We will strive to start hovering launch experiments within the year.

And, of course, the development of electric pump rocket engines.

R&D of 3D printers.

Satellite R&D.

Anyway, there are so many things.

What's more, Shao Yutong's due date will arrive next month.

My wife has a child, why should my husband be by her side all the time!

But before that, you need to get the work done.

……

Su Han took some people to Haohan Company to hold a high-level meeting.

At this time, Haohan Company can be said to be full of energy.

The test run of the Fire Dragon H1 was successful.

Gave the team a shot of chicken blood.

The shot is a world-class rocket engine.

Everyone felt like they were in a dream.

Su Han looked at the crowd: "The success of the fire dragon H1 is inseparable from the results of everyone's efforts. The official unit has ordered ten Fire Dragon H1 engines from our company as testing machines. If it passes, it will be ordered in large quantities. Pan Chi, this year in any case, the monthly production capacity of the engine must reach more than five. Next year, the monthly production capacity will reach 15 units. Our goal is to produce more than 300 engines per year. It is better to let the yield wait for the people than for the people to wait for the yield. Did you remember? ”

Pan Chi said: "I remembered Mr. Su. Rest assured! In less than half a year, I will be able to complete the scheduled task. ”

Su Han nodded and looked at Yin Chenghai, deputy chief engineer of the engine R&D center, and said, "Yin Gong, although the fire dragon H1 was successfully tested, the data did not meet my standards. My goal is to complete the hover test of the first stage of the rocket engine by the year. So you have to have a powerful engine. I hope that your team will be able to complete the prototype testing of the Fire Dragon H2 within the year. The data should be benchmarked against the bear RD180. It can't be worse than them in any way. ”

Everyone was also surprised when they heard this.

The RD180 is arguably the world's most advanced rocket engine.

All design indicators are among the best in the world.

Haohan's second engine wants to benchmark against the RD180.

It's a little too stressful.

Even Yin Chenghai didn't think he had that strength.

Yin Chenghai said: "Mr. Su! Isn't it a bit too radical to engage in thrust of more than 400 tons now? I think it is more prudent to add 50 tons at a time and gradually reach the RD180 standard. ”

The people around him also nodded.

While the Fire Dragon H1 and RD180 are now rocket engines of one class.

But one has just touched the starting line of this level.

And the other one is already a heavyweight in this division.

Huolong H1 wants to wrestle with RD180, but I'm afraid there is still a big gap.

After all, the room pressure of RD180 has reached 25 MPa and 250 atmospheres.

And the fire dragon H1 is only 18MPa.

Don't look at it, it's only 40 percent off.

But everyone knows that the room pressure difference is 10 percent.

The difficulty of research and development has increased by 50%.

Forty percent is several times the difference.

It's definitely not something that can be solved by sitting in an office and moving your mouth.

Su Han said: "I know much more than you how difficult it is to develop a rocket engine. But it's because it's difficult that I have to challenge it. Our company's plan is to complete a manned landing on the moon, which is inherently a difficult thing to climb to the sky. If you follow your pace, let alone ten years, it may not be possible to do it for another few decades. Don't forget, my plan is to complete a commercial manned spacewalk within five years. Now that a year has passed, time is running out for us. ”

When they heard this, they fell silent.

About Su Han's desire to land a man on the moon.

Everybody knows here.

But the problem is that even the employees of Longhan Technology do not believe that Su Han can complete a manned landing on the moon.

Because that's not something that a private company can do.

Hundreds of thousands of people were involved in the research and development of the Apollo project before and after the Mi Federation.

Tens of thousands of companies have contributed to this impossibility in the end.

Although Longhan Technology is a big company.

But no matter how big it is, it's a private business.

How is it possible to accomplish what only one country can do.

It's simply not good or bad.

Not to mention outsiders, even the employees of Longhan Technology think that Su Han is a bit too daydreaming about this matter.

But who would not dare to say anything.

After all, the other party is the boss.

But Yin Chenghai, as the deputy chief engineer, is qualified to speak.

Yin Chenghai said: "Mr. Su! I'm a straight man. If there is something offended, don't blame me. ”

Su Han said: "Say it! Since it's a meeting, speak freely. ”

Yin Chenghai said: "Actually, as for what you said about wanting to make a rocket that can be recycled and reduce the cost of rocket launching, I think it was impossible from the beginning.

Even if we can really build a rocket engine comparable to the RD180, it is impossible to reuse it.

Because of the current high-end engine, there are several technical routes. Traditional liquid oxygen kerosene engine, high-end liquid oxygen liquid hydrogen engine.

Environmentalism is now in vogue.

Traditional kerosene liquid oxygen engines are polluting and toxic, and have been criticized for not being environmentally friendly.

So now the whole world is taking the route of liquid hydrogen and liquid oxygen.

However, one of the characteristics of liquid hydrogen and liquid oxygen engines is the high temperature.

The high temperature has a large loss on the engine.

Because the motivation under this high-temperature calcination cannot be reused at all.

Even if it can barely be recycled, the maintenance pressure is high, and it is better to build a new one.

Exchanging its production for cost has always been the general rule in the field of global rocket launches.

If our company wants to build a rocket engine that can be reused, then it must use a conventional gas generator cycle engine.

This is because it is possible to reuse only with conventional kerosene and liquid oxygen combinations.

However, kerosene has the problem of kerosene, which is easy to accumulate carbon, and carbon deposition blockage can easily cause engine explosion. Although the probability of clogging can be reduced by adjusting the oxygen ratio and incomplete combustion through rich combustion combustion, the thrust is not enough if there is too much exhaust gas. The critical room pressure is not enough, the specific impulse is also poor, and the payload efficiency is low.

This is why gas generator cycle engines are all obsolete models without exception.

After all, not enough thrust is too much waste of payload.

The rocket is not small, and the thrust is not enough, which is also a problem.

Let's not talk about the manned landing on the moon.

Let's just say that I want to complete a spacewalk in low earth orbit!

Low Earth orbit must have at least ten tons of load!

Ten tons of load also require at least five or six hundred tons of thrust.

Such a large thrust.

Want to use an old gas generator to cycle the engine.

At least 10 or more units are required to do this.

If nothing else, the diameter of the nozzle is not enough.

What's more, environmentalism is now practiced all over the world.

Space launch is also about safety and non-toxicity.

If we go back and engage in liquid oxygen kerosene engines.

Isn't that a step back in R&D?