A big country of aerospace with black technology

The main test of the linkage test is the control ability of each engine and the ability of comprehensive adjustment.

Especially when the number of rocket engines increases, the attitude control system of the entire system becomes more difficult.

For example, it is very easy for a person to do one thing at one time, and it is relatively easy for some people to achieve two tasks at one time. Most people can do it after a little training. For a small number of people, a little training can still do it.

However, it is almost impossible for a person to control and do eleven things at the same time.

Now, the control system that Zhang Xingyang and the others are working on is equivalent to the human brain. This brain needs to control and do eleven things at the same time.

You can imagine how difficult it is here.

And these eleven things are not simple things, but rocket engines that can be called industrial pearls.

The propulsion force of each machine has reached hundreds of tons, which can truly be regarded as the ability to lift mountains. This is a miracle of human industry, and it is also the crystallization of human wisdom.

The linkage test of two engines, and the linkage test of four rocket engines were all relatively smooth.

Because of the joint ignition test of the four rocket engines, there is no particularly big difference from the various types of rockets that the Rocket Research Institute has been developing before.

But starting with the joint test of five rocket engines, the whole thing became complicated.

Because from this time on, the position of the rocket engine has also become a key consideration for everyone in the Rocket Research Institute.

There are mainly two different schemes, center layout and surround layout.

The central layout arranges one or more rocket engines in the center of the rocket, and the rest of the rocket engines are arranged in a ring around the position.

The biggest difference between the surrounding layout and the central layout is that the surrounding layout does not place a rocket engine on the center satellite of the rocket, and all the engines are arranged in a ring on the outer ring of the bottom of the rocket.

Both options have their pros and cons.

With the central layout scheme, the rocket mainly relies on the engine in the center to provide thrust and decelerate during recovery, and the other engines generally will not start unless it is when large-angle adjustments are made.

In this way, it can effectively reduce the working time of other rocket engines and improve the overall service life, and the control system required for a single rocket engine to decelerate is also simpler.

With the surround layout, when the rocket is recovered, it needs to turn on three different rocket engines to decelerate and adjust its attitude.

In comparison, the control difficulty in the entire recycling process will be higher, and the service life of the engine will be shorter.

To know the use time of a rocket engine is different from that of an aircraft engine.

Aircraft engines usually use hours to calculate the use time. Taking the WS-10 engine that was just developed before as an example, the first-generation engine generally has a use time of three to four hundred hours.

The time of a rocket engine is usually calculated in seconds, and the working time of an ordinary rocket engine usually does not exceed 200 seconds.

Taking the first-stage engine of the Changsanyi rocket as an example, during the entire launch process, from ignition to detachment of the first-stage rocket, the total time does not exceed 130 seconds.

During the recycling process, every extra second of use means that the time will be reduced by one second when it is used next time.

The cost issue here is also something everyone has to consider.

Of course, in this linkage test, various scheme designs must be tested.

Regardless of whether it is a center layout or a surround layout, an engine linkage test must be performed.

After all, practice is the only criterion for testing truth.

Only after actual testing can everyone know the pros and cons of these two different solutions.

Although Zhang Xingyang knew that there were some big pitfalls in some of the plans, he still didn't say anything.

I am not a omnipotent god. There are some pits that everyone must fall into by themselves. Only after the pain can be remembered. These pits cannot be stepped on again.

The power of an individual is limited, but the power of a collective is infinite. If you want to bring the entire country into the Star Sea era, it will never be enough to rely on yourself alone. You must have enough people with you.

"The layout of the seven rocket engine centers was linked to a test, and a failure occurred. The engineers at the test center are doing emergency repairs."

Geng Bo told Zhang Xingyang about the problems that occurred during the test just conducted.

Because of the compensation from the International Insurance Fund for the "226" rocket accident, plus some other miscellaneous income, the Rocket Research Institute is now very rich.

But the more money you have, the faster you spend it.

For this multi-engine linkage test, Zhang Xingyang directly asked the 112 factory to rush to manufacture more than 100 engines, and the manufacturing cost of the engines alone exceeded 100 million.

Not to mention the manpower and material resources spent on testing, which is also a lot of money.

"Have you found the cause of the failure?" Zhang Xingyang asked.

Because different schemes of rocket engine layouts are being carried out on several test platforms at the same time, it is impossible for Zhang Xingyang to take care of all the test platforms by himself.

Therefore, Geng Bo is in charge of the test bench for the layout linkage test scheme of the seven engine centers.

Zhang Xingyang was not surprised that there was a failure problem, although after adopting the double return to zero system, the rocket engine itself no longer had problems.

However, since the entire control system is newly designed, it is not surprising that various problems arise.

"It is still under investigation, but according to the situation at the time, it is likely to be caused by the mutual disturbance of multiple engine jets."

Geng Bo spoke out his current conjecture a little tiredly.

Since the accident happened just now, and the investigation of the fault problem has just begun, Geng Bo cannot fully determine the cause of the problem.

Hearing Geng Bo's conjecture, Zhang Xingyang frowned.

The problem of jet flow disturbance involves the problem of fluid mechanics. Given the complexity of the jet flow problem of rocket engines, I want to thoroughly study and understand the problems here.

It is necessary to rely on supercomputers to solve the problem, but the number of domestic supercomputers is currently limited, and only a few domestically produced supercomputers still need to be used in the development of ballistic missiles and weather forecasting.

If you want to apply for it, you don't know that you have to queue up until the year of the monkey to get it.

As for imported supercomputers, let alone talk about them, there is a special word these days, glass house, to describe it.

Especially for an industry with a special nature like rocketry, basically don't even think about it.

"Do I have to solve the supercomputing problem first?"

Zhang Xingyang thought silently in his heart.

In fact, even if he wanted to do supercomputing, it was too late, and the time did not allow it.

"The problem of jet flow disturbance, please put it aside for a while, and I will think of a solution."

Hearing this, Geng Bo's expression was also a little sad.

This is almost the dilemma faced by this generation of scientific researchers. The poor scientific research conditions have curbed their research ability, and they can only rely on their own continuous efforts to close the gap with others.

However, it is precisely because of the efforts of this generation that it took off later.