Chapter 316 The first ground test of the J-10 (for the alliance leader

Compared with integrating a new set of things into the flight control, the workload of just rewriting the test program is obviously much smaller.

After all, the engine start test process does not involve the behavior of any wing action surface, only the throttle valve is a degree of freedom that needs to be considered.

Of course, at the hardware level, Factory 132 also needs to install some sensors inside the air intake of prototype No. 1001.

Fortunately, it's not a big job that requires a lot of effort to dismantle the aircraft.

In short, with the joint efforts of everyone, four days later, all preparations were completed for the first engine start test of Project 10.

Just in time for the day before the planned date on the schedule.

Engine testing has extremely high requirements for the site. During the testing process, a strong negative pressure area will be formed in front of the inlet, and behind the micro-nozzle is a high-temperature and high-pressure area. Therefore, it is impossible to continue to complete it in the original assembly workshop. It needs to Drag it to a dedicated testing site.

And this will be the first time that the Project 10 prototype is exposed to the sun.

Xu De, the person in charge of the final assembly of the No. 1001 prototype and the deputy chief engineer of the No. project, led the workers to conduct a final inspection of the aircraft. After confirming that it was correct, he signed his name on the record sheet with military representative Wang Guangyan.

"What does it feel like now?"

Chief Engineer Xue Chishou looked at the aircraft tractor that was carefully reversing, and asked Xu De, who had just put down his pen next to him.

"It's almost the same as the day my daughter got married..."

The latter raised his hand and gently patted the edge of the plane's wing.

"But, there is still a difference."

"What's the difference?"

"I hope this daughter will go back to her parents' home less often."

Xu De replied cheerfully while taking off his gloves.

It is inevitable for the prototype machine that has completed final assembly to return to the final assembly workshop for maintenance and modification, but if it is reworked too many times, it is definitely not a good thing.

Several ground crew members jumped off the tractor and fixed the plane's front wheel to a long tow bar.

Not only is the aircraft of Project No. 10 new, but even the supporting aircraft tractors are new.

In the past, China's aviation forces and various aircraft manufacturing plants basically used Dongfeng trucks, 212 Jeeps and tractors to tow aircraft.

For some small planes, sometimes even a car is not used, and manpower is used directly.

For those old-fashioned second-generation or second-and-a-half-generation aircraft, this has nothing to do with it except that it is inconvenient and looks crude.

However, as a third-generation aircraft, the J-10 is still relatively delicate. Since ordinary civilian vehicles are not specially designed, a large amount of resonance will be transmitted to the body during the towing process, which may affect the operation of some subsystems.

For this reason, Factory 132 spent huge sums of money to import this low-structure special aircraft tractor.

"Today is June 6nd?"

Chang Haonan, standing on the other side of the plane, noticed a calendar hanging on the wall not far away.

"Yeah, Children's Day just happened yesterday."

Yang Wei was wearing work clothes, and his eyes were squinted by the sunlight coming directly from the factory door. His attention was focused on the metallic aircraft in front of him, and he answered this seemingly nonsensical question in a half-joking tone,

"Chang Gong, although you are indeed young, you may still be a little old for Children's Day."

Chang Haonan didn't answer, just smiled and shook his head.

June 1997, 6, in the previous life, was the day when the first prototype of the J-2 was completed and rolled off the production line.

On the current timeline, although the manufacturing of the prototype of Project 1001 has been accelerated due to various reasons, this day has become another important day for the prototype of Project .

For a large project like the J-10, it is impossible to keep its progress and basic design secret. In fact, as early as 1994, satellites captured blurry pictures of early full-size models. In 1996, the U.S. Office of Naval Intelligence even An imaginary picture of China's third-generation aircraft that is quite close to the real situation has been released, and it is predicted that it will enter service around 2003.

Therefore, as the aircraft was slowly pulled out of the workshop, the group of people simply opened up and followed on both sides like guardians, walking towards the test workshop in the other direction of the factory.

Xue Chishou, on the other hand, simply rode a 28-inch large bar and was the pioneer at the front of the taxiway.

