Chapter 1331 No Big Problemjpg

Chapter 1331 No big problem.jpg

Similar to what Chang Haonan estimated, after confirming that the X51A aircraft test failed and lost contact, Boeing, Pratt & Whitney and the Pentagon held a press conference that night and then set up a joint investigation team.

Of course, after all, it was just an accident within the normal range, and the Spring and Autumn style was in place, so it did not trigger the accountability mechanism.

The investigation team was still formed from within the project team, led by the project leader Dr. Shapur Collinger, but with the addition of several engineers from the Defense Advanced Research Projects Agency. The purpose was not to supervise, but simply to speed up the work progress as an assistant out of consideration of the clearness of the bystander.

After that, Collinger divided the entire investigation team into two according to convention, and each independently collected and analyzed the telemetry data, and then conducted a detailed fault tree analysis to ensure that the confirmed abnormal data was accurate.

Even with all the first-hand information, this process alone took almost a month.

It should be said that from the perspective of accident analysis alone, this series of operations under Collinger's command was no problem.

But the loss of control at both the theoretical and engineering levels was not something that a senior engineer like him could save by his own efforts.

Just as Chang Haonan sorted out the report and handed it to Zheng Liangqun.

At the Wilmington Test Center on the other side of the earth, the first plenary meeting of the joint investigation team since its establishment was also in progress.

Ke Lingjie sat at the head of the long conference table, with two laptops placed parallel in front of him.

Those were the analysis results submitted to him by the two fault tree analysis teams separately.

If the two are the same, then it can be confirmed as an effective hazard source, and if there is a disagreement, it is necessary to return to the last identical link in the tree analysis and repeat the above steps.

"Ladies and gentlemen, Dr. Sheldon of the Defense Advanced Research Projects Agency and I have read all the two submitted reports."

It was only more than a month after the accident, Ke Lingjie's hair, which was originally quite dense, had already shown signs of baldness, and his tone was full of fatigue when he spoke:

"In the end, we determined that the accident trees formed by the two teams can be identified in the same way..."

When this sentence came out, the entire conference room suddenly reached an extremely subtle atmosphere.

It can be said that some are happy while others are sad.

For most of the subsystem leaders, including Dr. Collinger himself, although the test results themselves did not meet expectations, as long as they could complete the accident analysis process normally and then solve the problems in a targeted manner, it could be considered a good progress.

But Daniel Jabolenski, who had a guilty conscience, was instantly extremely nervous.

After all, he knew very well that the test report of the solid rocket booster was processed.

There was no need to conduct an accident tree analysis, just find all the original data and reanalyze it, and you can see the trick.

Almost subconsciously, he turned his head to look at Mellie Hurst next to him.

After the Alaska trip last Christmas, the two had become grasshoppers on the same rope.

However, the latter still looked normal, as if nothing had happened.

As if he had noticed the other party's panic, Hurst turned his head and gave him a reassuring look.

But this did not calm Jabolenski down, but instead made his heart beat faster.

He turned slightly to the side, as if he wanted to say something to Hurst.

But he was interrupted by Collinger's voice:

"The accident analysis team determined that the aircraft did not successfully accelerate to the expected value."

"After the engine started running, it was observed that the temperature and pressure in several internal compartments were abnormal. After studying 156 different nodes, it was found that the source of the accident pointed to the sealing problem of the interface between the exhaust port at the rear of the engine and the installation pipe port of the aircraft body..."

When the first sentence was finished, Jabolenski almost fainted because of nervousness.

But he immediately realized that the other party's "failed to accelerate to the expected value" refers to after the scramjet engine was started, not before.

And the following content shows that the accident analysis team did not consider the problem of the booster at all, but directly aimed at the aircraft body.

Before he could figure out the whole story, he heard Ke Linjie continue:

"Although we knew during the wind tunnel test that scramjet engines and hypersonic flight would form a strong thermal environment, we still underestimated the intensity of this effect to a certain extent. According to indirect calculations based on sensor data, after 140 seconds of flight, the scramjet engine body actually stretched by about 0.75 inches due to heat, which increased the difficulty of sealing the interface between the engine and the aircraft body..."

"The two teams removed the engines on the No. 2 and No. 3 verification aircraft respectively, and finally found that the seals could not withstand such amazing high temperatures and deformations, causing the engine to work. When the engine was working, part of the hot air that was supposed to provide thrust contribution was not discharged according to the designed exhaust port channel, but leaked from the cracked cracks into several compartments at the tail of the aircraft."

"On the one hand, the rising temperature was enough to melt the circuit boards of the telemetry equipment and the welding of other key equipment. On the other hand, it also caused the working cycle of the SJX61-1 engine to be disordered and lost some thrust, which was consistent with the situation observed on the day of the test flight..."

"..."

Jaboloriski was very serious at first, and even memorized a lot of notes.

But soon, he paid attention to some details other than technology:

For example, in this analysis conclusion, a series of problems such as wind tunnel research, theoretical computing, bomb design, engine production, etc. are mentioned.

Highlight a rain dew.

It seems that each link is related to this "partial success".

As we all know, everyone needs to take responsibility, which is equivalent to that everyone does not have to take responsibility.

As for why the Rockets they are responsible for the Rockets are not mentioned ...

It is estimated that it is just because it is not important enough.

About half an hour later, Collinje finally read the lengthy preliminary analysis conclusion, and set new tasks to the team members who re -combined into one.

It wasn't until this time that Jobrenzki, who had a heavy mind, finally stopped panic.

But he was quickly replaced by doubt and curiosity.

There is no mistake, one, one, one, one, one, one, one, one 619, one book, one, one, one, one, one, one, a book!

Therefore, he quickly found Helster:

"Meli, why ..."

The latter seemed to have expected that Joberusky would come over, and even before he said the question, he shrugged and answered:

"It's not surprising ... After all, the super -burning stamping engine has successfully started, and it has been working for more than two minutes. It should not be found on our heads."

"Furthermore, as long as you can find the cause of the accident, it is not good for everyone to trace the roots."

This is almost equivalent to admitting that the entire accident tree analysis process is greasy.

Joberrenky does not have much engineering experience, but he is also very clear that if you do not follow the roots, the so -called "cause of the accident" is likely to have a problem.

"So Dr. Collinjie asked ..."

"Of course not."

His words were interrupted again by Herst:

"It is the meaning of the Senior Defense Research Planning Bureau. It is difficult to say how much Collinje knows ..."

At this moment, Joberosky suddenly realized that although his team was halfway, he participated in the research and development plan halfway, but under the operation of the relationship between the relationship between the relationship and the work of the relationship, it seemed that the entire project was quite deep ...

Until he left the conference building of the test center, he was in a stagnant state.

I don't even know how to get out of Hrst.

It happened at this time, he saw Collin Jie standing at the door.

"Collinjie Director."

The ghost made the gods, and he stopped from behind him.

"Dr. Jabolosky?"

Collinjie also recognized him.

After some brief greeting, Jobrenzki asked quickly:

"Mr. Director, I want to know why the ultra -burning stamping engine is still started normally without the speed of the planned threshold ... and will this affect the subsequent work?"

This problem is obviously beyond the expectations of Collinjie.

After a while for a long time, he replied:

"In terms of project, there must always be a part of the balance. There are some differences between the actual situation and the calculation in advance, but the influence ..."

He hesitated for a moment:

"At least for the current information, the problem should not be big."