bonanza

Chapter 906
Just when Yang Miao was about to throw the little tiger down in anger, she suddenly felt light on her back.

The little tiger jumped off his back and rushed directly to the trash can next to him...

Yang Miao winked at the bodyguard.

When the bodyguard came back from buying water, the little tiger was already chatting with the trash can.

After a short meeting, there were many people around, pointing and pointing at them.

This isn't a nightclub, and it's not uncommon for girls to get drunk.

Suddenly a middle-aged man came out, waved his hands around and said, "Let's go, it's all gone, there's nothing to see!"

After finally blowing the crowd away, the middle-aged man trotted forward and came to Yang Miao, "Young Master Yang, is it really you?"

"Young Master Yang?" Yang Miao was a little overwhelmed when he heard this address for the first time.

It took a while to figure out that this person was the hotel manager.

A large area of ​​buildings nearby, including this building, as well as the hotels, shopping malls, restaurants, and movie theaters inside are all their family's property.

"Do you want to arrange a lounge for you?" The manager looked at Yang Miao, then at Li Qi.

"No need!" The little tiger jumped up all of a sudden, and waved his hands very proudly.

Seeing this, Li Qi quickly handed her a tissue.

Yang Miao handed the water to the little tiger, and said angrily, "Let's see if you dare to drink in the future!"

After some tossing, the little tiger always got into the car.

The little tiger kept muttering, "I study aerospace, I want to be an astronaut, go to space..."

Yang Miao looked at the little tiger, and suddenly asked Li Qi, "Did anyone tell her that learning aerospace is to send others to space, not to go to space by herself?"

"It seems... no!" Li Qi said.

……

On the second day, Yang Dongsheng listened to a report on the latest achievements of Dongsheng Aerospace.

The thrust of their rotary detonation engine prototype has reached 1.5 tons, reaching the world's leading level.

But the combustion is still unstable and needs to be further refined.

The 6.2-kilowatt Hall thruster has a thrust of [-] N.

Also reached the world's leading level!
The thrust of the 5-kilowatt Hall thruster that the United States is preparing to launch is only about [-] N, and it is achieved by tying three together.

At least one generation behind them.

Their Hall thrusters have been adopted by the high-throughput communication satellites being developed by the Chinese Space Station.

Finally, Yang Dongsheng focused on the progress of the satellite project.

A few days later, the drone that flew to Xinjiang Province flew back after a simple inspection.

In Chang'an, the plane was taken apart for a more thorough inspection.

The two engines were removed first.

This is a product developed by Dongsheng Heavy Industry based on the small bypass ratio engine core machine they developed for the J-20, combined with their latest achievements in engine technology.

It is more powerful than the Pratt & Whitney J-58 engine equipped on the Blackbird strategic reconnaissance aircraft.

Without relying on rocket engines and scramjet engines, it can fly to an altitude of 28 kilometers, with a speed of up to Mach 4 or more.

It far exceeds the maximum flight altitude of the Blackbird of 26 kilometers and the maximum flight speed of Mach 3.35.

But even so, the success rate of scramjet ignition is still not high.

In the next step, they will either find a way to continue to increase the speed, or improve the scramjet engine to reduce the technical difficulty of ignition.

Researchers want to further improve the technology and pursue perfection, which is worth encouraging.

But Yang Dongsheng had to think about it holistically.

SpaceX has successfully recovered the first stage of its rocket.

Musk will definitely engage in the Starlink project next.

Rockets can be studied slowly, but once the corresponding orbits and frequency bands are occupied by the Americans, they will never be taken back.

Musk and his company, in addition to being competitors of Dongsheng Group in aerospace, are also their biggest competitors in the field of electric vehicles.

The future is their archenemy!

Yang Dongsheng couldn't fall behind.

"If you remove the scramjet and directly use the rocket engine to ignite at high altitude, can it be equal to the cost of SpaceX?" Yang Dongsheng asked.

The core technology of SpaceX is not rocket recovery.

Want to achieve rocket recovery.

First of all, the hull of the rocket needs to be strengthened, and "legs" should be added to the rocket, which adds a lot of dead weight.

Secondly, when launching, fuel must be reserved for use when landing.

Third, before reuse, the recovered hull should be overhauled in detail.

There are not many benefits that can be generated from this.

The propaganda effect of rocket recovery is greater than the actual effect.

To put it bluntly, it is for attracting investment.

The real core technology of SpaceX, the first is to turn the rocket engine from a handicraft that can only be made by hand into an industrial product that can be manufactured on a large scale.

The launch cost has been greatly reduced.

The second is the engine control system developed by SpaceX.

No matter how big a rocket it makes, SpaceX only needs to stack the same type of engine on it.

When the rocket is manufactured, the thrust is left with a margin.

During the launching process, if any engine is damaged, the system will automatically shut down the corresponding engine on the other side to ensure the balance of the entire hull and ensure the final launch is successful.

After listening to Yang Dongsheng's question, the people below said after some discussion, "There should be an advantage!"

SpaceX recovered only the first stage of the rocket.

The first-stage rocket can fly to a height of about 70 kilometers, and the speed is generally about Mach 6.

Now they can only fly up to 28 kilometers with jet engines, and push the speed to Mach 4, which seems to be much worse than the first-stage rocket.

But they can use atmospheric oxygen as an oxidant, and don't need to bring their own oxidant.

Moreover, they take off horizontally, and the thrust only needs a fraction of their own weight.

It does not need to be like a rocket, the thrust must be greater than its own weight.

In addition, when their airframes and engines were first designed, they were designed to be reusable.

No cumbersome checks like SpaceX does.

Taken together, they have advantages.

"That's good!" Yang Dongsheng made a decision directly, "We will temporarily remove the scramjet link, use jet engines and rocket engines, and strive to launch the first satellite in 2017!"

The people below picked up their pens and took notes one after another.

"Of course!" Yang Dongsheng glanced around, "The scramjet and rotary detonation engines can't stop either!"

After leaving Chang'an, Yang Dongsheng rushed to Kyrgyzstan Province, where the first phase of the port project has been completed.

At the same time, Yang Dongsheng found that his abilities had grown significantly again.

(End of this chapter)