Chapter 755

"Director Zhou, how is the production of the pneumatic plug nozzle I designed?" asked Gu Lu to Director Zhou.

The pneumatic plug nozzle is designed by Gu Lu in order to save the amount of propellant in the engine.

Before leaving.

Gu Lu has already drawn the design drawings of the pneumatic plug nozzle.

And the drawings were handed over to Director Zhou to preside over the production.

Gu Lu didn't know what the current situation was.

Hearing Gu Lu ask like this, Director Zhou smiled and replied, "Professor Gu, relax and relax, I have been watching this work for me for the past few months when you left. ”

"Just a few days ago, we have successfully produced the required pneumatic plug nozzle according to your drawings, and passed the test on the machine!"

Passed the test on the computer!

When Gu Lu heard these words, his eyes suddenly lit up.

"How much propellant can be saved by this pneumatic plug nozzle?" asked Gu Lu eagerly.

Director Zhou recalled and replied, "We have tested it about ten times in total, and the data we have come up with is that this pneumatic plug nozzle can save about 25% of the fuel of liquid hydrogen and liquid oxygen engines!"

25%, that's it!

Saving about a quarter of the propellant, Gu Lu was already very satisfied with this result.

Because this means that there is no engine for liquid hydrogen and liquid oxygen with a pneumatic plug nozzle structure, the volume and weight of liquid hydrogen and liquid oxygen engines with a bell-shaped nozzle structure will be reduced by a quarter.

This greatly reduces the load on the engine.

The corners of Gu Lu's mouth rose, and his face was full of smiles, "The successful production of the pneumatic plug nozzle, coupled with the new steel-graphite-chromium alloy material I brought back, it is estimated that it will not be long before the liquid hydrogen and liquid oxygen engine that meets the requirements of the Long March 9 launch vehicle will come out!"

…………

Gu Lu's words were right.

The research and development of liquid hydrogen and liquid oxygen engines has been put in place one after another, and now it has reached the point where everything is ready and only the east wind is owed.

After Gu Lu finished the meeting, he immediately followed Director Zhou back to the studio in the liquid hydrogen and liquid oxygen engine workshop.

Due to the fact that there are still very few new materials in hand.

Gu Lu just used the only dozens of catties of new materials at hand, like the original design of the liquid oxygen kerosene engine, to make a 1:100 model of a small liquid hydrogen and liquid oxygen engine.

After that, it's time to test the model.

In the model test, the engine performed very well in all the data, but there were still a few flaws.

In line with the scientific research attitude of excellence.

Gu Lu was perfecting and improving these flaws while waiting for Director Wen to bring a large number of new materials.

A month later......

In Gu Lu's anticipation, Director Wen sent someone to transport the first batch of new materials totaling 1,200 catties.

These new materials are enough to make the casing of a liquid hydrogen and liquid oxygen engine.

Gu Lu said hello to Director Zhou.

Director Zhou immediately summoned all the staff in the liquid hydrogen and liquid oxygen engine workshop to assist Gu Lu in the assembly of the liquid hydrogen and liquid oxygen engine.

As the saying goes, there is strength in numbers.

Some people are responsible for molding, some are responsible for pouring, and some are responsible for assembling.

A liquid hydrogen and liquid oxygen engine more than two meters high was assembled by everyone in three days.

…………

December 24, 2021.

Clear skies and cloudless skies.

In the Long March 9 rocket research and development base in Dongchang, it is a tense and solemn scene at the moment.

Because today, there is an extremely important test to be carried out in the base.

And the object of the test.

It is the first generation of the GL liquid hydrogen liquid oxygen engine, which was produced just yesterday.

That's right.

Although there is no certificate issued above.

However, with the precedent of the previous GL liquid oxygen kerosene engine, everyone in the rocket research and development base has defaulted to naming this new model of liquid hydrogen and liquid oxygen engine with the initials of Gu Lu's name.

This shows the great contribution that Gu Lu has made to this new model of engine.

Around ten o'clock in the morning.

Director Bi and the directors of the other four R&D departments all arrived in the workshop of the liquid hydrogen and liquid oxygen engine.

In addition to these few, there are also many base staff who came from the rest of the R&D departments to witness the history.

Inside the workshop.

The two-meter-high, half-human-wide GL liquid hydrogen and liquid oxygen engine is placed in the center of the workshop.

There is not much ink.

After Director Bi and several leaders arrived, Gu Lu directly instructed the workers to fill the engine with fuel.

Unlike liquid oxygen kerosene fuel, liquid hydrogen liquid oxygen fuel is very flammable and explosive.

If you're not careful, you might explode with a bang.

Therefore, the workers responsible for filling the fuel are all wearing anti-static clothing, and all the liquid hydrogen and liquid oxygen fuel are rubber drums.

Workers are carefully filling the liquid hydrogen and oxygen engines with material, bucket after bucket.

And on the side.

There were more than a dozen people with fire extinguishers waiting for fear of a fire accident.

Simply.

The whole process of refueling was quite smooth.

Several tons of liquid hydrogen and liquid oxygen fuel are all loaded into the engine.

Gu Lu and Director Bi glanced at each other, the latter nodded slightly, and Gu Lu instructed everyone to transport the fueled engine to the vacuum experimental cabin.

Director Bi and several other leaders appeared in the central control room of the vacuum chamber.

After debugging the equipment, Gu Lu pressed the start button.

In the vacuum test chamber, the tail of the engine emits a dazzling blue light.

This shows that the engine is running.

Director Bi and the others stared at the data on the display screen without blinking.

'Vacuum Thrust: 8524KN'

'Vacuum Specific Impulse: 402S'

Seeing these two data come out, a smile appeared on everyone's face in the control room.

First time!

And these two figures are even higher than they thought before.

This is a bonus.

"Director Bi, congratulations!" Gu Lu turned his head and smiled at Director Bi.

Although Gu Lu had long expected that this test would be successful, when it was really successful, Gu Lu really couldn't hide his excitement.

After all.

With the successful development of liquid hydrogen and liquid oxygen engines, the completion of the Long March 9 launch vehicle is one step closer.

"Professor Gu, it's all your credit!" Director Bi clasped Gu Lu's hands tightly, and his tone couldn't hide his excitement.

The test was successful, and everyone was happy.

Like the liquid oxygen and kerosene engine, the liquid hydrogen and liquid oxygen engine workshop can be directly installed on the Long March 9 launch vehicle as long as the original aircraft designed by Gu Lu is slightly improved and improved.

In order to reward Gu Lu for his contribution during this time, Director Bi specially gave Gu Lu a few days off.

December 31.

The last day of the year.

Director Bi was sitting in the office humming a little song while thinking about which department to arrange Gu Lu to after New Year's Day, when a phone call came.