A big country of aerospace with black technology

"Other aspects, I don't see any major problems mentioned in the report, but there are also some minor problems."

"These must also be taken seriously, and all problems must be eliminated on the ground!"

Zhang Xingyang read the last one, which is the test report of the fifth experiment. In addition to mentioning the problem of engine synergy that everyone pays more attention to at present, Zhang Xingyang read it.

In fact, some minor problems were mentioned, such as certain flow regulation problems in the storage tanks that supply liquid oxygen and kerosene to the 11 engines.

To know the flow of the engine, it almost directly determines the thrust of the rocket engine.

Of course, the problem of flow regulation is not a big problem, but when the engine is adjusted to the super flow mode, the flow will be unstable.

This problem seems to be quite big. After all, if the flow is unstable, the thrust of the engine will not be stable either.

If the thrust is unstable and the attitude of the rocket cannot be adjusted in time, the rocket will easily deviate from its orbit.

Of course, this problem is actually quite small. After all, it is difficult for the rocket to achieve such a flow mode when it is in use, and it is only possible when there is an almost endless flow supply when it is on the test bench.

And if you want to solve this problem, it is not very difficult. You only need to add a restrictor valve to the turbopump responsible for pumping liquid fuel into the combustion chamber of the rocket engine to solve the instability in the over-flow mode. question.

"We have noticed these small problems. Before this test, we have improved almost all the problems found in the previous tests."

"Although there are still some areas that cannot be improved, they will definitely be resolved before the finalization!"

What Geng Bo said is very confident, but the specific treatment results still depend on follow-up experiments.

"The sixth 1210-ton propulsion system experiment will start in a little time. How long do you think it will take to finalize it?"

Zhang Xingyang did not continue to entangle Geng Bo on the issues of the previous tests, but instead talked about this test and the follow-up finalization.

After all, if you want to test-launch the new recyclable rocket within 1997, you have to formally determine the final plan of the propulsion system at least before June.

Otherwise, the overall development progress of the rocket will definitely be delayed, and it will cause difficulties in the development of the entire low-orbit satellite communication network.

After all, after the development of the propulsion system is completed, other systems need to be integrated and tested.

All of these will take a long time, that is, thanks to the parallel development of the entire rocket development system.

The propulsion system, control system, communication system, and structural design are all developed simultaneously.

It's just that the most difficult thing to develop here is the propulsion system. After all, the propulsion system solution adopted this time has hardly been developed by anyone in China before.

For example, various other systems have great similarities with the various rockets developed before, and everyone can learn from them.

The difficulty of research and development is not particularly high. In fact, the most difficult part of the whole system is the design of the shape and structure and the design of the propulsion system.

Because the shape adopts the design of a two-stage rocket, the structural requirements are more stringent, and the aerodynamic layout is also more demanding.

However, the aerodynamic requirements of the rocket are not as strict as those of the missile, and because of the use of a super-thrust propulsion system.

As the saying goes, if you fly a brick with great force, as long as the thrust is strong enough, even a brick can send you into space.

Therefore, the difficulty in designing the shape and structure is still slightly smaller than that of the propulsion system.

Therefore, the success or failure of the propulsion system almost determines the development progress of the new recyclable rocket.

"The sixth test bench test of the 1210-ton propulsion system begins!"

Geng Bo issued an instruction to start the experiment through the microphone on the console.

More than a dozen high-power turbopumps are running at full capacity, delivering tons of fuel and oxidant to the combustion chambers of eleven rocket engines within a second, and then fully combusting them.

Then millions of liters of high-pressure gas are sprayed to the ground along the exhaust pipe of the engine in an instant.

Afterwards, these flame jets, which were enough to dry up a small lake, flowed along the diversion trough to the surroundings, forming a series of fire dragon pillars.

This is a real miracle of modern industry and the crystallization of the wisdom of modern Chinese people.

Although there are many efforts of Zhang Xingyang himself, more are the efforts of thousands of scientific researchers, engineers and workers.

After all, the power of a person is always limited, and the power of the collective is infinite.

This propulsion system experiment is a long-term experiment, and the entire propulsion system will work for more than a thousand seconds.

During this process, fuel tanks buried deep in the ground will continuously provide fuel and oxidizers.

Moreover, in fact, the test run time of more than 1,000 seconds is basically a time that can be used in practice.

You must know that the first-stage use time of the Changsanyi rocket will not exceed 150 seconds.

The entire launch process, from rocket take-off to star-rocket separation, will not exceed 1,500 seconds.

Therefore, the entire test run takes more than a thousand seconds, which means that if the launch is actually carried out, such a flight time is enough to transport the satellite to orbit.

"The flow instability in the super flow mode still occurs?"

"How about the resonance state of the engine and airframe at high power?"

At the beginning of the engine test run, Geng Bo was busy monitoring various conditions of the engine, and asked about some problems that occurred during the last propulsion system test, and the performance in this test.

"In the super flow mode, after the speed limit valve is installed, the flow operation is stable."

"The resonance problem has improved, but the resonance phenomenon still occurs during the engine flow adjustment, but the effect is not significant."

The testers responsible for monitoring the operating status of the propulsion system quickly reported various statuses to Geng Bo.

"It seems that the results of summarizing and dealing with problems in the previous few times are not bad, at least this experiment has improved a lot."

After listening to everyone's report, Geng Bo heaved a sigh of relief, turned his head and said to Zhang Xingyang with a smile.

As the actual person in charge of the current propulsion system, Geng Bo still undertook a lot of pressure during these experiments.

For the sixth test, judging from the current operating data, it can almost be seen that it has initially reached the level where it can be used in practice.

It can be regarded as significant progress.

"It seems that after this test, the propulsion system can be preliminarily finalized, and it can be combined with other systems to start comprehensive tests."

Zhang Xingyang withdrew his gaze from staring at the electronic screen displaying the propulsion system, smiled and said.