Chapter 90: Improving Turbojet 14!

"Attending the Paris Air Show?"

Yi Yuanhe raised his head again and looked at Chang Haonan.

Paris-Le Bourget International Air & Space Exhibition, the world's largest, most prestigious and oldest international aerospace exhibition.

For China Airlines 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 the technical level is relatively backward.

In general, it's all about participation.

"That's right, and it's not just about participating, if you can reach a cooperation with the Italian side, even if it's just a nominal cooperation, then it's completely conditional to apply for a live air show."

After saying this, Chang Haonan noticed that a trace of essence flashed in Yi Yuanhe's eyes.

Obviously, the other party has already been moved.

Therefore, Chang Haonan continued to pursue with victory:

"And, if successful, it will be the first time that a domestically produced aircraft will perform a flight show at a large-scale air show, which will help both for obtaining an airworthiness certificate from the European Aviation Safety Agency (EASA) and for entering the European market in the future."

Yi Yuanhe's breathing suddenly became heavy.

As an old engineer, he knew very well that Chang Haonan was painting cakes.

A prototype has just completed its first flight, and he is already thinking about seizing the European market......

But knowing that he knew, Yi Yuanhe still couldn't help but seriously think 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 beginning of the 90s to the end of the 2008 Olympic Games, a very important, if not the most important, theme of China's foreign exchanges is to "show its own image".

This matter will feel completely redundant in the 20s of the 21st century before Chang Haonan's rebirth, but if you look at the reality at the turn of the century, it is actually necessary.

In this context, it is the "first time" for an aircraft designed and manufactured by Huaxia to perform a flight show in a core European city like Paris.

It is definitely enough to put Yi Yuanhe, or at least the MA60 project, in the annals of history.

On the other hand, EASA's airworthiness certification is a very important thing.

Aircraft models that have not obtained an airworthiness certificate cannot be registered and operated in the corresponding area.

However, aircraft manufacturing itself is a highly monopolistic and highly protective industry, and neither the United States nor Europe will casually let you pass the airworthiness certification.

After all, these standards themselves are part of the monopoly barrier, and naturally they cannot be easily broken.

Until Chang Haonan crossed, there was only one small aircraft in the whole of China, the Y-12F, which had been recognized by the FAA.

As for EASA, it is even more of a passing model.

This has had a significant impact on the commercial performance of the ARJ21 and C919.

And now, the course of history has changed slightly because of the existence of Chang Haonan, a butterfly.

The original MA60 could not compete with the ATR42 at all.

In 1996, both Europe and the United States generally had a relatively contemptuous attitude towards China.

This is not a bad thing to some extent, because it is easier to make a fortune quietly, and do things that you can't do more than 20 years later.

For example, through cooperation with Italy, the joint of EASA airworthiness certification has been opened.

It even goes a step further to promote the mutual recognition between the upcoming CAAC airworthiness certification standard and the EASA standard.

If this thing can be successful, then as long as a model is certified by Huaxia, it will automatically be deemed to have passed the certification of the European side.

Solve the problem almost once and for all.

After all, as the saying goes, first-class enterprises do standards, second-rate enterprises do brands, and third-rate enterprises do 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 the process with his own help.

These things, as an old aviation man, Yi Yuanhe can naturally think of them.

Although he is the chief engineer of the MA60, he cannot decide things outside the project.

"I need to discuss this matter with Comrade Zhou Yonghang."

Yi Yuanhe stopped: "However, no matter what the result is, Comrade Chang Haonan, I think your suggestions are very valuable. ”

After saying that, he turned around and walked in the other direction.

He struggled to control his expression so as not to show his joy and eagerness in front of these young juniors.

But the much brisker pace under his feet still revealed his true thoughts.

Walking side by side, only Chang Haonan and Liu Hongbo were left.

After Yi Yuanhe left, the two didn't know what topics to talk about for a while.

The matter of the new boat 60 has just been almost talked about, and the nature of the 83 project is different, so it is obvious that it cannot be talked about so casually.

In the end, it was Liu Hongbo who took the lead in breaking the silence.

"I sometimes feel like you're a monster."

He looked up at Chang Haonan and shook his head slowly: "When I saw Senior Sister Yao at Teacher Du's place the year before last, I felt that it was almost the limit, but it turned out to be ......."

"What is this...... Chang Haonan smiled slightly: "Maxima often has, but Bole does not often have it." ”

Liu Hongbo's mood suddenly improved a lot.

"Maybe I should apply for an extra class next semester?"

He thought.

……

Chang Haonan did not stay in Yanliang for too long, the comrades who inspected the prototype of No. 01 moved quickly, and the power joint research team flew back to Shengjing by plane early the next morning, leaving only a few people to deal with some less important follow-up work.

Yang Fengwan did not hold another large-scale meeting this time, but only gathered several people, including Chang Haonan and Yan Zhongzhong, in a small conference room.

"Has the problem been clarified?"

"Got it." Yan Zhongzhong nodded:

"In the case of a large flow channel in the transonic range, due to the rapid retraction of the throttle lever, the afterburner supply of the engine decelerates sharply, resulting in a larger engine drop pressure ratio."

"The engine violently throttles the high-speed compressed gas at the compressor, and the instantaneous compressed gas is strung in the form of a shock wave, congesting the inlet air flow channel and the engine compressor flow channel, and the abnormal flow separation begins from the two-stage high-pressure rotor, and then expands to the entire compressor, resulting in a rapid reduction in compressor efficiency and surge."

"So...... Are you sure it's a design issue? ”

"Yes." Yan Zhongzhong nodded solemnly.

Failure to conduct a full high-altitude platform test on the ground will eventually lead to hidden dangers.

And now, the hidden danger has become an accident.

A long silence ensued.

"I need a serious answer to the next question." Yang Fenghat's eyes swept over the few people in front of him like an arrow:

"Turbojet 14, is there still a chance to catch up with the progress of the design of the 83 project?"

There was silence again.

"Although we have found the location of the surge, which is the starting point for the next step of design optimization, according to common sense, I am afraid that it will take at least half a year or so, unless it is ......."

Yan Zhongzhong'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 great help."

The helmsman's plus change was in the afternoon as usual

(End of chapter)