went to the flight deck next to the apron. We played cosplay for a while in the briefing room.
Rao is a rookie who is interested in the J-10 Raptor.
At this moment all curiosity is satisfied.
The reason why they are still patient and have not clamored to go back to school.
Aren’t you just thinking about the aviation knowledge answering contest and the mysterious grand prize that Director Zhao mentioned?
Now the Chief of Staff is here.
The mysterious grand prize will be unveiled soon.
"Haha." Zhan Jifeng said with a smile before he walked into the tarmac, "I blame me, I forgot about other things when I got busy, and made everyone wait for a long time."< br>
Sun Zhigao and Director Zhao hurriedly greeted them and smoothed things over, saying, "It's okay, it's us who are troubling the chief."
Zhan Jifeng nodded towards them,
Then he walked up to all the students.
He said loudly, "Director Zhao has already told you just now. In addition to listening to war history and touching fighter planes, this afternoon there is also the most important thing, which is the aviation knowledge answer competition."
"But don't be nervous, This is just a little game I made up on the spur of the moment. "
"So there are no strict requirements or rules for this knowledge competition. I just ask questions and you raise your hands to answer."
"Whoever answers quickly and accurately will win a mysterious grand prize that I will personally give away."
"As for what the mysterious grand prize is, haha, you will know it in a while."
More than two hundred students present listened.
There was an eager expression on their faces.
Zhan Jifeng saw this.
No more wasting saliva.
Instead, he stood on a ladder and looked down at the crowd.
He opened his mouth and said, "Then let's have an appetizer first. What is the maximum overload limit of the J-10 series fighter jets."
It is indeed an appetizer.
He just finished asking.
At least one-third of the more than two hundred students present raised their hands at the same time.
Sure enough.
No one who can pass the exam is a fool.
Although this group of students had just enrolled in school, and what Zhan Jifeng asked was not at all about the teaching content of this semester.
But still at least one-third of the students know the correct answer.
Zhan Jifeng swept around.
The eyes finally fixed on Fu Shiyu’s face next to Jiang Chen.
Pointing at her, he said, "For the first question, I will choose between a dozen female classmates. Our male classmates will also show their style."
"That girl, you answer it."
Fu Shiyu was immediately overjoyed.
Without thinking, he immediately said, "9 G's."
Zhan Jifeng nodded, "The answer is correct."
Listening to what he said, everyone around him was shocked. He immediately cast an envious look at Fu Shiyu.
“Next question.” Zhan Jifeng asked again, “What is the most accurate official definition of the J-10?”
This question is a bit difficult. However, the degree of difficulty is not great.
Many students still raised their hands.
Zhan Jifeng randomly called a boy's name. The boy stood up with excitement and blurted out, "A single-engine, single-vertical tail 10-ton light air superiority multi-purpose fighter aircraft."
"The answer is correct. "
"The third question is, what is the maximum ceiling of the J-10?"
"18,000 meters" someone immediately answered.
Zhan Jifeng saw this.
While I recognized this group of students, I also decided to increase the difficulty level.
“As we all know, the J-10b is an improved version of the J-10a. The engine of the J-10b is the latest version of the AL-31FN, with a thrust of 13.5 tons. Since the thrust of the engine has increased, why does the J-10b have an improved engine? Has the 10b lost weight compared to the original machine?" Zhan Jifeng asked.
Ugh!
This question immediately confused most of the students.
Jiang Chen looked around.
I noticed that I didn't raise my hand.
So I raised my hand for the first time.
Zhan Jifeng saw Jiang Chen in the crowd raising his hands above his head.
I suddenly felt happy.
You boy!
Finally I couldn’t hold it any longer.
Without any hesitation.
He immediately called Jiang Chen's name, "That boy named Jiang, you are the only one who raised your hand, so let you answer this question."
The boy named Jiang Boy?
Do you know me, Chief of Staff?
However, Jiang Chen didn't think much about it and answered, "Because weight control is one of the extreme core issues in aircraft design."
"Tell me more details." Zhan Jifeng was not satisfied with his answer. satisfy.
“In order for an aircraft to overcome gravity and fly in the sky, it needs to generate upward lift through the pressure difference generated by the air flowing at different speeds on the upper and lower surfaces of the wing, and this process will be accompanied by various forms of resistance.”< br>
“The greater the weight, the more lift the aircraft needs to generate – which will inevitably cause a substantial increase in drag.”
“On the other hand, after the engine thrust overcomes the flight resistance of the aircraft, The remaining thrust becomes smaller and smaller, but the mass of the aircraft increases; referring to Newton's second law F=MA, we can know that this will inevitably lead to a reduction in the aircraft's acceleration and climbing capabilities."
"This kind of thing. Double negative impact, for the design of any aircraft, from the initial basic layout type and rough size selection, to the later detailed design and various improvements after finalization; how to ensure that the functions and performance do not shrink Reducing weight as much as possible under certain circumstances has always been a concern for aircraft design units.”
“As various domestic composite materials processes gradually mature and are widely used, these composite materials are used in applications. The fighter fuselage is also a general trend. "
"The J-10b fighter uses a large amount of composite materials, so its weight is hundreds of kilograms lighter than the original aircraft."
" Don’t underestimate these few hundred kilograms. Not only can the J-10b increase its combat radius, but it can also carry a higher-power fire control radar and longer-range air-to-air missiles, which improves the combat effectiveness of the J-10b fighter. "Leap."
"So it's not that the designer deliberately reduced the weight of the original aircraft, but it is the inevitable result of using new materials in the improved aircraft."
Only then did Zhan Jifeng's face show a look of satisfaction.
He gave him a thumbs up and said, "That's a very good answer. You get full marks for this question."
But he didn't say much.
There was a pause.
The next question was raised.
This unique aviation knowledge answering competition became very exciting from the beginning.
The same sentence.
No one who can pass the exam is a fool.
So general questions have no difficulty level at all for them.
However, as the questions became more and more difficult, more and more people were ‘eliminated’.
The competition lasted for nearly twenty minutes, and there were still more than a dozen people still persisting.
Among them are Jiang Chen and Fu Shiyu.
(End of this chapter)