The gap is too big.

The key question is that there is a good engine that is not used.

With a poor one.

I really don't know what Su Han is thinking?

Guan Kai said: "Mr. Su! Why don't you use the Fire Dragon H2 engine? Didn't the thrust of the Fire Dragon H2 reach four hundred and nine tons? ”

Su Han said: "The performance of the Fire Dragon H2 is not good. And the Fire Dragon H2 is a disposable engine. We needed an engine that was more powerful and could be reused many times. ”

Ding Liangyang said: "Then I don't know how many times the design life of your Brontosaurus L1 is?" ”

Su Han said: "More than a thousand times!" ”

A thousand times!

Everyone was completely dumbfounded when they heard this.

How is it possible in the world to have an engine with a design life of a thousand times?

Is this still a rocket engine?

Don't be a car engine!

Ding Liangyang said: "Can you talk about the data of the Thunder Dragon L1?" ”

Su Han said: "No problem! Actually, it's not a big secret. Thrust-to-weight ratio of one hundred and ten to one. The room pressure is three hundred and forty atmospheres. Three hundred and thirty-five than the punch. The nozzle area is 1.3 points. ”

What!

When everyone heard this, they were all the bosses with long jaws.

You can stuff a duck egg.

Because the performance of this engine is also too awesome!

The ratio reached three hundred and thirty-five, not to mention.

The room pressure also reached three hundred and forty atmospheres.

The nozzle area is only 1.3 points.

Thrust two hundred two.

Wouldn't that weigh only two tons?

How is this possible?

How is it possible in the world to have such a rocket engine with such awesome performance?

Guan Kai said: "Mr. Su! You're not kidding us! How can your engines be so powerful? ”

Su Han smiled and said, "Is it strong?" It's okay! In fact, we have a better design method. However, it is still under development. ”

The crowd will be completely speechless.

Such a strong engine is not the best!

Is there anything better?

How is this possible?

Ding Liangyang thought of something and hurriedly said, "By the way, Mr. Su!" What fuel does your new engine use? ”

Su Han said: "Methane liquid oxygen!" ”

Methane liquid oxygen!

The crowd was even more incredulous when they heard this.

Guan Kai hurriedly said: "This is impossible! Methane liquid oxygen cannot have such a large specific impulse and thrust. ”

Everyone nodded when they heard this.

Now the global rocket launch field knows that if you want more thrust, liquid hydrogen and liquid oxygen are the only ones.

Methane liquid oxygen.

It is simply impossible to generate such a large thrust.

Su Han just smiled and said, "It may not be!" It's the data that speaks. It's not me talking. If you just don't believe, there's nothing I can do. In fact, all of you here are experts, and I don't tell lies in front of real people. Kerosene engines are prone to carbon deposits, and liquid oxygen engines are too hot and easy to burn out. If you want to reuse, you have to be a methane engine. As for the methane engine, the thrust of the specific impulse is not enough, it is just that the design is unreasonable, as long as it is designed properly, the methane engine can also have strong thrust. This is also the reason why we chose the Brontosaurus L1 instead of the Fire Dragon H2. ”

When everyone heard this, they couldn't say anything at all.

These people are experts.

Of course, they all understand what Su Han said.

But the question of how the design is designed is the most interesting thing.

Guan Kai said: "Mr. Su! So how did you solve the exhaust gas problem? ”

Su Han said: "Our Brontosaurus L1 has no exhaust gas. Because our Brontosaurus L1 adopts a new design called full-flow high-pressure refueling cycle staged combustion. Not a single fuel is wasted. That's why our engines are so powerful. ”

An engine with no exhaust gases?

Really fake!

This kind of is completely indescribable.

Although they can't understand how awesome Su Han's so-called full-flow engine is.

But just a few words of full flow also prove the power of its performance.

No wonder Su Han has always been so calm about rocket recovery technology.

It turns out that people are really confident!

Although everyone also recognized Su Han's awesomeness before.

But everyone also thought that his idea of wanting to recycle the rocket was a bit too whimsical.

But looking at it now, Su Han is not joking.

It can only be said that the brains of super geniuses are different from ordinary people.

……

Finally, it was time for the final preparations before launch.

Everyone stopped talking, and they all stared straight at the big screen.

I want to see if Su Han can complete this miracle this time.

With the end of the countdown.

Three Brontosaurus L1 engines in parallel gushed out a hot stream.

The rocket also slowly broke away from the launch pad and flew towards the sky......

Various telemetry data appears in the hall from time to time.

The cameras on the rocket body and the telescopes on the ground are constantly transmitting various messages to the hall.

The rocket speed is also getting faster and faster.

1,000 km/h...... Three thousand...... Five thousand...... Seven thousand kilometers per hour.

The Dragonfly Q2 has reached nearly six times the speed of sound.

One hundred and sixty seconds later.

The rocket has already entered eighty kilometers above the ground.

In fact, at this time, it can be regarded as entering the quasi-space realm.

But Suhan's goal is the Kármán line.

The rocket continued to accelerate to nine thousand kilometers per hour, seven times the speed of sound, and finally entered beyond the Kármán line.

It's kind of into space.

The hall burst into applause.

Tens of thousands of employees in the hall of the workshop are also looking at the big screen.

See the rocket finally fly over the Kármán line.

All the staff cheered.

After more than two years of hard research and development and work.

I finally saw the rocket I made with my own hands cross the Kármán line.

The excitement is indescribable.

Many even had tears in their eyes.

In fact, becoming an astronaut is the dream of most people when they are young.

But as I grew older, this dream faded away.

Because the profession of astronaut is too detached from reality.

Most of them still have to earn money to live.

But who would have thought that in the future, he would be able to regain his childhood dreams while making money!

It's like a dream when I think about it now.

Of course!

Everyone knows that this is just the beginning easy.

The key is to see if the rocket can complete the recovery work.

At this time, the dragonfly rocket had already turned around and successfully flew back towards the earth.

At this time, the dragonfly rockets were actually all controlled by the dragon.

People are basically not involved in the operation anymore.

Everything is done automatically.

The speed of the rocket on the big screen is decreasing little by little.

The height is also decreasing at the same time.

After entering the atmosphere.

The Brontosaurus engine starts again.

The speed of the rocket dropped rapidly from a speed of eight thousand kilometers.

The speed reduction reached more than 80 kilometers per second.

If someone sits on a rocket, it's going to be a pushback.

When the speed of the Dragonfly rocket drops to more than 4,000 kilometers per hour.

The engine stops.

At this time, the rocket was only forty kilometers from the ground.