Chapter 90 Improved Turbojet 14!
"Participate in the Paris Air Show?"
Yi Yuanhe raised his head again and looked at Chang Haonan.
Paris-Le Bourget International Aerospace Exhibition, the largest, most prestigious and oldest international aerospace exhibition in the world.
For Chinese aviation people, the Paris Air Show is not unfamiliar. In fact, as early as the 37th Paris Air Show in 1987, the aviation industry sent a delegation to participate.
However, most of the exhibits are models, and their technical level is relatively backward.
In general, the focus is on participation.
“That’s right, and it’s not just participation. If we can reach cooperation with Italy, even if it is just a nominal cooperation, then we are fully qualified to apply for a real aircraft flight show.”
After saying this, Chang Haonan noticed a glint in Yi Yuanhe's eyes.
Obviously, the other party has been persuaded.
Therefore, Chang Haonan continues to pursue victory:
“And, if successful, this will be the first time that a domestic aircraft performs a flight performance at a large-scale air show, both for obtaining airworthiness from the European Aviation Safety Agency (EASA) It proves that entering the European market in the future will be helpful.”
Yi Yuanhe’s breathing suddenly became heavy.
As an old engineer, he knew very clearly that Chang Haonan was trying to draw a cake.
A prototype model has just completed its first flight, and he has already planned to seize the European market...
But knowing that he knew it, Yi Yuanhe still couldn't help but start to think seriously about the possibility that the other party had just said.
After all, this cake is so delicious.
Looking at the other party's expression, Chang Haonan knew that he had succeeded.
From the 1990s until the end of the 2008 Olympic Games, a very important, and even the most important, theme of China's foreign exchanges was "showing one's own image."
This matter would feel completely unnecessary in the 2020s before Chang Haonan was reborn, but if viewed in light of the reality at the turn of the century, it is actually very necessary.
Against this background, it is "the first time" for an aircraft designed and manufactured by China to perform a flight demonstration in a core European city like Paris.
It is definitely an achievement that is enough to put Yi Yuanhe, or at least the MA60 project, in the history books.
On the other hand, EASA’s airworthiness certificate is even more important.
Aircraft models that have not obtained airworthiness certificates cannot be registered and operated in the corresponding area.
However, aircraft manufacturing itself is a highly monopolized and highly protective industry. Whether it is the United States or Europe, they will never let you pass the airworthiness certification casually.
After all, these standards themselves are part of the monopoly barriers and cannot be easily broken through.
Until Chang Haonan traveled through China, there was only one small aircraft in China, the Y-12F, that had been certified by the FAA.
As for EASA, there is not even a single approved model.
This has greatly affected the commercial results of ARJ21 and C919.
Now, the course of history has changed slightly because of the existence of Chang Haonan, the butterfly.
The original MA60 was completely unable to compete with the ATR42.
In 1996, Europe and the United States generally had a relatively contemptuous attitude towards China.
This is not a bad thing to a certain extent, because it is easier to make a fortune silently and accomplish things that would not be possible in the next twenty years.
For example, through cooperation with Italy, we can open up the joints of EASA airworthiness certification.
Even going one step further, promoting mutual recognition between the upcoming CAAC airworthiness certification standards and EASA standards.
If this matter is successful, then as long as a model is certified by China, it will automatically be deemed to have passed European certification.
Almost solves the problem once and for all.
After all, as the saying goes, first-rate companies make standards, second-rate companies make brands, and third-rate companies make products.
The same is true between countries.
From Huaxia products, to Huaxia brands to Huaxia standards, it took almost 40 years on the original timeline. Now, Chang Haonan hopes to speed up this process with his help.
As a veteran aviation man, Yi Yuanhe can naturally think of these things.
But the matter is big. Although he is the chief engineer of MA-60, he cannot decide matters other than the project.
“I need to discuss this matter with Comrade Zhou Yonghang.”
Yi Yuanhe stopped: “However, no matter what the outcome is, Comrade Chang Haonan, I think your Suggestions are valuable. ”
After saying that, he turned around and walked in the other direction.
He tried hard to control his expression to avoid showing his joy and eagerness in front of these young juniors.
But the pace that was much lighter than before still exposed his true thoughts.
The only two people left walking side by side were Chang Haonan and Liu Hongbo.
After Yi Yuanhe left, the two of them didn't know what to talk about for a while.
The matter of MA-60 has just been discussed, but the nature of Project 83 is different, so it is obvious that we cannot talk about it casually.
In the end it was Liu Hongbo who took the lead in breaking the silence.
“Sometimes I feel that you are simply a monster.”
He looked up at Chang Haonan and slowly shook his head: “I met Junior Sister Yao at Teacher Du’s place the year before last. At that time, I felt that it was almost the limit, and the result..."
"Is this..." Chang Haonan smiled slightly: "Thousand-mile horses often exist, but Bole does not always exist."
< br>
Liu Hongbo's mood suddenly improved a lot.
“Maybe I should apply for one more course next semester?”
He thought.
......
Chang Haonan did not stay in Yanliang for too long. The comrades who inspected the No. 01 prototype moved very quickly. The power joint research team took off early the next morning. The plane flew back to Shengjing again, leaving only a few people to deal with some less important follow-up work.
Yang Fenghao did not hold another large-scale meeting this time, but gathered several people, including Chang Haonan and Yan Zhongcheng, in a small conference room.
“Has the problem been identified?”
“It has been identified.” Yan Zhongcheng nodded:
“The large flow channel of the engine in the transonic range In this case, due to the rapid retraction of the throttle lever, the engine's fuel supply decelerates sharply, causing the engine drop pressure ratio to become larger. "
"The engine will violently throttle the high-speed compressed gas at the compressor, compressing the gas instantly. It travels up in the form of shock waves, congesting the inlet flow path and the engine compressor flow path. Abnormal flow separation starts from the secondary high-pressure rotor, and then spreads to the entire compressor, causing the compressor efficiency to rapidly decrease and surge. "< br>
"So...are you sure it's a design problem?"
"Yes." Yan Zhongcheng nodded with a serious expression.
Failure to conduct a complete high-altitude test on the ground will eventually bring hidden dangers.
Now, the hidden danger has turned into an accident.
A long silence followed.
"I need a serious answer to the next question." Yang Fenghao glanced at the people in front of him like an arrow:
"Turbojet 14, is there still a chance to catch up with the 83 Engineering Design The finalization progress?”
There was another silence.
“Although we have found the location where the surge occurs, which is the starting point for the next step of design optimization, according to common sense, it will probably take at least about half a year, unless...”
Yan Zhongcheng’s voice was a little dry, and then he raised his head and glanced at Chang Haonan next to him:
"I think Comrade Xiao Chang should be able to provide a lot of help."
The helmsman's update will be in the afternoon as usual
(End of this chapter )