No one got on the bus prepared for them.

Song Wencong was walking in front of Chang Haonan. He seemed to suddenly remember something midway, slowed down a little and asked the latter:

"I have heard from Xiao Yang in the past two days that you are going to wait until Liming gets the turbofan 10 out and then directly use the DSI inlet on Project ?"

Facing this old man who devoted his whole life to the Chinese aviation industry, Chang Haonan still did not boast too much:

"Currently we can only say that we have this idea. We will have to test the performance and suitability of the DSI inlet on Guizhou Airlines' new trainer aircraft later before we can draw a final conclusion. After all, modifying the inlet design is not a trivial matter. , we cannot take risks directly on Project No. 10."

There are improved models from previous generations, so he certainly knows that DSI air intake is feasible.

For a medium-sized single-engine fighter, the high-speed performance trade-off has no practical significance at all. It is far less practical than reducing the weight of more than 100 kilograms and the drag coefficient by a few percent.

However, the J-10B/C is a design that only appeared in the 2010s, and the conditions in all aspects are not a little better than those in the 90s. Therefore, Chang Haonan also needs a relatively simple project to practice his skills before he can study the J-10.

This can also minimize the impact on the project schedule.

……

About an hour later, prototype No. 1001 finally arrived at the engine test station.

Everything here has been ready as early as last month, just waiting for this aircraft, which has gathered the efforts of thousands of people, to be in place.

"The ground around here has been swept, right?"

While the staff was fixing the aircraft, Chang Haonan confirmed with Zhou Ziquan, director of the flight test station and person in charge of the flight test.

He knew that two AL10FNs were scrapped during the engine test start-up phase of the previous J-31, but he had no impression of the specific reasons, so he could only strive to do his best in every aspect.

Under other circumstances, such a straightforward question would actually be a bit offensive, but at this moment, no matter how careful you are, Zhou Ziquan naturally understood and nodded in reply:

"It has been cleaned, not only once, but also tested with a metal detector to confirm that there will not be any metal debris in the environment."

"In addition, we also..."

Just as the two were discussing the various preparations before the test, a report came from the work station that the aircraft had been fixed, powered on and hydraulic preparations were completed.

Everyone exited the test site in order and stood in another small room separated by bulletproof glass to watch.

The leaders looked at each other and finally handed the walkie-talkie to the chief designer Song Wencong.

It's perfect for him to make the beginning.

Song Wencong looked at the old guys (and a young guy) in front of him, nodded, and slowly picked up the walkie-talkie:

"Project No. 1001, Prototype No. , engine ground test, start!"

An engineer in the nearby operating room pressed the start button.

Suddenly, a roar resounded throughout the entire testing workshop.

Even through the thick protective wall, Chang Haonan and the others could still hear a little bit.

After a few seconds, the engine speed gradually stabilized and was in the idle state with minimum thrust.

"Start successfully!"

Naturally, this test cannot just be to test the startup, but also to check the working status of the engine under different working conditions.

Although the AL31FN is a relatively mature design, it is one thing to test the engine itself on the bench, and it is another thing to install it on the aircraft and match it with the inlet.

"Speed ​​speed increase, 20%..."

"30%..."

"40%..."

"..."

Of course, Zhou Ziquan still issued the specific command commands later.

Following his clear and sonorous voice, the engine on prototype No. 1001 also steadily and gradually increased its operating speed.

However, when Zhou Ziquan reported 70% of the instructions and the operator continued to push the throttle valve, an alarm suddenly appeared on the test computer screen!

Almost at the same time, the throttle valve opening was forced back to the 40% level.

Such a sudden change caught most people present off guard.

"Report! Throttle valve opening suddenly decreased! Computer alarm!"

There was a hint of panic in the operator's voice.

The calmest among them is naturally Chang Haonan.

He knew that his equipment was working, so he pushed through the crowd and came to the door of the control room, explaining inside:

"The active stability control system detected the signs of engine surge, so it forcibly intervened in the throttle control!"

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