Chapter 755

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

The pneumatic plug nozzle was designed by Gu Lu 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 hand over the drawings to Director Zhou to preside over the production.

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

Hearing Gu Lu ask this question, Director Zhou smiled and replied, "Professor Gu, relax, I have been keeping an eye on the work you gave me when you left."

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

Computer test passed!

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

"How much propellant can this pneumatic plug nozzle save?" Gu Lu asked eagerly.

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

25%, that’s it!

About a quarter of the propellant was saved, and Gu Lu was already very satisfied with the result.

Because this means that the liquid hydrogen and liquid oxygen engine using a pneumatic plug nozzle structure does not have an engine. Compared with the liquid hydrogen and liquid oxygen engine with a bell-shaped nozzle structure, the volume and weight will be reduced by a quarter.

This greatly reduces the load on the engine.

The corner of Gu Lu's mouth raised, with a smile on his face, "The pneumatic plug nozzle was successfully produced, and with the new steel-graphite-chromium alloy material I brought back, it is estimated that it will not be used for long, and it is in line with the Long March 9

The liquid hydrogen and liquid oxygen engines required for launch vehicles will be available!"

…………

What Gu Lu said is correct.

With the development of liquid hydrogen and liquid oxygen engines, various preparations have been put in place, and now everything is ready, all that is left is Dongfeng.

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

Because there are still very few new materials in hand.

Gu Lu just used the few dozen kilograms of new materials he had on hand to make a 1:100 small liquid hydrogen and liquid oxygen engine model just like he did when he designed the liquid oxygen and kerosene engine.

Then comes model testing.

In the model test, all data of the engine performed very well, but there are still several flaws.

In line with the scientific research attitude of striving for excellence.

While Gu Lu was improving these flaws, he was waiting for Director Wen to ship a large amount of new materials.

One month later…

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

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

Gu Lu greeted 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 making molds, 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 just three days.

…………

December 24, 2021.

The sky is clear and cloudless.

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

Because today, an extremely important test will be conducted in the base.

And the object of the test.

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

That's right.

Although no certificate has been issued yet.

But with the precedent of the previous GL liquid oxygen and kerosene engine, everyone in the rocket research and development base has already 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 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 major R&D departments all arrived at the workshop of the liquid hydrogen and liquid oxygen engine.

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

In the workshop.

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

Not too much ink.

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

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

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

Therefore, the workers responsible for filling the fuel all wear anti-static clothing, and the liquid hydrogen and liquid oxygen fuels are all in rubber barrels.

Workers are carefully loading materials into the liquid hydrogen and liquid oxygen engine, barrel after barrel.

And on the side.

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

Simply.

The entire fuel filling process went smoothly.

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

Gu Lu and Director Bi looked at each other, the latter nodded slightly, and Gu Lu directed everyone to transport the engine with fuel to the vacuum experimental cabin.

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

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

In the vacuum experimental chamber, the rear of the engine emits a dazzling blue light.

This shows that the engine is running.

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

‘Vacuum thrust: 8524KN’

‘Vacuum specific impulse: 402S’

Seeing these two data come out, everyone in the control room had a smile on their face.

A success!

And these two figures were higher than they had imagined before.

This is an unexpected surprise.

"Director Bi, congratulations!" Gu Lu turned to Director Bi and smiled.

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

after all.

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

"Professor Gu, this is all your fault!" Director Bi held Gu Lu's hands tightly, his tone unable to conceal his excitement.

The test is successful and everyone is happy.

Just like the liquid oxygen kerosene engine, the liquid hydrogen and liquid oxygen engine workshop only needs to slightly improve the first-generation engine designed by Gu Lu, and then it can be directly installed on the Long March 9 launch vehicle.

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

December 31st.

The last day of the year.
Chapter completed!