Due to the long distance from Shengjing to Fucheng, the prototype was transported by a basic Y-8 with a larger range but without a modified airtight cargo hold.

So Yan Zhongzhong, Chang Haonan and others had to take another Boeing 737 and rushed to Fucheng a little later.

At this time, Nanjiao Airport was still a military airport that was not open to civil aviation, but as the staff of the aviation industry system, the planes they took could naturally land here.

Through the porthole, Chang Haonan saw that the Y-8 that had taken off before was parked next to the runway, and a group of people in camouflage uniforms were unloading the engine from the cargo hold and preparing to load it onto the flatbed trailer next to it.

The plane slowly came to a halt at the end of the runway, and a gangway drove slowly.

Perhaps because it wasn't often the place where airliners landed, the driver tried several times to get it right.

After the hatch opened, Chang Haonan did not rush to get up as usual.

It wasn't until everyone else had already left that they stepped out of the plane at the back of the line.

"Hoo ......"

He took several deep breaths in quick succession, feeling the familiar smell in the air.

"Fucheng, it's back again......"

Standing at the top of the gangway, Chang Haonan looked at the green mountains in the distance with a little feeling.

This is also the first time he has come to Fucheng after being reborn.

Although it is not the 29th base, it is still a bit touching after all.

However, this emo sentiment did not last long.

A familiar voice quickly woke Chang Haonan out of his memory.

"Why do you feel that you are a little uninterested, junior brother, and you are still worried about the manufacturing process?"

It's Yao Mengna.

She had just been waiting at the door of the cabin.

Chang Haonan shook his head:

"That's not true, with the surge margin after the improvement of the turbojet 14, as long as you don't make any things like swallowing water and hitting birds, the reliability is definitely no problem."

Regarding the fact that the engine test flight condition is not stable enough, of course, he also told Yao Mengna.

I didn't expect any answer from the other party, but mainly chatted while the calculation center waited for the results.

But surprises always come unintentionally.

"Do you think there is a relationship between the unstable operating conditions of the turbojet 14 and the problem that they have raised before that the engine may stop after firing the Thunderbolt 8 missile from the inboard pylon?"

One sentence made Chang Haonan take back the steps he wanted to take just now.

The period of improving the compressor was really dark, and the missile launch was really a minor problem compared to the turbojet 14, so if Yao Mengna hadn't mentioned it, he would have almost forgotten about it.

"Tell me what you think?"

"I don't have a complete idea, but I just feel that there should be a connection between these two things, or that the underlying cause may be the same."

Yao Mengna shrugged.

"Hmm......"

Chang Haonan tried to continue to think along this line of thought, but he still couldn't find a clue for a while.

"Anyway, let's go over first, don't let Mr. Yan and them wait too long." Yao Mengna stretched out her hand as she spoke, as if she wanted to grab the wrist of the person next to her, but she hesitated for a moment halfway through the action.

As a result, it was a blank catch.

Chang Haonan, who didn't notice his sister's small movements, walked down the gangway quickly and caught up with the crowd not far in front.

Yao Mengna had no choice but to curse herself in her heart for her indecision just now, while trotting behind the other party.

The group sat in two blue and white Coasters parked near the apron.

At the same time, the engine has been loaded on the other side.

The entire convoy began to drive towards the 624 Institute, that is, the gas turbine research institute where Liu Zhenxiang had worked before.

Due to the urgency of time, Yan Zhongzhong took out his notebook on the way and began to assign tasks to the core members who were in the same car with him.

"Comrades, we have a total of 13 tasks in this high-altitude test, which are calibration tests, air performance tests, starting and restarting tests, thrust transient tests, and ...... in order of success."

"The most important thing here is the 8th item, the intake distortion test, that is, the simulation of the situation that may induce surge, is the key link to determine the success of our engine improvement, so I decided to be responsible for the ...... by Comrade Xiaochang."

"Comrade Xiaochang, the content of the first six tests has little to do with our improvement, although it still has to be done according to the regulations, but the process should be relatively fast, and during this time, you can first design the conditions for the intake distortion test......

"After the completion of the eighth item, we need to divide into two, one team to continue the second half of the test, especially the plateau and high and low temperature start, we must make the most rigorous and meticulous data, and the other team to go to Yanliang to prepare for the air platform test ......"

Under Yan Zhongzhong's methodical command, when the group arrived at their destination, they already knew their tasks for the next period of time.

With the help of the staff of the 624 Institute, the first prototype of the improved turbojet 14 was fixed to the thrust bench of the SB101 aerial platform that night.

Due to the lessons learned by Yan Zhongzhong himself in exchange for half a life, no one was allowed in the test cabin during the flight test.

Therefore, Chang Haonan could not directly see the scene when the vortex 14 was working through his own improvement.

The good news is that the data is read in near real-time.

The first step of the test, the high-altitude platform calibration test, was completed quickly.

The thrust bench was then fed into the test chamber.

The tail nozzle of the turbojet 14 engine was aimed at the exhaust cooling device at the back.

The air supply and extraction systems of the aerial station are working at the same time, and the high-speed air flow provided by the two DA3500 compressors is cooled and fed into the pressure stabilizing chamber.

The engine started so successfully that the screeching of the turbojet engine could be heard even from the operating room outside the test chamber.

Aerial performance tests began.

The first thing to be measured is, of course, the standard bench thrust.

"Sea level height, incoming current angle of attack 0°, incoming velocity 0.4 Mach, ready to start testing."

Almost instinctively, the engineer began to follow the process and read out the test conditions.

This would have been a rather boring step for an engine whose main improvement was to increase the surge margin.

Because the envelope of Turbojet 14 is too familiar to everyone.

Almost everyone in the room could draw with their eyes closed.

The standard bench thrust should be 69.6KN.

Although the turbojet 14 was designed to be an engine with a thrust-to-weight ratio of 6.5, in practice, the thrust-to-weight ratio calculated according to the national military standard has always been around 6.2-6.3.

Considering the current status of aviation power in our country, there is nothing unacceptable, as long as the stability is passable.

The engineer who had just read out the test conditions was thinking about this, and the thrust data read by the thrust bench appeared on the screen in front of him.

"Let me see ......"

"As the engine speed continued to increase, the thrust curve finally stabilized at ......"

The engineer in front of the computer screen couldn't help but widen his eyes.

"Click-"

The pen in his hand fell to the ground.

The crisp sound also attracted the attention of others nearby.

"Bench thrust...... 73.5KN！ ”

Plus more as usual in the afternoon

(End of chapter)