Chapter 1331 The problem is not big .jpg
The situation was similar to what Chang Haonan estimated. After confirming that the X51A aircraft test failed and lost contact, Boeing, Pratt & Whitney and the Pentagon established a joint investigation team after holding a press conference that night.
Of course, after all, it was just an accident within the normal scope, and Chunqiu's writing skills were 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 several engineers from the Defense Advanced Research Projects Agency were added. The purpose was not for supervision, but purely for the sake of bystander clarity. , serve as a facilitator to speed up work.
After that, Collinger divided the entire investigation team into two as usual, each independently collected and analyzed the telemetry data, and then conducted 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, there was no problem with this series of operations under Collinger's command.
However, the loss of control at both the theoretical and engineering levels was not something he, a senior engineer, could restore by his own efforts.
Just when Chang Haonan compiled the report and handed it to Zheng Liangqun.
At the Wilmington Test Center on the other side of the world, the first plenary meeting of the joint investigation team since its establishment happened to be taking place.
Collinger sat at the head of the long conference table, with two laptops placed in front of him.
That was the analysis results submitted to him individually by two fault tree analysis teams.
If the two are the same, then it can be confirmed as a valid hazard source. If there is a disagreement, you need to return to the last identical link in the tree analysis and repeat the above steps.
"Everyone, these two submitted reports, Dr. Shelton and I have all seen it with the Senior Defense Research and Planning Bureau."
Only for more than a month from the accident, Collinje's original lush hair has already had bald symptoms, and his tone was full of exhaustion when he spoke:
"In the end, we determined that the accident tree formed by the two teams can be performed in the same determination ..."
When this sentence is exported, the entire meeting room suddenly reached an extremely subtle atmosphere.
It can be said that some families are happy and some are sad.
For most of the heads of the system, including Dr. Collin Jie himself, although the test results itself did not reach expectations, as long as the accident analysis process can be completed normally, and then solving the problem targeted, it is always a good progress.
But Daniel Jobornsky, who had ghosts in his heart, was extremely nervous in an instant.
After all, he knew very well that the test report of the solid rocket booster had been processed.
There is even no need to analyze the accident tree. You only need to find out all the original data and analyze it again, and you can see the greasy cat.
Almost subconsciously, he turned to look at Mellie Hurst next to him.
After traveling to Alaska last Christmas last year, the two have become a grasshopper on a rope.
However, the latter still looks like usual, and it looks similar to nothing.
As if he noticed the other person's panic, Hester turned his head and gave him a reassuring look.
But this did not calm Joberosky, but became more heartbeat accelerated.
He turned slightly to the side, as if he wanted to say something to Hester.
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 starts running, the temperature and pressure in the internal segments are observed abnormal. After studying 156 different nodes, the source of the accident pointed to the exhaust port and the aircraft body installation of the pipe port of the engine. The sealing problem of the section ... "
When the first sentence was over, Jobrenzki almost fainted because of nervousness.
But he soon realized that what the other party said "failed to accelerate to the expected value" was after the scramjet engine was started, not before.
The following content shows that the accident analysis team has not considered the perspective of the problem with the help of the weapon, but directly aimed at the aircraft body.
Before he could figure out the ins and outs of this, Collingie continued:
"Although we knew during the wind tunnel test that scramjets and hypersonic flight would create a strong thermal environment, we still underestimated the intensity of this effect to a certain extent. Based on indirect calculations based on sensor data, after 140 After seconds of flight, the scramjet engine body actually stretched by about 0.75 inches due to heat, which made it more difficult to seal the interface between the engine and the aircraft body..."
"The two teams dismantled the engine on the verification machine No. 2 and No. 3. Finally, it was found that the sealing could not withstand such amazing high temperature and deformation, resulting in the engine when the engine was working, and some of the heat contributed by the thrust contribution did not according to the design exhaust port that was not designed according to the design exhaust port. The channel is discharged, but leaks from the cracks at the rupture into several cabins on the rear of the aircraft. "
"On the one hand, this resulted in rising temperatures that were 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 part of the thrust, which was different from what was observed on the day of the test flight. The situation is consistent..."
"..." Jobrenzki was very serious at first, and even memorized a lot of notes.
But soon, he paid attention to some other details besides technology:
For example, in this analysis conclusion, a series of issues such as wind tunnel research, theoretical calculations, missile body design, engine production, etc. are also mentioned.
Highlight a rain and dew stain.
It seems that every link is related to this "partial success".
As we all know, everyone needs to bear responsibility, which means that no one needs to bear responsibility.
As for why the Rockets they are responsible for being not mentioned ...
It is estimated that it is just because it is not important enough.
About half an hour later, Collinger finally finished reading the lengthy preliminary analysis conclusion and based it on which he assigned new tasks to the reunited team members.
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 in every song, one post, one content, one 6 one, one book, one book, take a look!
Therefore, he quickly found Hearst alone:
"Meli, why ..."
The latter seemed to have expected that Jabolensky would come, and even before he could ask the question, he shrugged and replied:
"This is nothing surprising... The scramjet engine successfully started and worked normally for more than two minutes. It should not have found our heads."
"Furthermore, as long as the cause of the accident can be found, it is not good for anyone to trace it too far."
This is almost equivalent to admitting that the entire accident tree analysis process is greasy.
Jabolenski did not have much engineering experience, but he also knew very well that if the source was not traced, the so-called "cause of the accident" might be problematic.
"So it was Dr. Collinger who requested..."
"Of course not."
His words were interrupted again by Hester:
"It's the Defense Advanced Research Projects Agency. It's hard to say how much Collinger knows about it..."
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 master and sister who was good at communication, it seemed to have penetrated the entire project ... < br>
He was in a dazed state until he left the conference building of the testing center.
I don't even know how to get out of Hrst.
It happened at this time, he saw Collin Jie standing at the door.
"Collin Jie Director."
The ghost made the gods, and he stopped from behind him.
"Dr. Jabolosky?"
Collinger also recognized him.
After a brief exchange of greetings, Jabolensky asked as quickly as he could cut through the mess:
"Mr. Director, I want to know why the super -combustion stamping engine is still started normally without the speed of the planning threshold ... and will this affect the subsequent work?"
This problem is obviously beyond the expectations of Collinjie.
After a while for a while, he replied:
"In engineering matters, a certain margin must be left. It is normal for the actual situation to be slightly different from the pre-calculation. As for the impact..."
He hesitated again:
"At least for the current information, the problem should not be big."
(End of chapter)