The linkage test mainly tests 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 whole system becomes more difficult.

For example, for a person, one heart and one use is an easy thing to do, one heart and two uses are also relatively easy for some people to achieve, most people can do it after a little training, and one heart and three uses can still be done for a small number of people with a little training.

But it is almost impossible for a person to do eleven things at the same time.

And now Zhang Xingyang wants to do the control system, which is equivalent to the human brain, which needs to control and do eleven things at the same time.

You can imagine how difficult it is to get here.

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

The propulsion force of each unit has reached hundreds of tons, which can really be regarded as the power to pull out the mountain, which is the miracle of human industry and the crystallization of human wisdom.

The linkage test of two engines, all the way to the linkage test of four rocket engines, is a relatively smooth thing.

Because of the linkage ignition test of the four rocket engines, there is no big difference from the various types of rockets that have been developed by the Rocket Research Institute before.

But from the beginning of 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, the center layout and the wrap-around layout.

The central layout arranges one or more rocket engines in the center of the rocket, and the remaining rocket engines are arranged in a circular manner.

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

Both options have their own advantages and disadvantages.

With the center layout scheme, the rocket mainly relies on the engine in the center to provide thrust and deceleration when recovering, and other engines generally do not start, unless it is adjusted at a large angle.

In this way, the working time of other rocket engines can be effectively reduced, the overall service life can be improved, and the control system required for the deceleration of a single rocket engine is also simpler.

With the surround layout, the rocket needs to turn on three different rocket engines to decelerate and adjust the attitude during recovery.

In comparison, the entire recovery process is more difficult to control, and the life of the engine is shorter.

It is important to know that the service time of a rocket engine is different from that of an aircraft engine.

Aircraft engines usually use hours to calculate the service time, taking the WS-10 engine that has just been developed before, for example, the first generation aircraft generally used for three or 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, the total time from ignition to the separation of the first-stage rocket does not exceed 130 seconds.

In the recycling process, every additional second used means that the next time you use it, there will be one less second.

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

Of course, in this linkage test, a variety of scheme designs have to be tested.

Whether it is a center layout or a surround layout, the engine linkage test is carried out.

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

It is only after the actual test that you will be able to know how good and bad these two different solutions are.

Although Zhang Xingyang knew that there were some relatively large holes in some of the plans, he still didn't say it.

He is not an almighty immortal, and some pits must be thrown into them by themselves, and they can only be remembered after the fall hurts, and these pits can not be stepped on again.

The power of the individual is limited, the power of the collective is infinite, if you want to bring the whole country into the era of the sea of stars, it is never enough to rely on yourself alone, you must have enough people with you.

"The layout of the seven rocket engine centers was linked, and there was a failure, and the engineers at the test center were repairing."

Geng Bo said to Zhang Xingyang that the problem that occurred during the test just now.

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

But there is more money, and the speed at which it is spent has become faster.

For this multi-engine linkage test, Zhang Xingyang directly asked Factory 112 to produce more than 100 engines, and the manufacturing cost of the engine 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 there are several test benches with different rocket engine layouts at the same time, it is impossible for Zhang Xingyang to take care of all the test platforms alone.

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

Zhang Xingyang is not surprised at all that there is a failure problem, although because of the adoption of the double zero system, the rocket engine itself no longer has problems.

However, because the entire control system is newly designed, it is not surprising that all sorts of problems arise.

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

Geng Bo was a little tired of stating his current conjectures.

Because the accident had just happened and the investigation had just begun, Geng Bo could not fully determine the cause of the problem.

Hearing Geng Bo's conjecture, Zhang Xingyang frowned.

The problem of jet disturbance involves the problem of fluid mechanics, and the complexity of the jet problem of rocket engines is so important that we want to thoroughly study and understand the problem here.

It is necessary to rely on supercomputing to solve the problem, but at present, the number of domestic supercomputers is limited, and only a few domestic supercomputers still need to be used in ballistic missile research and development, weather forecasting, etc.

If you want to apply for it, you don't know that you have to queue up until the Year of the Monkey to be able to use it.

And the imported supercomputer, not to mention, there is a special word to describe it this year, glass house.

Especially in an industry with a special nature like rockets, you 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 at all.

"The problem of jet disturbance, you can put it aside first, and I'll figure it out."

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

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

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