Chapter 1127 Trent 900, first flight!

Everyone likes to hear compliments.

Casore is no exception.

Although he guessed based on his intuition and the difference in length between the two sentences, the other party might not have meant this at first.

But in the end I decided to accept the latter statement.

After all, according to common sense, there shouldn't be too much difference.

Moreover, at this critical juncture, it is not the time to dwell on these minor details:

"I could go back to France, but..."

Casore looked at the design in front of him and hesitated for a moment:

“Although the pre-connection process is not unfamiliar to our workers, it has never been tried on workpieces of this size and characteristics before, and there is not much time for trial and error this time, so your process needs to be very stable…”

"Don't worry, we will provide the parameters directly, you just need to follow them..."

Liang Shaoxiu answered, but soon seemed to remember something and re-emphasized:

“The only thing that needs to be noted is that in addition to the process problems within the unit, the process-related problems caused by the gap flow between units must also be considered, which was not included in the previous pre-connection process…”

"For example, between these two units, for unit 1, the left side of the wall panel is the positioning reference, and all degrees of freedom on the left side of the skin and the long stringer with manufacturing errors are constrained, and all degrees of freedom on the right side except the z direction are also constrained. However, due to the influence of many factors such as part manufacturing errors and positioning errors, the application of pre-connection to reduce the gap of unit 1 will cause the gap to flow to unit 2 and increase the initial gap of unit 2..."

"..."

Cassore suddenly felt that he seemed to not understand something.

In fact, this is normal.

Because many of the relevant technical terms were created by Chang Haonan based on his past life experiences, or were even completely made up.

It is barely understandable in the Chinese context, but after being simply and roughly translated into English by Liang Shaoxiu, it does seem rather abstract.

Fortunately, he just briefly introduced the concept, and it was impossible for him to talk about the specific design methods casually with a foreigner like Casore.

Otherwise there will be more linguistic obstacles...

In short, a week later, Casore boarded the chartered flight back to France with the first set of process technology solutions provided by Liang Shaoxiu.

As for other subsequent plans...

Because time is too tight, we can only design while producing.

The painter was ecstatic.

……

Although Dassault Group's headquarters is in Paris, in order to specialize in the production of its two flagship products, the new generation of Falcon series business jets and Rafale fighter jets, they still located their new factory in Toulouse, the holy land of the French aviation industry.

That’s right, together with Airbus, Socata, ATR, Snecma, ONERA and many other heroes, they form the Toulouse Aviation Industry Zone.

Therefore, Casore did not even return to Paris, but flew directly to Franchare Airport with a group of entourage.

Compared to the famous Blagnac International Airport, this place used to be the base of the French 1st Airborne Training Regiment, so it is much smaller in scale.

There is only one runway, but fortunately it has been extended and can barely accommodate aircraft of the A330/340 level.

But due to its advantage of not being open to the public, it is a very important place for aviation companies in Toulouse, especially aircraft manufacturers.

Needless to say, companies like ATR and Socata that produce small aircraft almost all use this place as their base.

Even Airbus often conducts test flights or ships parts here.

After Dassault's new factory was built, considering that some military aircraft tests were difficult to conduct at civilian airports, it also obtained partial use rights here.

However, before the charter plane that Casore was on landed, he noticed in mid-air that there was a large four-engine passenger plane parked on the apron next to him.

It looks like an Airbus A340.

But not quite.

As the internationally renowned 5APU, the A340's four engines are quite small compared to its overall size.

But now, even from a distance of several thousand meters, it was not difficult to see that on the inner side of the left wing of the plane, there was a huge machine with a diameter almost twice that of the other three machines...

Meanwhile, on the airport grounds.

Charles Champion and Tim Bodie were standing side by side not far from the plane, watching a group of technicians conduct the final checks before takeoff.

Although there were some twists and turns in the process, fortunately the problems were solved quickly and did not have too bad an impact on the ground testing work of the Trent 900.

Finally, the installation was completed in early February 2004, and two rounds of successful ground taxi start tests were carried out three days ago.

And today is the first day that this model will go into space.

“In fact, at the beginning, many users felt that your aeroengine design was a bit too radical and hoped to use the Engine Alliance model in the first batch of delivered products.”

Champein suddenly spoke up.

As a European company, Airbus cannot be overly biased for commercial reasons, but at least for him, he would like to see Rolls-Royce models become mainstream.

Bodie sneered disdainfully:

“If the technology is not radical, how can we achieve such leading performance now?”

That being said, even though the incident had already passed, Bodi was sweating profusely on his back.

In fact, the design of the Trent 900 is too radical.

This resulted in large-scale process callbacks and a testing accident that almost destroyed the entire model.

Of course, the latter is not strictly speaking directly related to design.

The company that produced the unqualified oil pipe has been permanently blacklisted by Rolls-Royce and replaced by three other unnamed suppliers.

In short, if we hadn’t been so lucky to find foreign aid, the competitor GP7200 might have really overtaken us…

"That's true..."

Champine nodded:

"To be honest, the fuel economy and quietness of the Trent 900 are indeed the best I have ever come across in my career..."

"Of course."

Bodie involuntarily straightened his back a little:

"Not only that, in terms of pollutant emissions, although the Trent 900 is expected to go into production before the end of 2005, it still meets the CAEP6 emission regulations... This is something that many models currently under development have not achieved."

According to ICAO regulations, engines put into production after 2004 will use CAEP4 emission standards, while the more stringent CAEP2008 will not be implemented until after 6.

In fact, the "many models" he mentioned were not that many.

It's just targeting GP7200...

While the two were talking, the Dassault charter plane that was preparing to approach the airport in the air had already landed smoothly on the runway.

Since there are no annoying commercial flights here, the rest of the day belongs to Airbus and Rolls-Royce.

Soon, with a crisp bang from the real APU, the A341 numbered 340 successfully started all four engines.

A low roar then reached everyone's ears.

As an aerial test platform, the aircraft's No. 2 engine can be controlled individually by testers in the cabin, so it remains at idle speed.

The other three carefully controlled the thrust to allow the aircraft to slide smoothly out of the parking position.

In order to ensure takeoff safety, large aircraft taking off from Franchard Airport need to back up a distance and reach the end of the runway before they can start accelerating.

For platform 341, there is an additional step.

Just wait for the speed of engine No. 2 to slowly reach the standard.

As a test prototype, it certainly cannot be handled as roughly as a production model.

Also, there are some subjects that need to be completed in this process.

At the same time, inside the cabin.

Jin Xu was sitting in a position that was somewhat remote from the surroundings, observing the entire situation inside the plane.

According to the agreement reached between Rolls-Royce and Aero Engine Corporation of China, he will participate in the entire platform flight test of Trent 900 as a technical consultant.

He became the only Asian staff member on the entire plane.

Of course, according to industry practice, he could only watch and not interfere.

But that's enough.

The reason why Chang Haonan sent him here was to fully understand EASA's standard procedures for civil aircraft engine testing and to prepare for the subsequent design and production of AE1500.

Therefore, Jin Xu didn't even want to blink at this moment, for fear of missing some details.

About ten minutes later, several pre-takeoff tests were completed, and the speed curve of the No. 60 engine also reached about % -

After all, it is a model with greater thrust. If it is used at full capacity, the No. 1 engine on the same side will need to reduce thrust for balancing.

After making sure the speed was stable, an engineer nearby picked up the radio:

"Engine No. 2 is ready for takeoff!"